A) transport of enzymes
B) water transport
C) active transport of ions
D) passive transport of ions
Correct Answer: D
Solution :
There are two major classes of membrane transport proteins carrier proteins and channel proteins. Carrier proteins involved with passive transport of ions or solutes across the membrane from an area of high concentration to one of low concentration. The carrier molecule probably undergoes a change in shape to transport the substance. Active transport of ions require ATP.
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