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Cellular control

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Question 13

Which of the following epigenetic modifications lead to the inhibition of transcription (silencing) of a target gene in eukaryotic cells?

  1. Addition of methyl groups to cytosine bases in DNA
  2. Removal of acetyl groups from histones, increasing their net positive charge
  3. Addition of acetyl groups to lysine residues on histones, reducing chromatin condensation
A

1, 2 and 3

B

Only 1 and 3

C

Only 1 and 2

D

Only 2 and 3

Markscheme

Cellular control Questions

  1. A Level
  2. /Biology
  3. /Cellular control

30 exam-style questions on OCR A A Level Biology Cellular control. Each one has a worked solution and a mark scheme showing where the marks go.

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