Which of these properties are seen in both facilitated diffusion as well as active transport?

I. Requires ATP for energy.
II. Highly selective process.
III. Occurs against the concentration gradient.
IV. There occurs transport saturation.

Question

TestHub · Accepted Answer

Both facilitated diffusion and active transport require membrane proteins for the transport of substances. Hence, they are highly selective. If all the membrane proteins are occupied for transport, there may be a saturation. However, active transport occurs against the concentration gradient, and it requires energy in the form of ATP. This is not seen in facilitated diffusion.

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