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: 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: None