Amplification of a second-messenger cascade can take place at which level of a signal cascade?
A)One activated receptor can activate numerous G proteins.
B)One activated G protein can activate numerous effector enzymes.
C)One active effector enzyme can catalyze numerous reactions.
D)One activated protein kinase can allosterically modulate numerous proteins.
E)All of the choices are correct.

Question

Quizplus · Accepted Answer

Amplification can occur at any level of a signal cascade, including the activation of numerous G proteins by a single receptor, activation of numerous effector enzymes by a single G protein, catalysis of numerous reactions by a single active effector enzyme, and allosteric modulation of numerous proteins by a single activated protein kinase. Therefore, all of the choices are correct.

Amplification of a Second-Messenger Cascade Can Take Place at Which