DNA. Computer graphic representation of a part of a strand of the beta form of deoxyribonucleic acid (DNA). A DNA molecule is composed of two interwound complimentary strands twisted into a helical shape,the famous 'double helix'. Each strand alternates a sugar group with a phosphate group. The two strands are cross-linked by pairs of bases,of which there are four types. Each pair of bases is linked by hydrogen bonds. The key to DNA's ability to replicate is that base pairing is specific: adenine always bonds with thymine and guanine always to cytosine | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wilson, Jon |
Taille de l’image : | 3459 px × 5173 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |