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.

Question

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.

Quizplus · Accepted Answer

The next step in the signal transduction mechanism common to G protein-coupled receptors is the activated G protein subunit binding to an effector protein. This binding activates the effector protein, leading to downstream signaling events.

Refer to the Figure Below