RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY
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DNA replication. Computer illustration showing a vertical slice through a DNA (deoxyribonucleic acid) molecule that is being unwound to create two new identical daughter molecules (upper left and right). The DNA double helix separates into its two strands. Each strand then acts as a template for the formation of a new DNA molecule. This is known as semiconservative replication. DNA contains sections called genes, which encode the body's genetic information.
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