EASY
AS and A Level
IMPORTANT
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What are the most abundant molecules in the cell surface membranes of plant cells?
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Important Questions on Cell Membranes and Transport
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AS and A Level
IMPORTANT
Why are all cells (prokaryotes and eukaryotes) surrounded by a cell surface membrane?
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AS and A Level
IMPORTANT
What is the meaning of 'partially permeable' when applied to plasma membrane.
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AS and A Level
IMPORTANT
Why are phospholipids important in membrane structure?
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IMPORTANT
State two examples where the surface area of membranes has been increased by folding. For each example, state why the increased surface area is an advantage.
MEDIUM
AS and A Level
IMPORTANT
Why does the cell surface membrane not provide a barrier to the entry of hydrophobic molecules into the cell?
MEDIUM
AS and A Level
IMPORTANT
Suggest three reasons why exchange between the cell and its environment is essential.
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AS and A Level
IMPORTANT
One role of cholesterol in membranes is
MEDIUM
AS and A Level
IMPORTANT
Copy the table below and place a tick or cross in each box as appropriate.
