Refer to the Figure Below

question 112

Multiple Choice

Refer to the figure below. Part of the signal transduction mechanism common to G protein-coupled receptors is shown.Which step occurs next?

• A) Extracellular signal binds to the a receptor.
• B) Signal binding to a receptor causes a change in the shape in the receptor.
• C) GTP bound to the G protein is exchanged for GDP.
• D) The activated G protein subunit binds to an effector protein.
• E) Activated cellular enzymes catalyze the formation of products, effectively amplifying the signal inside the cell.

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