It Would Be Useful to Determine If the Mechanism of Action

Multiple Choice

It would be useful to determine if the mechanism of action for the XFFXFF receptor is similar to that of estrogen or epinephrine.To test this,you use a nonhydrolyzable analogue of GTP in the reaction mixture.If the mechanism is still similar to that of epinephrine,you would expect the cellular responses would be

A) blocked.
B) prolonged.
C) delayed.
D) both choices B and C
E) The mechanism cannot be determined.