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A-LevelBiologyNucleic acids and protein synthesisMay/June 2022Paper 2 Q613 Marks

Cotransporter proteins are membrane proteins found in companion cells of phloem tissue. Messenger RNA (mRNA) is the molecule in cells that carries genetic information in the DNA that codes for cotransporter proteins to the sites of protein synthesis in the cytoplasm.

Q: What topic does this question test?

This question tests Nucleic acids and protein synthesis in A-Level Biology (syllabus code 9700). It is worth 13 marks.

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Biology Question

Topic

This structured question tests Nucleic acids and protein synthesis in A-Level Biology (syllabus code 9700). It is worth 13 marks.

Source

This question appeared in the Cambridge A-Level Biology May/June 2022 examination, Paper 2 Variant 1.

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