<prompt> Agonist is havingAffinity with intrinsic activity 0Affinity with intrinsic activity 1Affinity with intrinsic activity -1None  <response>: Ref-KDT 6e p41 Agonist have intrinsic acriacti 1 because Intrinsic activity is a measure of the ability of a drug that is bound to the receptor to generate an activating stimulus and produce a change in cellular activity. Both agonists and antagonists can bind to a receptor. However, only agonist molecules can activate the receptor. 