<prompt> True about G protein coupled receptors isG proteins bind to hormones on the cell surfaceAll the three subunits alpha, beta and gamma should bind to each other for G proteins to actG proteins act as inhibitory and excitatory because of difference in alpha subunitG protein is bound to GTP in resting state  <response>: 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 