객관식
How are simple diffusion and facilitated diffusion similar?
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6. The Membrane
Simple and Facilitated Diffusion
객관식
Which of the following is not a characteristic of facilitated diffusion?
A
Does not require energy input
B
Involves passive transport
C
Moves substances against their concentration gradient
D
Requires a transport protein
검증된 단계별 안내1
Understand the concept of facilitated diffusion: Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special transport proteins.
Identify the characteristics of facilitated diffusion: It does not require energy input, involves passive transport, and requires a transport protein.
Recognize that passive transport means substances move along their concentration gradient, from high to low concentration, without energy input.
Analyze the given options: The option 'Moves substances against their concentration gradient' contradicts the definition of passive transport, as moving against the gradient requires energy, which is characteristic of active transport, not facilitated diffusion.
Conclude that the characteristic 'Moves substances against their concentration gradient' is not a feature of facilitated diffusion, as facilitated diffusion involves movement along the concentration gradient without energy input.
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