AP Biologymediummcq1 pt
How do histone modifications regulate transcription?
A.They loosen or tighten chromatin around promoters
B.They change the codon sequence
C.They splice RNA
D.They replicate DNA faster
Explanation
Core Concept
Acetylation relaxes chromatin, granting access to transcription machinery; methylation can tighten it. Chromatin state gates whether genes are readable.
Correct Answer
AThey loosen or tighten chromatin around promoters
More Unit 6: Gene Expression and Regulation practice questions
- mediumA double-stranded DNA sample contains 30% adenine. What percentage of its bases are guanine?
- mediumThe trp operon's structural genes are transcribed when
- easyWhich process is post-translational regulation?
- easyThe codon UUU codes for phenylalanine in bacteria, plants, and humans. This illustrates that the genetic code is
- hardDNA fingerprinting relies on
Practice more AP Biology questions with full explanations
Practice Unit 6: Gene Expression and Regulation Questions →