Quiz: Diffusion Across Cell Membranes
AQA GCSE Biology (8461)
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Building on what you've learned about cells, let's test your knowledge of diffusion across cell membranes!
What is diffusion?
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Which of these factors affect the rate of diffusion? (Select all that apply)
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Diffusion is important for cells because it helps substances like {{blank0}} and {{blank1}} move in and out of the cell.
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Match the items on the left with their correct pairs on the right
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A molecule takes 20 seconds to diffuse across a membrane that is 5 micrometres thick. What is the rate of diffusion (micrometres per second)?
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Which of the following is an example of a substance that diffuses out of cells?
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Which statements about diffusion are correct? (Select all that apply)
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Match the items on the left with their correct pairs on the right
Diffusion across membranes occurs faster when the {{blank0}} is steeper or the membrane is {{blank1}}.
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