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True about G protein couple receptors is _________________ ?
  • (A)  G proteins bind to hormones on the cell surface
  • (B)  All the three subunits alpha, beta and gamma should bind each other for G protein 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