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CLEP Biology Practice Test
Multiple Choice
CLEP Biology
Multiple Choice Practice Test
Question 1 of 3
51% Get this Question Right
Which protein is targeted by cholera toxin?
A
Actin
B
Vinculin
C
Vitonectin
D
G proteins
E
Permease
Cholera toxin inhibits the GTPase activity of the G protein. So the protein always remains in the activated state. This results in the constant activation of adenylate cyclase enzyme. cAMP level rises due to the activation of adenylate cyclase. This eventually leads to secretion of water, sodium ions etc to the intestinal lumen.
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