53. Which of the following descriptions of the Monod, Wyman, and Changeux model of allosteric enzyme regulation is NOT correct? (A) The model proposes that an allosteric enzyme has two conformational states: R (Relaxed) and T (Tense or Tau). (B) The model imposes functional and structural symmetry: all subunits of an enzyme oligomer share the same conformation. (C) The model suggests that the enzyme exists predominantly in the R state when the substrate concentration is low. (D) The model focuses on conformational equilibrium and population selection by lhe ligands. (E) The model puts less emphasis on ligand-induced conformational changes.