<prompt> Which of the following is a membrane-bound enzyme that catalyzes the formation of cyclic AMP from ATP?Tyrosine kinasePolymeraseATP synthaseAdenylate cyclase  <response>: 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 