A-LevelBiologyCell membranes and transport9700/12 · Oct/Nov 2016 · Q181 Mark

The stalk of a dandelion flower is a hollow tube. Pieces of the stalk are cut as shown and placed in sucrose solutions of different water potentials. Which diagram shows the piece that is placed in the sucrose solution with the highest water potential? [Figure 18.1]

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AStalk curved inwards slightly.

BStalk curved outwards significantly.

CStalk remains mostly straight.

DStalk curved inwards significantly.

✓ Correct answer

A: Stalk curved inwards slightly.

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Topic: Cell membranes and transport, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2016 Paper 1 Variant 2, question 18.

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