DNA

Script: Ama-chromosomes e-zygote awu 46 amele ingxenye yokuqala yesifanekiso sofuzo somuntu omusha. Le sakhiwo sihlala kumamolikuli athothene okuthiwa yi-DNA. Inemiyalelo yokukhula komzimba wonke.

Amamolikuli e-DNA anjengesikhwelo esisontekile okwaziwa njenge-double helix. Amaqophelo esikhwelo enziwe ngamamolikuli angamabili, okuthiwa yi-guanine, cytosine, adenine, ne-thymine.

I-guanine ihambisana kuphela ne-cytosine, i-adenine ihambisane ne-thymine.