Either Using an example to illustrate each process, describe how substances move into and out of cells.

5090_w10_qp_22

THEORY

2010

Paper 2, Variant 2

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An experiment measured the rate at which plants take up magnesium ions from solution. One plant was given a poison that stops respiration. Another plant was left as normal. The graph shows the results. rate of uptake of magnesium ions concentration of magnesium ions in the solution N P plant left as normal plant given poison How are the magnesium ions being absorbed by the plants at points N and P?

5090_w20_qp_11

MCQ

2020

Paper 1, Variant 1

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An experiment measured the rate at which plants take up magnesium ions from solution. One plant was given a poison that stops respiration. Another plant was left as normal. The graph shows the results. rate of uptake of magnesium ions concentration of magnesium ions in the solution N P plant left as normal plant given poison How are the magnesium ions being absorbed by the plants at points N and P?

5090_w20_qp_12

MCQ

2020

Paper 1, Variant 2

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Which row applies to active transport?

5090_w22_qp_11

MCQ

2022

Paper 1, Variant 1

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Five pieces are cut from a potato, all of equal size and shape. The pieces are then placed in sugar solutions of different concentrations. After four hours, the change in length of each potato piece is measured. The results are shown...

5090_s07_qp_1

MCQ

2007

Paper 1, Variant 0

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Identical pieces of potato are placed in sucrose solutions of different concentrations. After three hours, the mass of each potato piece is measured. Which graph shows the results of this experiment?

5090_s10_qp_11

MCQ

2010

Paper 1, Variant 1

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Identical pieces of potato are placed in sucrose solutions of different concentrations. After three hours, the mass of each potato piece is measured. Which graph shows the results of this experiment?

5090_s10_qp_12

MCQ

2010

Paper 1, Variant 2

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Identical pieces of potato are placed in sucrose solutions of different concentrations. After three hours, the mass of each potato piece is measured. Which graph shows the results of this experiment?

5090_s12_qp_11

MCQ

2012

Paper 1, Variant 1

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The graphs show how the levels of dissolved oxygen and nitrates change along the length of a river. Which graph shows the effect of sewage entering the river at the point marked X?

5090_s12_qp_11

MCQ

2012

Paper 1, Variant 1

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Identical pieces of potato are placed in sucrose solutions of different concentrations. After three hours, the mass of each potato piece is measured. Which graph shows the results of this experiment?

5090_s12_qp_12

MCQ

2012

Paper 1, Variant 2

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