A strain of HIV has a mutation that causes its tat protein to be somewhat more able to bind to RNA.The most likely result is that

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The tat protein in HIV enhances the transcription of viral RNA by promoting RNA polymerase II's processivity. A mutation that increases tat's ability to bind RNA would likely result in fewer partial transcripts being terminated, thus allowing more complete transcripts to be made.

A Strain of HIV Has a Mutation That Causes Its