AP Biologymediummcq1 pt
Transcription factors regulate genes by
A.binding DNA and recruiting or blocking RNA polymerase
B.replicating chromosomes
C.carrying amino acids
D.sealing Okazaki fragments
Explanation
Core Concept
Activators recruit the polymerase complex to promoters; repressors obstruct it. The combination of factors at a gene's regulatory regions sets its expression level.
Correct Answer
Abinding DNA and recruiting or blocking RNA polymerase
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