DNA Molecule
DNA Molecule

The DNA molecule is one of the greatest scientific discoveries of all time. DNA molecule is comprised of chemical bases arranged in approximately 3 billion precise sequences. Even the DNA molecule for the single-celled bacterium, E. coli, contains enough information to fill an entire set of Encyclopedia Britannica

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DNA
DNA (deoxyribonucleic acid) is a double-stranded molecule that is twisted into a helix like a spiral staircase. Each strand is comprised of a sugar-phosphate backbone and numerous base chemicals attached in pairs. The four bases that make up the stairs in the spiralling staircase are adenine (A), thymine (T), cytosine (C) and guanine (G).
DNA Code
DNA Code
The DNA code, like a floppy disk of binary code, is quite simple in its basic paired structure. However, it's the sequencing and functioning of that code that's enormously complex. Through recent technologies like x-ray crystallography, we now know that the cell is not a "blob of protoplasm", but rather, a microscopic marvel that is more complex than the space shuttle.
DNA-Helix
DNA-Helix
The two strands of the double helix are anti-parallel, which means that they run in opposite directions. The sugar-phosphate backbone is on the outside of the helix, and the bases are on the inside. The backbone can be thought of as the sides of a ladder, whereas the bases in the middle form the rungs of the ladder. Each rung is composed of two base pairs. Either an adenine-thymine pair that form a two-hydrogen bond together or a cytosine-guanine pair that form a three-hydrogen bond. The base pairing is thus restricted.
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