This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Phage encoded exotoxin fo vibrio cholerae resembles which toxin of E. coli ? \nSelect and explain. \nA. Heat labile toxin, B. Heat stable toxin, C. Shiga like toxin, D. Verocytotoxin', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Heat labile toxin Heat labile toxin of E. coli and cholera toxin resemble each other in their structure, antigenic propeies and mode of action. Both act by activating adenyl cyclase in the enterocyte to form cyclic adenosine 5' monophosphate (c AMP). Heat stable toxin of E. coli acts by activation of cyclic guanosine monophosphate (c GMP) in the intestine.", 'role': 'assistant'}]