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Cellular control

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Question 2

Which of the following processes result in a decrease in the rate of transcription of a specific target gene?

  1. Methylation of DNA within the promoter region of the gene.
  2. Acetylation of histone proteins associated with the gene's DNA.
  3. Cleavage of the gene's mRNA transcripts by an active RNA-induced silencing complex (RISC).
A

1, 2 and 3

B

Only 1 and 2

C

Only 2 and 3

D

Only 1

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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