39. Which of the following statements about glycogen is/are WRONG ? (A) Glycogen is important energy storage of animals although the storage capacity will be depleted within hours without any exogenous source of energy. (B) Breakdown of glycogen is performed by glycogen phosphorylase, which converts one glucose moiety to glucose-6-phosphate from the non-reducing end of the polymer. (C) A debranching enzyme is also required for breakdown of glycogen. (D) All of the above. (E) None of the above.