Question

Which of the following criteria does not pertain to facilitated transport?
a) Requirement of special membrane proteins
b) High selectivity
c) Transport saturation
d) Uphill transport. Active transport​

Answer 1

Answer:

C. Transport saturation among these which does not pertain to facilitated transport

Answer 2

Answer:

d) Uphill transport.

Explanation:

• Facilitated transport or facilitated diffusion is  the  spontaneous  passage of  molecules  or  ions  across a biological membrane passing through specific transmembrane  integral  proteins.  
• Facilitated  diffusion  is mediated by protein channels and carrier proteins.
• Most transport proteins that mediate facilitated diffusion are very selective and only transport certain molecules.
• The major classes of proteins involved in facilitated diffusion are aquaporins, ion channels and carrier proteins.
• Importantly, neither channels nor carrier proteins require energy to facilitate the transport of molecules; they enable molecules to move down their concentration gradients (downhill transport).