Autonomous Retrotransposons Are Segments of DNA That Encode Specialized Enzymes

Autonomous retrotransposons are segments of DNA that encode specialized enzymes.  These enzymes allow autonomous retrotransposons to move between different regions of a host genome via RNA intermediates using mechanisms similar to those of retroviruses.  Some autonomous retrotransposons are segments of retroviral DNA that have been partially inactivated by mutations.  Given this, which of the following mutations would most likely convert active retroviral DNA into an autonomous retrotransposon?

A) A mutation that prevents the expression of functional reverse transcriptase
B) A mutation that prevents integration of retroviral DNA into the host genome
C) A mutation that prevents the expression of envelope proteins
D) A mutation that prevents RNA polymerase from transcribing retroviral DNA

Correct Answer:

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