The most important means of communication between individuals and generations is with words, which are represented by letters. English is a language written with 26 letters, in other words a code of 26 symbols. These symbols form words, and words form sentences. This code enables the communication and storage of information.
The language of the cell is similar: All of a human being's physical features have been codified and stored in the nucleus of the cell, where the cell can refer to again by using this code. This code is the language of the director molecule, the DNA, formed from four special bases called nucleotides, each represented by one of the letters A, T, G, and C. These bases, by coming together one after the other in a meaningful manner, form the DNA molecule (Figures 2.2 and 2.3).
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1. Sugar-Phosphate
2. Hydrogen Bonds |
3. Base
4. Length of one complete twist of DNA 3.4nm =0.000034mm |
Figure 2.2
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Information in the nucleus' data bank is stored in this way. In the interests of simplicity when explaining the cell's information coding system, we'll keep using these letters to represent the nucleic acid molecules making up DNA.
These letters form opposite pairs and form one rung of the ladder. These rungs are joined together to form genes. Every gene, which is just one section of the DNA molecule, controls a particular feature in the human body. Innumerable characteristics such as height, eye color, and shape of nose, ears, and skull come about via commands given by the relevant genes. We can compare these genes to the pages of a book, which bears various writings made up from the four letters A, T, C and G.
In the DNA of human beings are found about 200,000 genes, each made up of between 1,000 and 186,000 nucleotides, which come together in different orders depending on the corresponding protein they make. These genes contain the codes for approximately 200,000 different proteins with various duties in the body, the production of which is again controlled by genes.
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Figure 2.3
The arrangement of the adenine, thymine, cytosine, and guanine bases in DNA. The bases are paired to each by hydrogen bonding, and the order of the base pairs makes up the language of life. |
Yet the amount of information contained in these 200,000 genes represents only about 3% of the total information contained in DNA. The remaining 97% has remained a mystery to this day. Recent research has shown that this mysterious remaining 97% contains vital information about mechanisms that facilitate highly complex activities, and information about how the cell continues its existence. However, scientists still have a long way to go.
Genes are found within chromosomes. There are 46 chromosomes in each cell in the human body (excluding the generative cells; see Figure 2.5). Comparing each chromosome to a volume comprised of genes, then we can say that in each cell there is a 46-volume cellular encyclopedia that contains all the information relevant to human beings. Using our earlier analogy, this is equivalent to the amount of information stored in a 920-volume Encyclopedia Britannica.
In each person's DNA, the order of the letters is different. This is why all the people who have ever lived have been different from each other. Each human being's basic anatomical structure and processes are the same. But despite the fact that each person arises from the division of just one cell and possesses the same basic structure, each individual is uniquely created, with such fine differences and with such detail that there have been billions of distinctly different people.
All the organs in your body are built according to a planning scheme outlined in your genes. To give a few examples from a gene map constructed by scientists, the skin is regulated by 2,559 genes; the brain by 29,930; the eyes by 1,794; salivary glands by 186; the heart by 6,216; the breast by 4,001; the lungs by 11,581; the liver by 2,309; the intestines by 3,838; the skeletal muscles by 1,911 and the blood cells by 22,092 genes.
The order of the letters in the DNA determines the structure of any human being, down to the smallest detail. In the DNA of just one cell are found characteristics like height, eye, hair and skin color, the plans of 206 bones, 600 muscles, 10,000 auditory and 2 million optical nerve networks, 100 billion nerve cells, and blood vessels 100,000 kilometers (60,000 miles) long and 100 trillion cells.
If even one single letter cannot come about without a scribe to write it, then how can billions of meaningful "letters" arise inside a human cell? How did these letters come together, one after the other, in meaningful patterns to comprise the plan of a unique and complex human body? Were there even the slightest flaw in the order of these letters, you could find your ear where your stomach is supposed to be, or your eyes on your heels, and have to live as a freak. The secret of your being a regular person is the faultless order in which the billions of letters are arranged in your DNA's 46-volume encyclopedia. Obviously, these letters can't possibly realize such an arrangement of their own accord. These genes, which we have been calling letters, have been created by God, the Master of superior intelligence and infinite knowledge. This extraordinary arrangement, which renders the word "coincidence" meaningless, is a result of God's perfect creativity:
He is God-the Creator, the Maker, the Giver of Form. To Him belong the Most Beautiful Names. Everything in the heavens and Earth glorifies Him. He is the Almighty, the All-Wise. (Qur'an, 59:24)