This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Biochemistry
Which of the following is a membrane-bound enzyme that catalyzes the formation of cyclic AMP from ATP? 
Select and explain. 
A. Tyrosine kinase, B. Polymerase, C. ATP synthase, D. Adenylate cyclase
D: Adenylate cyclase
Answer: D: Adenylate cyclase 
Explanation: An enzyme that catalyzes the conversion of adenosine triphosphate (ATP) to cyclic adenosine monophosphate (cAMP) and inorganic pyrophosphate (PPi ).It is activated by the attachment of a hormone or neurotransmitter to a specific membrane-bound receptor.Ref: DM Vasudevan, 7th edition, page no: 504, 506