Answer:
D.4 genetically different cells
Explanation:
C. a toy train is the item that has characteristics similar to a scientific model.
The role of 3tc in inhibiting hiv reproduction is to interfere with enzyme trancriptase since it has a similar shape to the c nucleotide of DNA.Reverse trancriptase pick up 3tc molecule which led to termination of DNa further thus block reproduction of HIV.
