DNA replication,illustration

Numéro d’image : 12894793
DNA replication,illustration
DNA replication,illustration. Strand of DNA (deoxyribonucleic acid) splitting (centre left) and forming two identical copies (right). DNA consists of two strands (blue) of sugar phosphates forming a double helix (spiral). The two strands are held together by bonds between their nucleotide bases (coloured bars). There are four nucleotide bases,but they pair in only two combinations (here,pink-yellow and green-orange): guanine to cytosine,and thymine to adenine. Hence each DNA strand is a complementary copy of the other. As the original strand splits,this complementary base chemistry causes a reverse copy to assemble next to each half,reforming the original DNA strand. This is known as semi-conservative replication. The nucleotide base sequence is the genetic code. DNA,which is stored in cell nuclei,is the genetic material that controls the growth and development of all living organisms.
Licence : Droits gérés
Crédit: Science Photo Library / Jensen, Mikkel Juul
Taille de l’image : 8048 px × 4343 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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