53. Which of the following statements about catabolic pathways is correct? a) degrade complex organic molecules rich in potential energy into simpler waste products with less energy, b) fermentation is a partial degradation of sugars with the use of oxygen, c) aerobic respiration is the most efficient catabolic pathway, d) some prokaryotes harvest chemical energy without oxygen, known as anaerobic respiration, e) catabolism is linked to work by a chemical shaft-GTP. (A) abc (B) abd (C) acd (D) abce (E) ace