O-LevelBiologyTransport in Plants5090/11 · May/June 2012 · Q21 Mark

The diagram shows part of a leaf with three spongy mesophyll cells labelled P, Q and R. The arrows show the direction of water movement by osmosis. [Figure 2.1] Which is the correct order of water potential in the cells from the highest to the lowest?

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AP Q R

BP R Q

CQ P R

DR P Q

✓ Correct answer

C: Q P R

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Topic: Transport in Plants, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2012 Paper 1 Variant 1, question 2.

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