Which is true of facilitated transport by carrier proteins?
A)Facilitated transport only applies to small and lipid soluble molecules.
B)It is represented by the glucose carrier that can transport hundreds of molecules a second.
C)After a carrier has transported a molecule,it is unable to transport any more.
D)Facilitated transport requires expenditure of chemical energy and is therefore active transport.
E)One carrier protein can carry a variety of different molecules.

Question

Quizplus · Accepted Answer

Facilitated transport by carrier proteins is a type of passive transport, meaning it does not require the expenditure of chemical energy by the cell. It allows for the transport of larger or charged molecules (such as glucose) that cannot diffuse through the cell membrane on their own. The glucose carrier protein can transport hundreds of molecules per second. Options A and D are incorrect as facilitated transport is specific to certain molecules and does not require energy expenditure. Option C is incorrect as carrier proteins can transport multiple molecules.

Which Is True of Facilitated Transport by Carrier Proteins