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.

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