The intestine has been specially created for the breaking down of foodstuffs. The chemical events that take place in the walls—and the flawless system involved in breaking foodstuffs down into their smallest components and their subsequent distribution—are truly amazing. Just about every square millimeter of the intestinal wall produces countless enzymes that separate proteins into different peptides and break these down into amino acids, carbohydrates into glucose and fats into fatty acids and glycerol. These enzymes are of very different kinds, with different functions and work at different speeds. An enzyme that breaks down fruit sugar, or fructose, is very different from one that breaks down sugar in dairy products, or lactose, and yet another enzyme breaks down starch. Because, as we have already seen, enzymes have very sensitive working conditions, the temperature and pH here are maintained at the ideal levels for these enzymes to be manufactured and perform their separate functions.

The intestine is specially created to break down foodstuffs. The chemical events that take place in its walls, and the system involved in the breaking down and distribution of nutrients, are truly astonishing.

Since the structure and mode of operation of the stomach and the intestine are completely different, enzymes able to function in an acidic environment must be present in the stomach, while ones able to work in an alkaline one in the intestines. Foods leaving the harsh conditions of the stomach encounter gentler ones in the small intestine. The partly digested food and gastric juices passing from the stomach must do no harm to the intestine. This is where the pancreatic juice comes into play.
As you shall shortly see in some detail, pancreatic juice and its special enzymes enter the duodenum by way of the pancreatic duct and make the pH level more alkaline. In the duodenum, enzymes enable fats to be broken down. The fat-dissolvers manufactured in the pancreas accelerate the digestion of foods by accumulating here. Pancreatic juice contains trypsin, a particularly powerful enzyme, which enters the duodenum in an inactive form, trypsinogen. This is activated by an intestinal enzyme which is triggered solely in the presence of food, and turns into trypsin, which breaks down the peptide bonds of polypeptides into smaller peptide fragments. Trypsin also breaks down large protein molecules that have not been affected by the pepsin in the stomach.

Secretory glands in the duodenum walls also release other enzymes that separate peptide bonds. The bonds that form molecules are torn apart and the final products that emerge as the result of protein digestion are amino acids, the fundamental building blocks of all proteins.

Fats ingested with food are also digested in the small intestine. However, they arrive in the form of small fat droplets. The enzyme lipase involved in fat digestion cannot act on fats when they remain in that state. This is where bile juice enters the equation. Bile is secreted by the liver and stored in the gall bladder, and contains no digestive enzymes. Bile salt present in the bile juice breaks down fats into smaller globules and prepare them to be digested by the enzyme lipase. Up to 90% of bile salt is absorbed as it passes through the lower region of the small intestine, and is then routed back to the liver to be used again for digestion. Once the bile juice has done its job, fat-digesting enzymes then have their turn. The enzyme lipase in the pancreatic juice acts on fats and converts them into fatty acids and glycerol. Throughout this process, hundreds of precautionary steps are taken. Foods arriving from the stomach must not carry the stomach's acidity with them into the small intestine. Specific enzymes for digesting still-undigested foodstuffs also need to be present; and the environment needs to be regulated so as to make all this possible. Chemical messengers need to act accordingly, and helper molecules need to be on hand. It is the pancreas, a very special organ, that secretes the particular juice for all of these tasks.

The Pancreas: The Factory That Produces Digestive Enzymes

The pancreas is a small organ, six inches in size and three ounces in weight. It is named the body's "hidden organ" because of its location concealed behind the stomach. It contains fine, interconnected tubes or vessels that come together in the form of a doorway opening into the duodenum, where pancreatic juice passes through, to play a life-saving role for the intestine.

Despite its small size, the pancreas performs a very important function in secreting digestive enzymes, which are transported to the digestive system in what is known as pancreatic juice. There are other moderating factors in this fluid, of which the pancreas produces up to 5 liters a day63—very high level of production for a organ weighing just 3 ounces. 63

The production of pancreatic juice is triggered when the duodenum encounters gastric juice. After leaving the stomach, foodstuffs have assumed a rather pulpy consistency and they first arrive at the duodenum. This mixture arriving from the stomach is powerfully acidic enough to dissolve the thin, delicate interior of the duodenum. Yet this does not happen, because pancreatic juice is alkaline, neutralizing the acidity in question. Foodstuffs are thus able to pass into the small intestine without endangering it... The production of pancreatic juice is a controlled process. When you sit down at the dinner table, thousands of tiny saclike cavities, or acini, in the pancreas receive stimuli from the nervous system and begin producing pancreatic juice. However, the pancreas does not start working at full capacity until your food actually passes through the duodenum doorway. The more food arrives, the more enzyme that is secreted.

The pancreas can also distinguish between the kinds of food we consume, and secretes different enzymes accordingly. For example, when you eat foods such as pasta or bread that are rich in carbohydrates, the pancreas secretes mainly a carbohydrate-digesting enzyme called amylase.64

This mechanism is exceedingly sensitive, because enzymes must not be wasted, and at the same time, the intestine must not accidentally digest its own walls. This entire system must produce adequate enzymes to keep a living body alive. Were this process under our conscious control, we would spend all our time calculating when, which, and how many enzymes needed to be produced and pondering about to make use of them. However, their production and operation are actually beyond our control and knowledge. Other structures—again consisting of fat and proteins—are charged with controlling enzyme production. Hormones specially manufactured in the intestinal wall, secretin and pancreozymin, take on the job of stimulating enzyme production. The hormone secretin stimulates the pancreas into secreting pancreatic juice, rich in the sodium bicarbonate that neutralizes acid. The hormone pancreozymin stimulates the production of enzymes by the pancreas.
When food passes from the stomach to the duodenum, secretin and pancreozymin are released into the bloodstream. Thanks to these hormones, the duodenum is protected from the destructive effects of hydrochloric acid. By way of the bloodstream, secretin and pancreozymin reach the pancreas and signal it to produce sufficient quantities of fluid rich in water, bicarbonate and digestive enzymes, which will protect the duodenum. These secretions, as already mentioned, reach the duodenum through the pancreatic duct.

The pancreas is an organ 6 inches in size, lying behind the stomach. Despite its small size, this organ performs the very important manufacture of pancreatic juice containing digestive enzymes. Every day the pancreas produces some 5 liters of this fluid, which contains countless factors essential for life.

The organ that sets the hormones in motion is the stomach—another organ consisting of fats and proteins. As its digestion continues, the stomach sends a message to the duodenum, as if it knew that the potentially dangerous foodstuffs are headed there next. It immediately begins secreting the needed hormones in question and releasing them into the bloodstream. At first glance, this would seem to be a risky business, because the blood travels through the entire body.

Therefore, these hormones need to know where they must carry their signal. But in fact, they transmit their message to the pancreas alone, without stopping off at any other cells. As evidence of the infinite detail within His creative artistry, Allah has created the molecular structure of these hormones to interact only with receptor molecules on the membrane of the pancreatic cells.

Two small molecules, quite unaware of one another's existence in the human body, communicate with each other, knowing what purpose they serve, their objectives, properties and duties. They never see one another, and have no idea what the human anatomy looks like or how large it may be. They need to have great intelligence and consciousness in order to communicate this way, to achieve a common objective. Of course, there is no point in looking for intelligence and consciousness in molecules with no eyes, ears or brain. The intelligence and consciousness apparent in the miraculous tasks performed by these substances belong to Allah, Who created the human body from nothing. One of the reasons in creating this miraculous detail is for people to perceive and reflect on this great truth, reported in these terms in the Qur'an:

It is Allah Who created the seven heavens and of the earth the same number, the Command descending down through all of them, so that you might know that Allah has power over all things and that Allah encompasses all things in His knowledge. (Surat at-Talaq: 12)

A computer image of the enzyme trypsin. The green parts indicate the enzyme's active site.

The pancreas's ability to manufacture enzymes according to the nature and quantity of incoming foodstuffs is another miracle all its own. The pancreas must know chemical formulae, establish what enzymes will digest which kinds of food, and engage in production accordingly. As a result of this controlled process, the pancreas sends to the duodenum its enzyme-rich fluid, containing four enzymes of vital importance to the body: trypsin, chymotrypsin, lipase and amylase. The first two, trypsin and chymotrypsin, break down protein into amino acids that later travel the whole body through the bloodstream and are used in tissue manufacture.

Amylase converts starch into simple sugars. Lipase breaks down fat droplets, converting them into fatty acids and glycerol. Thanks to enzymes' enormous speed, this is all completed in a very short time. Whether you consume a special meal ordered from a four-star restaurant or just a simple slice of bread, it all assumes the same appearance in the duodenum. The state of the food on your plate is completely different from how it winds up in the duodenum. Enzymes break it down, reduce its particles in size, eliminate wastes and separate the rest for the purpose of keeping your body alive.

Digestive Enzymes and Their Perfect Organization

When synthesized in the pancreatic cells, some enzymes are not yet in an active state. These become active only after passing through the intestinal tract. The chemical trypsin, one of the enzymes already mentioned, represents a potential danger to the body's cells. For that reason, it is secreted in an inactive form known as trypsinogen. The moment trypsinogen makes contact with the intestinal mucosa, the enzyme enterokinase secreted by the mucosa converts it into its active state. Trypsinogen is also activated by the trypsin that already exists. It is most important that these enzymes in pancreatic juice should not be active before they progress to the intestine, or else trypsin and other enzymes might digest the pancreas itself. Thus the cells that secrete the enzymes in question also release a substance known as a trypsin inhibitor, which prevents trypsin from going into action inside the cells that secrete it and in the pancreatic duct. Since trypsin can activate other enzymes, the trypsin inhibitor thus also prevents their activation.

These two enzymes—trypsin and its inhibitor—have no effect when secreted together. But once they reach the duodenum, they separate from one another just as if they had been ordered to do so. This division is very important to the digestive process, since the trypsin, suddenly released, starts breaking down proteins in the food reaching the duodenum. The moment and site these two substances separate is very exact. Were they to part company too early, trypsin would break down the pancreas itself. If they never separated, then food entering the body would not get digested. Yet they never fall into such errors. Every meal you consume is digested as a result of these two molecules knowing just when to separate from one another. This happens in exactly the right place and at exactly the right time. It is of course impossible for enzymes to be able to establish such timing by chance or under their own volition. An enzyme, another protein that inhibits it, the pancreas that manufactures them, the hormones that travel between them as messengers—plus all the molecules, other proteins and enzymes involved in these phenomena—cannot all be in the same place at the same time or act together in complete harmony by chance. It is impossible for even a single one of these to have formed by coincidence. Allah creates them all, and they are all in a constant state of obedience to Him.

What would happen if there were no trypsin inhibitor? Any failure of this mechanism to function could result in death. For example, when the pancreas suffers severe injury, or when a passage is blocked, a large amount of pancreatic secretions accumulates in the damaged area. That might make the trypsin inhibitor being insufficient to keep the enzymes, working together at very high speed, from digesting the whole pancreas in a matter of a few hours. The result would be shock, usually ending in death, or a lifetime of pancreatic deficiency.65

If the pancreas can't secrete enough fluid to ensure digestion, this of course presents a major problem. However, the body has taken a precautionary measure against this. In such an eventuality, the pancreas sends messages everywhere in the body in order to locate metabolic enzymes which, when it receives them from other regions of the body, it can convert into digestive enzymes. For the pancreas, this task is very different and more difficult, and since it must work harder, it enlarges. This enlargement does the pancreas no harm, though it does cause pain to the body, and the use of the body's metabolic enzymes for digestive purposes does mean a reduction in the functions of other organs. Dr. Edward Howell explains:

The pancreas must send message to all parts of the body looking for enzymes it can reprocess into digestive enzymes. It may even invade the warehouse of the precursors. In a pinch it will beg, borrow, or steal them. When it finds them it has work to do. Changing metabolic enzymes into digestive enzymes means extra work for the pancreas. It must get bigger, just as a muscle grows from more exercise. This enlargement may not harm the pancreas, but when it confiscates metabolic enzymes it punishes the whole body by depriving it of mechanics every organ and cell needs to carry on their process and functions. 66

Michael Behe is a professor of biochemistry at Lehigh University. In his book Darwin's Black Box, he described in full detail the complexity involved in the blood-clotting process and the systematic way that enzymes function, pointing to the complex and interconnected details in the clotting system as evidence of what he announced as "irreducible complexity." In the following passage, Behe describes another example of the human body's irreducible complexity: the importance of the pancreatic enzymes, one of the most valuable components of the digestive system:

Pancreatic enzymes, which have to digest a wide variety of protein foodstuffs, are among the most nonspecific of enzymes. Now, that would pose a severe health threat to the organism even greater than just an unregulated clotting cascade. For example, if the digestive enzyme precursor trypsinogen were mistargeted to the bloodstream, the potential for disaster would be very large. In the pancreas, misactivation of trypsinogen is prevented by the presence of trypsin inhibitor. In Miller's scenario one cannot plausibly suppose there to be a trypsin inhibitor fortuitously circulating in the plasma. If the mistargeted enzyme were accidentally activated, it would most likely cause generalized damage in the absence of a regulatory mechanism. It would not be a viable evolutionary intermediate. 67

Such a miraculous system, in which no error ever occurs and which functions so perfectly with its enzymes and the organs that manufacture them, is a blessing to constantly remind us of the existence of Almighty Allah. These reminders tell us that humans were not brought into being for no reason and that once they die, they will inevitably be confronted with the life of the Hereafter. If people have the wisdom and understanding necessary to draw conclusions from all this, then all the enzymes and other structures in their bodies will become means whereby they take a step closer to the mercy of Allah, and thus to Paradise. Allah has created all His works toward that end, and every miracle of creation will be a means whereby the person who understands it will attain the true path to the beauties in the Hereafter. People are tested in this way, as Allah tells us in the Qur'an:
We created man from a mingled drop to test him, and We made him hearing and seeing. We guided him on the Way, whether he is thankful or unthankful. (Surat al-Insan: 2-3)

Enzymes That Work for DNA

Enzymes are very special proteins that unfailingly identify which reaction they need to act on and where; and seemingly know how much they need to accelerate it. But perhaps the most interesting of all the enzymes that work in the body are those that work for DNA—and which also represent a major predicament for the proponents of the theory of evolution. Because these enzymes' existence totally does away with the theory's claims regarding chance, as we shall see in due course.

DNA is a giant molecule containing a data bank of 3 billion "letters." Every stage during the replication of this molecule is supervised by enzymes. If any error arises during the process, it is immediately corrected and the chain is checked again. It is scientifically obvious that such a conscious system could not come into being by chance.

One of the most interesting aspects of DNA enzymes is that they receive all their operational knowledge from DNA, but can also determine and repair any errors in that same DNA. As we know, the DNA molecule is capable of copying itself, but it does not perform this replication process on its own. Enzymes also become involved. The replication takes place, at Allah's choosing, by way of enzymes.

DNA is a giant molecule consisting of a data bank of 3 billion "letters." This molecule resembles a spiral staircase twisted into a helix shape. When replication first begins, the enzyme known as DNA helicase separates the two DNA strands like a zipper, at a rate of up to 1,000 nucleotide pairs a second.

During replication, the unwinding of the DNA helix is made possible principally by the harmonious acting of two DNA helicase enzymes. Each of these individual helicase enzymes runs along one strand of the helix to unravel it.

After the unwinding of the DNA helix, other enzymes begin reading the nucleotides three by three. Other enzymes that become involved with the reading of the nucleotides head for the two strands of the helix and determine whether there are any errors. Any flawed section they identify is broken off by the enzyme known as DNA nuclease. This break is then repaired by the enzyme ligase.

As it opens the zipper, DNA helicase suddenly stops at the points that represent the limits of the information required. (When a process is to be carried out in the cell, only that part of the DNA code concerning that process is copied.) The enzymes know how far the information extends and how far the DNA helix needs to be pried apart.

In principle, the unwinding of the DNA helix is made possible by two DNA helicase enzymes acting together. One runs along the leading strand template, while the other runs along the lagging strand template. Since the two strands have opposite polarities, these helicases must move in opposite directions on the DNA strand, for which reason they are "different" enzymes. Both types of DNA helicase are present within the cell.68

Once the appropriate DNA region has been found, other enzymes that attach to that region begin reading the nucleotides three by three. The reason for this is that the information is encoded in triple nucleotide strings. (Nucleotides are the constituent bases of the DNA nucleic acid and are known by the names of adenine, thymine, guanine and cytosine.) Millions of nucleotides all joined to one another are constantly read by the enzymes, and this whole process takes less than a second.

However, the enzymes that will read and copy the four kinds of nucleotides in DNA—adenine, thymine, guanine and cytosine—are made up of amino acids. Therefore, how an enzyme communicates with the DNA helix, and how the nucleotides and amino acids understand one another, is something truly extraordinary, since we are looking at two totally different structures. There is no molecular similarity here to permit a lock-and-key type of compatibility. In molecular terms, therefore, it would seem very hard for them to establish a connection. However, a solution to this has also been created within the body. The enzymes are easily able to read the codons on the DNA and understand what these codons express. (A codon is a tri-nucleotide sequence of the code written from the DNA to the mRNA, or messenger RNA. Codons are found in the mRNA molecule.)

This can mean only one thing, of course—that the amino acids and nucleic acids were all created by a single Creator at exactly the same time. The way that the amino acids constituting the enzymes recognize the nucleotides, can resolve the codes they contain and use this to perform the vital function of DNA replication can only be explained by their all being under the control of a single Will. Like everything else that exists, they too are the works of Allah. Leslie E. Orgel is one of the most dyed-in-the-wool modern evolutionists. Yet even he had to admit that these two structures could not have evolved by chance:

It is extremely improbable that proteins and nucleic acids, both of which are structurally complex, arose spontaneously in the same place at the same time. Yet it also seems impossible to have one without the other. And so, at first glance, one might have to conclude that life could never, in fact, have originated by chemical means.69

Once the error has been corrected, DNA polymerase completes both strands of the helix with a second strand, and thus enables two separate DNA helixes to form. To do so, it finds and collects the data corresponding to that constituting each strand of the DNA. When copying is completed, DNA polymerase again checks the chain from start to finish. During all these stages, helix-stabilizing enzymes keep the DNA stable. The newly formed strands are tracked along by the enzyme editase to assure that the nucleotides have been correctly paired. By the end of that checking process, a second brand-new DNA chain has emerged.

Following the unwinding of the DNA strands, other enzymes immediately flock to the DNA and begin scanning it. If during this scanning process, they detect any "error" in the DNA they immediately correct it. The faulty part of the damaged DNA strand is identified and torn out by an enzyme known as DNA nuclease. A gap thus appears in the DNA helix.

When the flawed section has been done away with, DNA polymerase enters the equation. This enzyme completes each of the two separated DNA strands with a second strand, so that two separate DNA helixes are formed. In stages it checks whether or not they match the bases on the other side. In order to do so, it brings in data corresponding to those data that comprise the original DNA strand. It separates flawed base molecules and replaces them with new ones. To put it another way, it copies 3 billion separate letters in a completely flawless manner. In addition, DNA polymerase checks all these different stages twice, never departing before the second checking process has been carried out. At the same time, another polymerase enzyme completes the other half of the DNA. As all this goes on, helix stabilizing enzymes cling on to the ends to prevent the two strands of the DNA helix from winding round one another again. Yet another enzyme intervenes in the renewed section to ensure that the correct, newly installed base is firmly in place.

The enzyme editase, which enters the scene in the wake of all these stages, again checks the separated part and checks the revisions that have been made. Once that has been performed, an identical copy of the original DNA is complete.

The correction process does not end here, however. You'll recall that there was a break in the DNA strand where the correction was performed. This break is repaired by the enzyme DNA ligase. This repair is exceedingly important, since if any error occurs during such a vital process as DNA replication, the codons in the new nucleotide sequences will be disordered. With one missing nucleotide, all the codons read in triplicate will change, and as a result, molecules will be produced that mean nothing to the organism and the living body in question will start to die.

Another important enzyme works inside this extraordinary system during the synthesis of RNA from DNA. Instead of checking for incorrect and wrongly copied bases in RNA and extracting them one by one, this enzyme cuts base sequences out from the region like a pair of scissors, by identifying regions in which bases have been set out incorrectly. If this cutting process takes place in several regions simultaneously, instead of in one only, the DNA strand will begin to fall apart. To prevent this, the cell dispatches another enzyme to the region. This enzyme brings the divided DNA strands back together again and joins them up.70

Enzymes, with their enormous working capacity, result in perfect replication of DNA. This phenomenon is constantly taking place at great speed in every cell in the human body. Each and every day, in fact, some 20,000 repair processes are carried out in every one of the human body's 100 trillion cells.71

The enzymes that work to replicate DNA operate as quickly as permitted by the great care they take. In a striking way, enzymes working on DNA determine their speed according to the reactions they must perform. For example, DNA polymerase completes only some 10 or so bases a second. This rate is fairly slow, compared to enzymes such as catalase, which breaks down 5 million hydrogen peroxide molecules a second. This speed is determined by the quantity of copy DNA required by the body. The cell establishes its requirement, and the enzymes work in line with that production rate. At some places in the body, enzymes literally have to work approaching the speed of light, because where they operate, what counts is speed. The faster they complete their reactions, the better the body will be able to remain healthy.

1. The enzyme DNA nuclease checks all the pairs in the DNA chain for any mistakes. 2. Upon detecting a mistake, it immediately removes the incorrect chemical. 3. A third enzyme, DNA ligase, detects the broken strand and arrives at the site. 4. Using the appropriate materials, it repairs the detached part. 5. At this point, the enzyme DNA polymerase completes both strands of the helix with a second one. 6. It checks the helix one last time and thus form two helices.

Production of the enzymes that work for DNA is another controlled process. A large number of enzymes are involved in DNA replication, but their use and production are carried out economically. Again, the DNA itself controls this. An on/off switch on the DNA (repressor gene) keeps production under control. The switch is kept normally in an "off" position, until the need for an enzyme arises.72

Even a small electron exchange taking place in the body is important, and the results are very great. Every reaction must take place in a controlled manner. Every reaction requires a division of labor, and the involvement of countless enzymes all acting together. The duties and speed of each one, and the molecules they will act upon, must all be predetermined. Each enzyme must constantly strive to keep the cell healthy and never make a mistake. So who makes all these determinations? Who controls these and ensures that they are free of error? Who can program them in such a way as to keep such a complex mechanism as the human body alive and healthy? Who can maintain the interdependency in this giant system consisting entirely of tiny molecules?

It is Almighty Allah Who does and creates all this.

If a person can realize all this perfection in his own body and has the ability to comprehend it, then he will clearly see the existence of Almighty Allah, our Creator. It is He Who creates us, everything we have, and all entities on the Earth and heavens. Nothing is independent of Allah. Every living cell we examine is flawless because it acts under the direction of Allah. And because they are under His control, they demonstrate such abilities and extraordinary properties. It is a grave error and terrible ingratitude for anyone to ignore all this and imagine himself an independent entity, a miracle of coincidence, while in reality his entire being is in complete obedience to Allah. Even if some insist on ascribing this sublime creation to chance, every enzyme in their bodies, every protein and every electron exhibit harmony with the system determined for them by Allah and constantly take their inspiration from Him. This fact is also imparted in verses from the Qur'an:

Everyone in the heavens and Earth belongs to Him. All are submissive to Him. It is He Who originated creation and then regenerates it. That is very easy for Him. His is the most exalted designation in the heavens and the earth. He is the Almighty, the All-Wise. (Surat ar-Rum: 26-27)

... everything in the heavens and Earth belongs to Him. Everything is obedient to Him. (Surat al-Baqara: 116)

And He has made everything in the heavens and everything on the Earth subservient to you. It is all from Him. There are certainly signs in that for people who reflect.
(Surat al-Jathiyya: 13)

Allah is He Who splits the seed and kernel. He brings forth the living from the dead, and produces the dead out of the living. That is Allah, so how are you perverted?
(Surat al-An‘am: 95)

Are Enzymes the Source of DNA, or the Other Way Around?

The question of DNA and enzymes working for DNA constitutes one of the greatest impasses confronting evolutionists. The "irreducible complexity" posing such a dilemma for evolutionists will be encountered again during the course of this section. DNA, one of the cell's most complex structures, and enzymes, some of the body's complex proteins, work together in a system in which neither can be separated from the other. It is impossible to remove even a single component from the complex system in which they participate and claim that some parts "evolved" before others.
As described in the previous section in some detail, DNA needs enzymes for the replication process. Yet at this stage, something very interesting arises. For the enzymes that enable DNA replication to come into being—which enzymes monitor the DNA at every stage, then correct any errors and check the DNA again from beginning to end—the necessary production information should already exist in DNA. Enzymes are proteins manufactured under DNA's control, according to the information encoded in that DNA. In other words, enzyme synthesis is impossible without DNA. On the other hand, in the absence of enzymes, the chemical reactions to produce the sugar ribose, the "backbone" of DNA and RNA, cannot take place. To put that another way, DNA synthesis in turn is impossible in the absence of enzymes.73 DNA is essential for enzymes to exist, and vice-versa.

This fact presents a severe disappointment to evolutionists. The precondition of the emergence of two complex systems is an even worse problem for the theory of evolution, which is unable to account for either one. Even if we accepted the impossible claim that DNA did emerge first, as the result of chance, we would also have to accept that it then waited for the development of those enzymes that would enable it to be copied—again by chance. Yet clearly, any DNA that had to wait so long to be replicated could be of no use to a living organism. Even if we believed another impossibility—that enzymes came into being, again by chance, before DNA, then we'd also be forced to accept that enzymes as yet had no data bank to store their production data and characteristics. Under these conditions, even if an enzyme did appear (despite all the impossibilities), it would still be impossible for any more to be produced. Therefore, the DNA-enzyme relationship constitutes an inseparable whole: The two have to co-exist together.

Evolutionists cannot offer any explanation as to what came into existence and how in our DNA-based life. These fundamental components display a truly irreducible complexity that must have existed ever since their beginning. Charles McCombs, an organic chemist from California University, states that there can be no evolutionary history behind DNA and DNA enzymes:

If the repair mechanism evolved first, what use is a repair mechanism if DNA has not evolved yet? If DNA evolved first, how would the DNA even know it would be better off with a repair mechanism? Can molecules think? DNA is not a stable chemical molecule, and without a repair mechanism, it would easily deteriorate by chemical oxidation and other processes. There is no mechanism to explain how DNA could exist for millions of years while the repair mechanism evolved. DNA would just decompose back into pond scum before the alleged billions of random chance mutations could ever form the repair mechanism. 74

It's of course out of question that two molecules might evolve together. Yet recall that evolutionists still can't explain the emergence of even a single DNA molecule or a single enzyme. Evolutionists will never be able to explain this because a chance emergence of an enzyme independently of DNA, or of DNA independently of enzymes, or even of a single enzyme or protein constituting DNA, is impossible.

The DNA-and-enzyme dilemma, which makes all claims regarding evolution totally irrelevant, is greeted with great astonishment by evolutionists. The American evolutionist biologist Frank B. Salisbury, whose articles appear in the American Biology Teacher magazine, admits the impossibility of any evolutionary explanation:

Surely our ideas about the origin of life will have to change radically with the passage of time. Not only is the gene itself a problem: think of the system that would have to come into being to produce a living cell! It's nice to talk about replicating DNA molecules arising in a soupy sea, but in modern cells this replication requires the presence of suitable enzymes. Furthermore, DNA by itself accomplishes nothing. Its only reason for existence is the information that it carries and that is used in the production of a protein enzyme. At the moment, the link between DNA and the enzyme is a highly complex one, involving RNA and an enzyme for its synthesis on a DNA template; ribosomes; enzymes to activate the amino acids; and transfer-RNA molecules… It's as though everything must happen at once: the entire system must come into being as one unit, or it is worthless. There may well be ways out of this dilemma, but I don't see them at the moment.75

Duane T. Gish, president of the Institute of Creation Research, also states that there can be no evolutionary history when it comes to the subject of DNA and DNA enzymes:

As a matter of fact, even though the many metabolic activities found within a living cell are absolutely indispensable for its existence, and these activities are in turn almost totally dependent upon enzymes, the existence of enzymes before living things existed would have been disastrous. Let us suppose that a proteolytic enzyme [protease], that is, an enzyme that catalyzes the hydrolysis or breakdown of protein, somehow arose in the hypothetical "primordial soup" of the primeval world. Its origin would have been totally disastrous, for it would have happily set about catalyzing the rapid destruction of all protein in sight, and soon there would be no protein left. Similarly, RNases [ribonuclease] would destroy all the RNA, DNases would breakdown all the DNA, deaminases would deaminate all amines, decarboxylases would decarboxylate all carboxylic acids, etc. How could such substances be "selected for" when their presence outside of the regulated environment of a living cell would have been destructive?

By no stretch of the imagination, then, could natural selection have had anything to do with the origin of life. ... the origin of life by naturalistic, mechanistic process is totally impossible. 76

Despite his being an evolutionist, Caryl P. Haskins, director of the Washington Carnegie Institute, openly admits that it is impossible for these two interdependent complex systems to have evolved by chance:

But the most sweeping evolutionary questions at the level of biochemical genetics are still unanswered. How the genetic code first appeared and then evolved and, earlier than that, how life itself originated on earth remain for the future to resolve . . . The fact that in all organisms living today the processes both of replication of the DNA and of the effective translation of its code require highly precise enzymes and that, at the same time the molecular structures of those same enzymes are precisely specified by the DNA itself, poses a remarkable evolutionary mystery . . . Did the code and the means of translating it appear simultaneously in evolution? It seems almost incredible that any such coincidence could have occurred, given the extraordinary complexities of both sides and the requirement that they be coordinated accurately for survival. By a pre-Darwinian this puzzle would surely have been interpreted as the most powerful sort of evidence for special creation.77

Two complex structures are under discussion here. Evolutionists have not been able to explain the formation of enzymes, much less how the amino acids comprising an enzyme combined in the correct sequence to produce a protein. They have not even attempted to address the issue of DNA's origin. The fact that these two complex structures behave in such a way as to remind us of the question of the chicken and the egg—the way the one is responsible for the production of the other—represents a major difficulty placed at evolutionists' door by scientific progress.

This is actually one of the finest lessons that the science of microbiology can give evolutionists, who seek to offer an explanation other than creation for all the complex systems they encounter, and who propose exceedingly illogical and inconsistent claims on the subject. Evolutionists have no theory to suggest regarding the formation of both DNA and enzymes, nor any fictitious mechanisms to propose. They are dealing with an incomparable, astonishing and literally extraordinary miracle of creation. Clearly, both DNA and enzymes have been sited in just the right place in the cell for their separate functions and interdependent attributes. There can be no other explanation for this than creation.

Allah sees a single nucleotide in a DNA helix, a single atom it contains and every electron moving at a speed of thousands of miles a second, at every moment, and monitors and controls them all. Everything acquires a perfect complexity by Allah's choosing. Systems operate because that is Allah's will. Human beings remain alive because Allah so wishes. It is Allah Who knows every process taking place in every cell of every human being who has ever lived. It is Allah Who controls and creates out of nothing the thousands of processes taking place in the cell, the molecules involved in these processes and all the minute components that comprise them. That is why those who look for an explanation other than creation are constantly in a hopeless position. They themselves are also aware that they can offer no other explanation for all the things that Allah has created by commanding them to "Be!" Allah tells us of His boundless might in a verse:

The Originator of the heavens and Earth. When He decides on something, He just says to it, "Be!" and it is. (Surat al-Baqara: 117)

The Enzymes That Control RNA

RNA, or ribonucleic acid, is a large molecule that, like DNA, consists of consecutive nucleotides. However, different from DNA, it is single stranded and uses uracil instead of thymine present in DNA. By working together with DNA, RNA plays a role in the synthesis of enzymes.

For protein synthesis in the cell, the relevant DNA sequences coding for that specific protein are copied from the DNA. However, these sequences may sometimes lie in several distinct segments along the DNA, and unwanted intervening parts may also be copied. The region shown in red above is a DNA region of such unwanted data. In order for the correct protein to be manufactured, it needs to be removed from the sequence.

At this point enzymes known as "spliceosomes" become involved and start bending the chain being copied in such a way that the intervening sequences are looped out.

By the end of this process, the looped out region has been excised. The coding data are added on to one another, and taken to the cell factory for manufacture.

For any process in our bodies—all the chemical reactions for the formation of a single growing hair, for example—the requisite enzymes have to be produced. Messages are therefore transmitted to that part of the DNA where enzymes are to be produced. Since DNA and RNA perform enzyme production together, RNA synthesis must also take place in that site where the message goes. In order for that to happen, it's essential that the DNA should assume an active state, that the RNA should be exported from the nucleus into the cytoplasm, and that enzymes should be synthesized. Again, all the different stages in the synthesis of RNA are controlled by other enzymes. One of those manufactured, adenosine triphosphatase (or ATPase) establishes the use of ATPs, while another directs the ATPases to the proper location. Meanwhile, thousands of other enzymes carry out thousands of other reactions through similar stages in order to keep the cell alive. Yet one very important point needs to be emphasized: RNA is synthesized for enzyme production, yet it is enzymes that synthesize RNA!

RNA molecules brought into being by genes in the cell nucleus act as templates upon which enzymes are formed. If a living organism is born with a defective gene or if one of its genes is missing, that means the RNA molecule is incomplete, and that some enzymes have not formed in the cell. Therefore, those reactions dependent on the enzyme that's not been manufactured fail to occur, and the organism is defective. If the enzymes and reactions they perform are vital, the organism will inevitably die.78

Enzymes are manufactured by RNA, but RNA needs the enzymes themselves in order to be able to manufacture enzymes and correct errors in them. In other words, the same thing applies to RNA as applies to DNA; this system works just as with DNA. When a protein needs to be manufactured in the cell, an enzyme known as RNA polymerase travels to the DNA, the cell's data bank. It finds the data concerning the protein to be manufactured and makes a copy of them. Sometimes, however, the data regarding the protein to be produced may be dispersed in different regions. Under such circumstances, the RNA polymerase copies the entire region—from where the data begin to where they come to an end. In doing so, the enzyme also copies sequences that serve no immediate purpose. The presence of unnecessary data will lead to the production of a different, useless protein. In order to prevent this, a new enzyme known as spliceosome enters the equation and removes the non-coding intervening sequences from among hundreds of thousands of pieces of data, then joins together the chains necessary for the manufacture of the protein.

At this point, the tRNA codon (transfer RNA: a small RNA chain that transports amino acids to the ribosome for protein synthesis) must be attached to the correct amino acid. There is at least one kind of tRNA for each of the 20 amino acids.79 If this vital stage in DNA replication does not function properly, then the DNA sequence will be damaged and be functionless. A special enzyme, aminoacyl tRNA synthetase, is responsible for attaching the proper amino acid to the tRNA. During this process it has to be ensured that every tRNA carries the correct amino acid, and that none of the other 19 amino acids are affected. Since the enzyme in question works without error, these risks in the copying of DNA are totally eliminated.80

The dilemma in DNA replication also emerges in RNA replication. The proteins that permit RNA copying are, again, enzymes produced by RNA. It is therefore impossible to speak of enzymes in the absence of RNA, and vice-versa. Accordingly, evolutionists face insoluble problems regarding how RNA polymers can replicate in the absence of proteins.81 RNA's particular enzymes must be working at full capacity, and with all their functions, from the moment that RNA comes into being. Yet at the same time, those enzymes have to be manufactured by RNA. Evolutionists are unable to account for this contradiction, or to explain how even one of these structures might have come into being by chance. Will they suggest that two basically different molecules that cannot operate independently of one another came into being accidently and for no reason, at exactly the same moment, and that they located one another and began working together—again by chance? Can any scientist who spent years training in laboratories and who knows this system down to the finest details make such a claim? To make such an unscientific, irrational claim solely in order to be able to deny the fact of Allah's creation would thoroughly discredit any such scientist.

Eyesight cannot perceive Him but He perceives eyesight. He is the All-Penetrating, the All-Aware. (Surat al-An‘am: 103)

For that reason, adherents of the theory of evolution are unwilling to advance such claims openly. Rather, they seek to disguise everything under a scientific mask, but also fail in that. The evolutionist Leslie E. Orgel is one of those who have had to admit this manifest impossibility:

We proposed that RNA might well have come first and established what is now called the RNA world... This scenario could have occurred, we noted, if prebiotic RNA had two properties not evident today: a capacity to replicate without the help of proteins and an ability to catalyze every step of protein synthesis.82

Here, Orgel is referring to an imaginary process such as evolution producing RNA, together with enzymes. In that fictitious process, however, it is impossible for even one of the components of these complex structures, let alone the structures themselves, to come into being by chance.

So perfect is Allah's creation that even if all the humans in the world joined forces, they still could not produce a single cell. They can propose no alternative explanation to Allah's creation. A system in which RNA cannot exist without enzymes, and enzymes cannot exist without RNA, is one of the indisputably finest examples of this perfection.

In the Qur'an, Allah tells us that He is the Creator of all things:
Among His signs is the creation of the heavens and Earth and all the creatures He has spread about in them. And He has the power to gather them together whenever He wills. (Surat ash-Shura: 29)