DNA strands. Computer illustration showing the structure of double stranded DNA (deoxyribonucleic acid) molecules. DNA is composed of two strands twisted into a double helix. Each strand consists of a sugar-phosphate backbone (curved) attached to nucleotide bases. There are four bases: adenine, cytosine, guanine and thymine. DNA contains sections called genes that encode the body's genetic information. | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / KEITH CHAMBERS |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |