SAT Subject Biology Practice Question 159: Answer and Explanation

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Question: 159

9. Human immunodeficiency virus (HIV) is a retrovirus that integrates its own DNA into a host cell's genome using

A. DNA polymerase
B. helicase
C. primase
D. ligase
E. reverse transcriptase

Correct Answer: E


Reverse transcriptase is an enzyme used to transcribe RNA sequences to DNA sequences. Its function is the reverse of the transcriptase that produces mRNA from DNA.

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