DNA is a long chain-like structure formed by alternating molecules of phosphoric acid and deoxyribose. Each molecule links four substances (adenine,thymine,cytosine,guanine). Each DNA molecule forms a chromosome. The two spiralling chains form a helix. Genes transmitted from generation to generation are different sequences of nucleic acids on the chromosome | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Kinsman, Edward |
Taille de l’image : | 3000 px × 4500 px |
Model Release : | Non requis |
Property Release : | Non requis |
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