A Mutation That Knocks Out the GTPase Activity of a G

question 45

Multiple Choice

A mutation that knocks out the GTPase activity of a G protein would have what effect on a cell?

• A) The concentration of available GTP would decrease.
• B) The number of G proteins in the cell would increase.
• C) The G protein would be inactivated by a G protein-coupled receptor/signal molecule complex.
• D) The G protein would always be active.

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