Consider the fluid mosaic model of the plasma membrane - VCE - SSCE Biology - Question 3 - 2020 - Paper 1
Question 3
Consider the fluid mosaic model of the plasma membrane.
It is correct to state that
A. structure W changes shape to actively transport substances.
B. multiples of st... show full transcript
Worked Solution & Example Answer:Consider the fluid mosaic model of the plasma membrane - VCE - SSCE Biology - Question 3 - 2020 - Paper 1
Step 1
A. structure W changes shape to actively transport substances.
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Answer
This statement is incorrect. While some proteins in the plasma membrane can change shape, the primary function of structure W does not involve the active transport mechanisms typical of carriers.
Step 2
B. multiples of structure X move during endocytosis.
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Answer
This statement is also not correct. During endocytosis, vesicles formed from the plasma membrane engulf materials, but this does not imply that multiples of structure X directly move dynamically.
Step 3
C. structure Y transports lipid-based hormones.
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Answer
This statement is correct. Structure Y, often associated with carrier proteins, plays a significant role in transporting lipid-soluble hormones across the membrane.
Step 4
D. structure Z is the most abundant membrane molecule.
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Answer
This statement is typically accurate if structure Z refers to phospholipids which are indeed the most abundant components of plasma membranes.
