<prompt> True about cytokines are all except:It is polypeptideHave autocrine and paracrine effectsInvolve in leukocytic movementsIt takes pa in intrinsic enzymatic reaction  <response>: D i.e It takes pa in intrinsic enzymatic reaction They are polypeptideQ in nature.Induced their effect in three ways: Autocrine, paracrine endocrine effects.Q Mediates natural immunity Affects leucocytic movementQRegulate lymphocytic growth activation differentiation.Activate inflammatory cells stimulate hematopoesis. 