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3.2 DNA and protein synthesis

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Question 25
H

A substance prevents tRNA molecules from carrying amino acids. It does not affect RNA polymerase or the attachment of mRNA to ribosomes.

Which result is most likely immediately after the substance is added?

[1]
A

mRNA and polypeptide production both increase at the same time.

B

mRNA and polypeptide production both stop at the same time.

C

mRNA production decreases, but polypeptides are still produced.

D

mRNA is still produced, but polypeptide production decreases.

Markscheme

3.2 DNA and protein synthesis Questions

  1. GCSE
  2. /Biology
  3. /3.2 DNA and protein synthesis

44 exam-style questions on Edexcel GCSE Biology 3.2 DNA and protein synthesis, covering 3.2.1 DNA structure as a polymer, 3.2.2 Genome and gene definitions, 3.2.3 Extracting DNA from fruit, 3.2.4 Base order determines protein shape, 3.2.5 Stages of protein synthesis, 3.2.6 Non-coding DNA variants affecting phenotype, and 3.2.7 Coding DNA variants affecting phenotype. Each one has a worked solution and a mark scheme showing where the marks go.

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