Materials are constantly exchanged between a cell and its surroundings - VCE - SSCE Biology - Question 20 - 2008 - Paper 1
Question 20
Materials are constantly exchanged between a cell and its surroundings. The ease with which a molecule passes through a plasma membrane can be represented by a perme... show full transcript
Worked Solution & Example Answer:Materials are constantly exchanged between a cell and its surroundings - VCE - SSCE Biology - Question 20 - 2008 - Paper 1
Step 1
A. water is more lipid-soluble than alcohol.
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Answer
From the graph, we observe that water has a higher permeability coefficient compared to alcohol, indicating that water is indeed more lipid-soluble than alcohol.
Step 2
B. a cell gets rid of urea more slowly than excess water.
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Answer
The graph shows that urea has a lower permeability coefficient compared to water. This suggests that a cell removes urea more slowly than excess water.
Step 3
C. drugs like alcohol and codeine enter cells more slowly than ethylene glycol.
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Answer
Referring to the graph, ethylene glycol has a higher permeability coefficient than both alcohol and codeine. Hence, alcohol and codeine enter cells more slowly than ethylene glycol.
Step 4
D. ethylene glycol passes through the plasma membrane more easily than diethylurea.
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Answer
The graph indicates that ethylene glycol has a higher permeability coefficient than diethylurea. Therefore, ethylene glycol does pass through the plasma membrane more easily than diethylurea.
