DNA nucleotides,computer artwork. Section of a double stranded DNA (deoxyribonucleic acid) molecule showing the molecular structure of guanine (G) and cytosine (C) bonded together. DNA is composed of two strands twisted into a double helix. Each strand consists of a sugar-phosphate backbone (far left and right) attached to nucleotide bases (centre left and right). There are four bases: adenine,thymine,guanine and cytosine,which join together with hydrogen bonds (centre). Thymine always pairs with adenine,and guanine always with cytosine | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Leroy, Francis / Biocosmos |
Bildgröße: | 5000 px × 3548 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |