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Anonymous
Anonymous asked in Science & MathematicsBiology · 1 decade ago

The structue and code of the DNA molecule?

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  • Sabine
    Lv 6
    1 decade ago
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  • 1 decade ago

    DNA, or deoxyribonucleic acid, has an elegantly geometric structure that allows it to play its crucial role as the chemical carrier of an organism's genes. Each DNA molecule is made up of two very long polymers connected by the bonding of hydrogen atoms and coiled in the shape of a double helix. Each of the two polymers contains many structures called nucleotides, which, in turn, may be further broken down into three parts: deoxyribose (a five carbon sugar), a phosphate group, and a nitrogenous base. There are four different nitrogenous bases that might be present: thymine, cytosine, adenine, and guanine. These four bases are the foundation of the genetic code. Sometimes represented as T, C, A, and G, these chemicals act as the cell's memory, instructing it on how to synthesize enzymes and other proteins. These four nucleotides encode everything an organism needs to live and protects this information with incredible accuracy. In a human being, each cell holds 46 separate DNA molecules, each containing, on the average, about 160 million nucleotide pairs, yet this massive amount of information is stored and replicated almost flawlessly.......http://library.thinkquest.org/20465/DNAstruct.html

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  • 1 decade ago

    The structure of the DNA moleculs is a "double helix" like a spiral staircase.

    Source(s): Biology class
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