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In cells, some molecules can move down their concentration gradients by crossing the phospholipid portion of the membrane directly, while others must pass through membrane proteins. Which of these statements applies to facilitated diffusion?

I. requires the use of a membrane protein

II. used to move large/ or polar molecules

III. requires energy

I and II


III only


I only


I and III

Respuesta :

Answer:

In cells, some molecules can move down their concentration gradients by crossing the lipid portion of the membrane directly, while others must pass through membrane proteins in a process called facilitated diffusion.

Explanation:

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