Multiple Choice
How is simple diffusion similar to facilitated diffusion?
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6. The Membrane
Simple and Facilitated Diffusion
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How is facilitated diffusion different from simple diffusion?
A
Facilitated diffusion requires energy input from ATP.
B
Facilitated diffusion occurs against the concentration gradient.
C
Facilitated diffusion is faster than simple diffusion due to smaller molecules.
D
Facilitated diffusion involves the use of transport proteins.
Verified step by step guidance1
Understand the concept of diffusion: Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration, driven by the concentration gradient.
Differentiate between simple and facilitated diffusion: Simple diffusion does not require any assistance from proteins and occurs directly through the lipid bilayer of the cell membrane.
Identify the role of transport proteins in facilitated diffusion: Facilitated diffusion involves specific transport proteins that help move molecules across the cell membrane, which cannot pass through the lipid bilayer easily.
Clarify the energy requirement: Unlike active transport, facilitated diffusion does not require energy input from ATP as it occurs along the concentration gradient.
Recognize the types of molecules involved: Facilitated diffusion typically involves larger or polar molecules that cannot diffuse through the cell membrane without the help of transport proteins.
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