Which Does Not Apply to the Diffusion of O₂,CO₂ and Small

question 69

Multiple Choice

Which does not apply to the diffusion of O₂,CO₂ and small hydrophobic molecules across a membrane?

• A)Diffusion is driven by the concentration gradient across the membrane.
• B)The diffusion is spontaneous and there is a decrease in free energy as diffusion occurs.
• C)The transport is saturable.
• D)Membrane proteins are not needed for the diffusion process.

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