The Biology Project > Cell Biology > Cell Signaling > Problem Set

Cell Signaling Problem Set

Problem 9: G-proteins

Correct!

The endogenous GTPase activity of G-proteins serves to:

A.	stimulate the activity of enzymes by producing energy.
B.	synthesize cGMP as a second messenger.
C.	synthesize GTP as an energy source.
D.	hydrolyze GTP returning the G protein to a pre-stimulated level of activity. Yes, responses to signals from outside the cell must be reversible.

The Biology Project > Cell Biology > Cell Signaling > Problem Set