A-LevelBiologyTransport in plantsMay/June 2014Paper 1 Q241 Mark

The diagram represents part of the phloem pathway, with adjacent cells, from leaves to the root of a plant. [Figure 24.1] Which process is occurring between 1 to 2 and what is the effect on the water potential at 2?

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.

Aprocess from 1 to 2: active transport of sucrose, water potential at 2: becomes less negative

Bprocess from 1 to 2: active transport of sucrose, water potential at 2: becomes more negative

Cprocess from 1 to 2: diffusion of sucrose, water potential at 2: becomes less negative

Dprocess from 1 to 2: diffusion of sucrose, water potential at 2: becomes more negative

✓ Correct Answer

The correct answer is B: process from 1 to 2: active transport of sucrose, water potential at 2: becomes more negative

📋 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 May/June 2014 examination, Paper 1 Variant 2.

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