In which method of transport,does the plasma | vedclass

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(C) Simple diffusion is a process in which the plasma membrane does not require any carrier molecule to allow small,non-charged molecules or lipid-sol

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Simple diffusion

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(C) Simple diffusion is a process in which the plasma membrane does not require any carrier molecule to allow small,non-charged molecules or lipid-soluble molecules to pass between the phospholipids to enter or leave the cell.In this process,particles move from areas of high concentration to areas of low concentration,moving down their concentration gradient.Oxygen,carbon dioxide,and most lipids enter and leave cells by simple diffusion.

Property	Simple Diffusion	Facilitated Transport	Active Transport
Requires special membrane proteins	No	$a$	Yes
Transport saturates	No	Yes	$b$
Uphill transport	$c$	No	Yes
Requires $ATP$ energy	No	No	$d$

In which method of transport,does the plasma membrane not require a carrier molecule?

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