A-LevelBiologyBiological moleculesMay/June 2021Paper 1 Q61 Mark

A student carries out a semi-quantitative test with Benedict’s solution. Which statement about this procedure is correct?

Q: What topic does this question test?

This question tests Biological molecules in A-Level Biology (syllabus code 9700). It is worth 1 mark.

AIt detects only the presence or absence of glucose.

BIt provides an indication of relative reducing sugar concentrations.

CThe precipitate needs to be filtered, dried and weighed to give the reducing sugar concentration.

Dcolorimeter needs to be used to determine the glucose concentration.

✓ Correct Answer

The correct answer is B: It provides an indication of relative reducing sugar concentrations.

📋 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 multiple-choice question tests Biological molecules in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Biology May/June 2021 examination, Paper 1 Variant 2.

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