A-LevelBiologyTransport in plantsFeb/Mar 2021Paper 1 Q261 Mark

What is an example of a mass flow system in a plant?

Q: What topic does this question test?

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

Athe loading of amino acids from the surrounding tissues into companion cells

Bthe movement of sap through the phloem sieve tubes in the stem

Cthe movement of water across the root along the symplastic pathway

Dthe movement of water vapour from the internal spaces in the leaf out through the stomata

✓ Correct Answer

The correct answer is B: the movement of sap through the phloem sieve tubes in the stem

📋 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 Transport in plants in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Source

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

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