A-LevelBiologyTransport in plants9700/12 · May/June 2014 · 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?

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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

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

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Topic: Transport in plants, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2014 Paper 1 Variant 2, question 24.

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