When a G Protein Is Activated in a Signal Transduction

question 217

Multiple Choice

When a G protein is activated in a signal transduction pathway,

• A) GDP is released from the G protein, and GTP occupies the nucleotide-binding site.
• B) GTP is released from the G protein, and GDP occupies the nucleotide-binding site.
• C) cGMP occupies the otherwise empty nucleotide-binding site on the G protein.
• D) cGMP leaves the otherwise occupied nucleotide-binding site on the G protein.
• E) GDP causes a conformational change in the G protein.

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