Which of These Statements About Facilitated Diffusion Across a Membrane

question 38

Multiple Choice

Which of these statements about facilitated diffusion across a membrane is true?

• A)A specific membrane protein lowers the activation energy for movement of the solute through the membrane.
• B)It can increase the size of a transmembrane concentration gradient of the diffusing solute.
• C)It is impeded by the solubility of the transported solute in the nonpolar interior of the lipid bilayer.
• D)It is responsible for the transport of gases such as O₂,N₂,and CH₄ across biological membranes.
• E)The rate is not saturable by the transported substrate.

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