DNA replication,computer artwork. DNA (deoxyribonucleic acid) is composed of two strands of nucleotides (red) twisted into a double helix. Before replication the strands are separated by a helicase enzyme,with each strand acting as a template for the formation of a new DNA molecule. The templates are 'read' by DNA polymerase enzymes that travel along the strands matching complementary nucleotides to the templates to build up the 2 new DNA molecules. The leading strand is read in the 3'-5' direction and the lagging strand is read 5'-3'. In step II a ligase enzyme completes the replication process | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Leroy, Francis / Biocosmos |
Bildgröße: | 5000 px × 3521 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |