30.0 MB (7.4 MB compressed)
3618 x 2897 pixels
30.7 x 24.6 cm ⏐ 12.1 x 9.7 in (300dpi)
DR GOPAL MURTI / SCIENCE PHOTO LIBRARY DR GOPAL MURTI / SCIENCE PHOTO LIBRARY
DNA replication. Coloured transmission electron micrograph (TEM) of a molecule of DNA (deoxyribonucleic acid) replicating. DNA is composed of two strands twisted into a double helix. Before replication the strands separate from each other (as seen here), forming a replication fork. Each strand then acts as a template for the formation of a new DNA molecule. This is known as semi-conservative replication as each new molecule retains a strand from the parent molecule.
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