Which of the following transport mechanisms r | vedclass

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(B) $1$. Simple diffusion is a passive process that does not require membrane proteins.$2$. Facilitated diffusion involves the movement of molecules a

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Facilitated Diffusion and Active Transport

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(B) $1$. Simple diffusion is a passive process that does not require membrane proteins.$2$. Facilitated diffusion involves the movement of molecules across a membrane through specific transport proteins without the expenditure of energy.$3$. Active transport involves the movement of molecules against the concentration gradient,which requires both energy $(ATP)$ and specific membrane transport proteins (pumps).$4$. Therefore,both facilitated diffusion and active transport require membrane proteins for the transport of substances.

Which of the following transport mechanisms require protein for the movement of substances?

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