It Would Then Be Useful to Determine If the Mechanism

It would then be useful to determine if the mechanism of action for the XFF - XFF receptor is similar to that of estrogen or epinephrine. To test this, you use a nonhydrolyzable analog 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) delayed.
B) blocked.
C) prolonged.
D) both B and C
E) You cannot determine this from the given information.