Question

question 4 of 25
what must happen before acetyl coa can be formed during respiration?
a. lactic acid formation
b. fermentation
c. glycolysis
d. the krebs cycle

Explanation:

Cellular respiration starts with glycolysis. In glycolysis, glucose is broken down into pyruvate. Pyruvate then undergoes further processing (pyruvate oxidation) to form acetyl CoA. Lactic acid formation and fermentation are anaerobic processes (not the normal pathway before acetyl CoA formation in aerobic respiration). The Krebs cycle uses acetyl CoA as a substrate (acetyl CoA is formed before the Krebs cycle starts). So glycolysis must occur before acetyl CoA can be formed during aerobic respiration.

Answer:

C. Glycolysis