AP BIOLOGY

Detailed explanation-1: -Answer and Explanation: Most of the carbon dioxide made during cellular respiration is produced during the citric acid cycle (also known as the Krebs cycle and the TCA cycle). The Krebs cycle is the second phase of cellular respiration.

Detailed explanation-2: -The main function of the Krebs cycle is to produce energy, stored and transported as ATP or GTP. The cycle is also central to other biosynthetic reactions where the intermediates produced are required to make other molecules, such as amino acids, nucleotide bases and cholesterol.

Detailed explanation-3: -Krebs cycle produces the following: Two molecules of carbon dioxide are given off. One molecule of ATP is formed. Three molecules of NADH are produced.

Detailed explanation-4: -Glycolysis produces 2 ATP molecules, and the Krebs cycle produces 2 more. Electron transport from the molecules of NADH and FADH2 made from glycolysis, the transformation of pyruvate, and the Krebs cycle creates as many as 32 more ATP molecules.

Detailed explanation-5: -Overview of the Krebs or citric acid cycle, which is a series of reactions that takes in acetyl CoA and produces carbon dioxide, NADH, FADH2, and ATP or GTP.