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2.1 Supplying the cell

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Question 10

Lettuce discs were placed in sucrose solutions of different concentrations. Their percentage changes in mass were recorded.

Concentration of sucrose solution in mol/dm3\text{mol/dm}^3mol/dm3Percentage change in mass
0.00+20.0
0.10+10.0
0.30-10.0
0.50-24.0

Estimate the concentration of sucrose solution at which the water potential of the solution would equal the water potential of the lettuce cells.

[1]
A

0.15 mol/dm30.15\ \text{mol/dm}^30.15 mol/dm3

B

0.20 mol/dm30.20\ \text{mol/dm}^30.20 mol/dm3

C

0.25 mol/dm30.25\ \text{mol/dm}^30.25 mol/dm3

D

0.10 mol/dm30.10\ \text{mol/dm}^30.10 mol/dm3

Markscheme

2.1 Supplying the cell Questions

  1. GCSE
  2. /Biology
  3. /2.1 Supplying the cell

194 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.

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