A-LevelBiologyCell membranes and transportOct/Nov 2016Paper 1 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]
AStalk curved inwards slightly.
BStalk curved outwards significantly.
CStalk remains mostly straight.
DStalk curved inwards significantly.
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The correct answer is A. This question tests the candidate's understanding of cell membranes and transport within the Biologysyllabus. The examiner's mark scheme requires...
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