Which of these statements about facilitated diffusion across a membrane is true? The rate can not be saturated by the transported substrate. A specific membrane protein lowers the activation energy for movement of the solute through the membrane. It is impeded by the solubility of the transported solute in the nonpolar interior of the lipid bilayer. It is responsible for the transport of gases, such as O2, N2, and CH4 across biological membranes. It facilitates the "uphill" transport (against the concentration gradient) of a solute across the membrane.
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Step 1: Facilitated diffusion involves the use of carrier proteins or channel proteins in the cell membrane. Show more…
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