Apentix/AP Biology/Unit 6: Gene Expression and Regulation/Question
AP Biologymediummcq1 pt

A gene is transcribed at a low rate in all tissues and at a high rate in the liver only. The best explanation is

A.liver-specific transcription factors activate its enhancer
B.the gene exists only in liver cells
C.liver cells transcribe a different genetic code
D.other tissues destroy the gene

Explanation

Core Concept

Basal machinery gives low-level expression everywhere; liver-only activators bind the enhancer and boost transcription — tissue-specific regulation.

Correct Answer

Aliver-specific transcription factors activate its enhancer

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