Multiple Choice
Isotonic is a term that describes what?
9. Transport Across Membranes
Passive Transport: Diffusion and Osmosis
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Carrier proteins that transport molecules via facilitated diffusion require energy from ATP.
A
True
B
False
Verified step by step guidance1
Understand the concept of facilitated diffusion: Facilitated diffusion is a type of passive transport that allows molecules to cross cell membranes with the help of carrier proteins, without the need for energy input from ATP.
Differentiate between passive and active transport: Passive transport, including facilitated diffusion, does not require energy because it relies on the concentration gradient, whereas active transport requires energy to move molecules against their concentration gradient.
Identify the role of carrier proteins: In facilitated diffusion, carrier proteins assist in the transport of molecules across the cell membrane by changing shape to allow the molecule to pass through, but they do not use ATP.
Clarify the misconception: The statement suggests that carrier proteins in facilitated diffusion require ATP, which is incorrect because facilitated diffusion is a passive process.
Conclude with the correct understanding: Since facilitated diffusion does not require ATP, the statement 'Carrier proteins that transport molecules via facilitated diffusion require energy from ATP' is false.
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Passive Transport: Diffusion and Osmosis practice set
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