During Signal Transduction That Involves Heterotrimeric G Proteins, the Event

question 22

Multiple Choice

During signal transduction that involves heterotrimeric G proteins, the event that immediately precedes the dissociation to alpha monomer and beta-gamma dimer is the

• A) binding of a hormone ligand to the intact heterotrimer.
• B) creation of new protein-protein interactions.
• C) exchange of guanine nucleotides on the alpha subunit.
• D) hydrolysis of guanosine triphosphate by the beta subunit.
• E) posttranslational modification of the gamma subunit with a lipid anchor.

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