Question

9. How do viruses such as HIV enter an animal cell?
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Answer 1

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Answer 2

Answer: it first attaches to and fuses with the host cell.

Step-by-step explanation:

Retroviruses also have the enzyme reverse transcriptase, which allows it to copy RNA into DNA and use that DNA "copy" to infect human, or host, cells. When HIV infects a cell

so the answer is that it first attaches to and fuses with the host cell.