(c) single-stranded RNA
Humans carry double-stranded DNA as a carrier of genetic material.
Retroviruses contain the enzyme reverse transcriptase.
This allows retrovirus to copy RNA into DNA.
This DNA "copy" infects the humans, host, or its cells. First, when HIV infects a cell, it fuses with the host cell.
Then, the viral RNA converts into DNA and the virus uses the host cell's machinery to replicate itself.
After this, the new copies of HIV then leave the host cell and move on to infect other cells.
