Which of the Following Is a Common Step in the Opening/closing

Multiple Choice

Which of the following is a common step in the opening/closing of ion channels by acetylcholine and rhodopsin binding to their receptors?

A) The Gα·GTP subunit dissociates from the Gβγ complex.
B) The released Gα·GTP subunit interacts with the ion channel.
C) The released Gβγ complex interacts with the ion channel.
D) The released Gα·GTP subunit activates cGMP phosphodiesterase.