True about G protein coupled receptors is: (A) G proteins bind to hormones on the cell surface, (B) All the three subunits alpha, beta and gamma should bind to each other for G proteins to act, (C) G proteins act as inhibitory and excitatory because of difference in alpha subunit, (D) G protein is bound to GTP in resting state
Answer is C. Alpha subunit of GPCR has got adenyl cyclase stimulation of inhibition of adenyl cyclase- responsible for actions of GPCR Pg.no 46 KD TRIPATHI SEVENTH EDITION