<prompt> All are true regarding G protein Except?It have a trimeric structureIt is activated by GTP bindingAlpha subunit has GTPase activityActive conformation has all three subunits  <response>: G Protein have trimeric structure with alpha,beta and gamma subunits.But activated form has only GTP bound alpha subunit-GTP-alpha. The action is terminated when the GTPase activity of alpha subunit hydrolyses GTP to GDP.ADP ribosylation of alpha subunit leads to inhibition of GTPase activity. Ref:Murray R.K. 2011. Chapter 46. Intracellular Traffic Soing of Proteins. In D.A. Bender, K.M. Botham, P.A. Weil, P.J. Kennelly, R.K. Murray, V.W. Rodwell Eds, Harpers Illustrated Biochemistry, 29e. 