Of the following; receptor protein in a membrane that recognizes chemical signal is most similar tO: A)RNA specifying thc amino acids in J polypephidc B) a particular metabolic pathway opcrating within 3 specific organclle c)the active site of an enzyme in the cytoplasm that binds t0 a specific substratc D)an enzyme with an optimum pH and tempcrturc for actvity E) Genes making Up chrmosome