ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Genetic code. Conceptual computer artwork representing the sequences that make up the genetic code. There are four types of nucleotide base in a DNA (deoxyribonucleic acid) molecule; adenine (A), guanine (G), cytosine (C) and thymine (T). These form complementary pairs which link the two sugar-phosphate strands of the DNA together, forming a double helix. The ordered sequence of the pairs, arranged in discrete segments known as genes, determines the genetic code. The code contains the instructions which control and transmit an organism's hereditary traits.
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