Transporters, in Contrast to Channels, Work By

Question

Transporters, in contrast to channels, work by
A)specific recognition of transport substrates.
B)a gating mechanism.
C)filtering solutes by charge.
D)filtering solutes by size.

Accepted Answer

Transporters work by recognizing and binding specific substrates and then undergoing a conformational change to transport them across the membrane. Channels, on the other hand, allow passive movement of solutes down their concentration gradient without specific recognition. Filtering by charge and size are not mechanisms used by either transporters or channels.