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Question
Cholera toxin is an A-B type toxin in which the B portions bind to a receptor on a host cell and the A portion enters the cell to cause
Options:
A .  ADP ribosylation of adenylate cyclase that stops production of cAMP
B .  ADP ribosylation of a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP
C .  cleavage of rRNA that results in disruption of ribosome function
D .  ADP ribosylation of guanylate cyclase that stimulates production of cGMP
Answer: Option B
Answer: (b).ADP ribosylation of a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP

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