In the Nitric Oxide Signaling Pathway,nitric Oxide Activates an Enzyme

Multiple Choice

In the nitric oxide signaling pathway,nitric oxide activates an enzyme that can convert many molecules of GTP into molecules of cGMP.cGMP is a small molecule that can diffuse through the cytoplasm and bind to an enzyme called protein kinase G (PKG) .Binding of cGMP to PKG leads to a change in the confirmation of PKG that leads to its activation.What type of signaling molecule is cGMP?

A) Scaffold
B) Adapter protein
C) Second messenger
D) Enzyme