which-characteristic-distinguishes-porins-and-channels-from-carrier-proteins-in-

Question

Which characteristic distinguishes porins and channels from carrier proteins in facilitated diffusion?

Accepted Answer

Porins and channels form membrane-spanning tunnels without conformational changes.

Answer

Porins and channels require energy to transport solutes.

Answer

Porins and channels undergo conformational changes to transport solutes.

Answer

Porins and channels transport solutes against their concentration gradient.