Oxytocin stimulates a G protein-coupled signal transduction pathway.During signal transduction in this pathway, a G protein becomes activated.Which three molecules does G protein interact with in this pathway?
A) Ligand, GDP, and GTP
B) G protein-coupled receptor, ATP, and enzyme
C) Hormone, G protein-linked receptor, and GTP
D) G protein-linked receptor, GTP, and effector protein
E) GTP, cytoplasmic receptor, and transcription factor

Question

Quizplus · Accepted Answer

G protein interacts with the G protein-linked receptor (also called the G protein-coupled receptor) to become activated by exchanging GDP for GTP. The activated G protein then interacts with an effector protein to initiate the downstream signaling pathway.

Oxytocin Stimulates a G Protein-Coupled Signal Transduction Pathway