Which of the following criteria does not pert | vedclass

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(B) The correct answer is $B$. Facilitated transport (or facilitated diffusion) is the spontaneous movement of molecules or ions across a biological m

Vedclass · Accepted Answer

Uphill transport

Vedclass · Answer

(B) The correct answer is $B$. Facilitated transport (or facilitated diffusion) is the spontaneous movement of molecules or ions across a biological membrane through specific transmembrane integral proteins. It is a passive process,meaning it does not require energy $(ATP)$. Facilitated diffusion is mediated by protein channels and carrier proteins. Most transport proteins involved in this process are highly selective and only transport specific molecules. Since it is a passive process,molecules move down their concentration gradient,which is known as 'downhill transport'. 'Uphill transport' refers to active transport,where molecules move against their concentration gradient,requiring energy. Therefore,uphill transport is not a characteristic of facilitated transport.

Which of the following criteria does not pertain to facilitated transport?

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Which of the following statements is correct?
$(I)$ Rapid uptake of ions into the free space is a passive process.
$(II)$ Apoplast is important for passive processes.
$(III)$ Metabolic energy is required in passive processes.
$(IV)$ In the apoplast,passive processes occur through ion channels.

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