All of the following may be considered second messengers except
A)inositol triphosphate
B)calcium ions
C)phosphodiesterase
D)cyclic AMP
E)diacylglycerol

Question

Quizplus · Accepted Answer

Phosphodiesterase is an enzyme that breaks down cyclic nucleotides (such as cyclic AMP and cyclic GMP) into their non-cyclic forms, and is not considered a second messenger. Inositol triphosphate, calcium ions, cyclic AMP, and diacylglycerol are all examples of second messengers in signal transduction.

All of the Following May Be Considered Second Messengers Except