Gene Regulation: Operons and Epigenetics · Zoology

Histone acetylation generally results in:

  1. Condensation of chromatin fibers
  2. Stable repression of target genes
  3. Chromatin relaxation and transcription
  4. Direct methylation of DNA bases
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Correct answer: Chromatin relaxation and transcription

Histone acetylation neutralizes the positive charge on lysine residues, reducing histone-DNA interactions. This loosens chromatin structure (euchromatin) and promotes access by transcription factors, activating gene expression.

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