AP BIOLOGY

Detailed explanation-1: -So 1 molecule of pyruvate is responsible for the release of 2 CO2 molecules during 1 Krebs cycle. Since 1 glucose molecule gives 2 pyruvate molecules. There will be two cycles to utilize both the pyruvate molecules. Thus, 1 glucose molecule is responsible for the release of 4 CO2 molecules during Krebs cycle.

Detailed explanation-2: -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-3: -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-4: -The Krebs cycle involves converting this acetyl CoA into carbon dioxide. During the steps of the cycle, two molecules of CO2 are released, in addition to 3 more molecules of NADH, one of FADH2, and one of GTP.

Detailed explanation-5: -The Krebs cycle or citric acid cycle takes place in the mitochondrial matrix, starting by connecting acetyl CoA to citric acid forming oxaloacetic acid. The cycle continues in the presence of different enzymes through the production of different intermediates and the release of carbon dioxide and water as end products.