May/June 2026 Paper 21

2026 · 40 questions · 40 parts · 40 marks

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28Transcription Translation Protein SynthesisMedium1 mark
A scientist investigates the action of a drug that affects the production of proteins by cells. The scientist grows two groups of cells. The scientist adds the drug to one group of the cells. After one day, the scientist determines the mass of proteins in each group of cells. The table shows the results.
group of cellsmass of proteins produced per million cells / g
with no drug25
with drug5
Which statements could explain the results in the table?
  1. 1
    The drug stops messenger RNA passing through ribosomes.
  2. 2
    The drug stops production of messenger RNA.
  3. 3
    The drug stops the copying of DNA before mitosis.