EVERYDAY SCIENCE

Detailed explanation-1: -The third step in aerobic respiration is the citric acid cycle, which is also called the Krebs cycle. In this stage of Aerobic respiration, the oxaloacetate combines with the acetyl-coenzyme A and produces citric acid.

Detailed explanation-2: -The three stages of aerobic cellular respiration are glycolysis (an anaerobic process), the Krebs cycle, and oxidative phosphorylation.

Detailed explanation-3: -The reactions of cellular respiration can be grouped into three stages: glycolysis (stage 1), the Krebs cycle, also called the citric acid cycle (stage 2), and electron transport (stage 3).

Detailed explanation-4: -The other three stages of cellular respiration-pyruvate oxidation, the citric acid cycle, and oxidative phosphorylation-require oxygen in order to occur. Only oxidative phosphorylation uses oxygen directly, but the other two stages can’t run without oxidative phosphorylation.

Detailed explanation-5: -Aerobic ("oxygen-using") respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport.