(1) This is also known as the citric acid cycle or Krebs cycle.

(2) Similarly, the citric acid cycle oxidizes acetate stepwise into CO2 with a net energy yield.

(3) Although oxygen does not participate directly in the citric acid cycle, the cycle operates only when O2 is. present.

(4) The citric acid cycle describes how food becomes carbon dioxide, water and energy in cells.

(5) Succinic acid, a intermediate in citric acid cycle, is produced by microbial metabolism. It has widely potential and practical use in several fields, such as medicine, food, chemistry et al.

(6) Your proposed sequence must not involve the net consumption of other citric acid cycle intermediates.