wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

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

A
Requirement of special membrane proteins
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
High selectivity
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Transport saturation
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Uphill transport
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D Uphill transport
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 or carrier proteins. Most transport proteins that mediate facilitated diffusion are very selective and only transport certain molecules. Neither channels nor carrier proteins require energy to facilitate the transport of substances; they enable the substances to move down their concentration gradients (downhill transport). There is only a certain number of molecules of these carriers or channels in a membrane. If the concentration of the substance being transported is so high that all the channel or carrier molecules are occupied, then the transport is said to undergo saturation, i.e. a further increase in the concentration gradient will not speed up the transport process.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Means of Transport
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon