Q: Which of the following is true of carrier proteins that are used in facilitated diffusion?
A		Carrier proteins used in facilitated diffusion are usually coupled to ATP hydrolysis
B		Carrier proteins used in facilitated diffusion are specific for a specific type of molecule
C		Carrier proteins used in facilitated diffusion are located in the nuclear membrane
D		Carrier proteins used in facilitated diffusion work against concentration gradients

Protein Structure and Function | Membrane Transport and Signalling |