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A-LevelBiologyNucleic acids and protein synthesisOct/Nov 2022Paper 4 Q613 Marks

The lac operon of prokaryotes contains a group of structural genes that are under the same control and are transcribed together. Another operon found in prokaryotes is the trp operon. Fig. 6.1 summarises the structure and control of the trp operon. [Figure 6.1]

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 Oct/Nov 2022 examination, Paper 4 Variant 2.

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