MCQOPTIONS
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				| 1. | 
                                    In small intestine, cholera toxin acts by______________? | 
                            
| A. | ADP – ribosylation of the G regulatory protein | 
| B. | Inhibition of adenyl cyclase | 
| C. | Activation of GTPase | 
| D. | Active absorption of NaCI | 
| Answer» B. Inhibition of adenyl cyclase | |