 
			 
			MCQOPTIONS
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				| 1. | 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 | 
| 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» C. cleavage of rRNA that results in disruption of ribosome function | |