Facilitated Diffusion

AP Biology· difficulty 2/5

Aquaporins are membrane proteins that

  • A

    Bind glucose for facilitated diffusion uptake

  • B

    Allow rapid passive water flow across the membrane

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  • C

    Catalyze ATP synthesis from a proton gradient

  • D

    Allow active sodium transport across the membrane

Explanation

Aquaporins are channel proteins specifically permeable to water, enabling osmosis to occur much faster than diffusion alone.

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