Facilitated diffusion is a form of cell transport that
A - VCE - SSCE Biology - Question 15 - 2008 - Paper 1
Question 15
Facilitated diffusion is a form of cell transport that
A. moves oxygen and carbon dioxide across membranes.
B. occurs against a concentration gradient.
C. requires s... show full transcript
Worked Solution & Example Answer:Facilitated diffusion is a form of cell transport that
A - VCE - SSCE Biology - Question 15 - 2008 - Paper 1
Step 1
A. moves oxygen and carbon dioxide across membranes.
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Answer
Facilitated diffusion does not primarily transport gases like oxygen and carbon dioxide. Instead, these gases typically diffuse through the lipid bilayer of the membrane.
Step 2
B. occurs against a concentration gradient.
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Answer
This statement is incorrect. Facilitated diffusion occurs down a concentration gradient, from an area of higher concentration to an area of lower concentration.
Step 3
C. requires specific protein channels.
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Answer
This statement is true. Facilitated diffusion requires specific protein channels to assist in the movement of molecules across the membrane.
Step 4
D. uses energy supplied by ATP.
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Answer
This statement is false. Facilitated diffusion is a passive process and does not require energy from ATP; it relies instead on the concentration gradient.
