AP BIOLOGY

Detailed explanation-1: -In this stage of Aerobic respiration, the oxaloacetate combines with the acetyl-coenzyme A and produces citric acid. The citric acid cycle undergoes a series of reactions and produces 2 molecules of carbon dioxide, 1 molecule of ATP, and reduced forms of NADH and FADH.

Detailed explanation-2: -Citric acid cycle. The acetyl CoA combines with a four-carbon molecule and goes through a cycle of reactions, ultimately regenerating the four-carbon starting molecule. ATP (or, in some cases, GTP), NADH, and FADH 2 are made, and carbon dioxide is released. These reactions take place in the mitochondrial matrix.

Detailed explanation-3: -The stage of aerobic respiration which produces ATP and NADH, and releases CO2 is the Krebs cycle.

Detailed explanation-4: -In the second reaction of the Krebs cycle, the isomerisation of citrate to isocitrate takes place. As an intermediate, cis-aconitate is formed. Therefore, it is a two-step reaction sequence.

Detailed explanation-5: -The second stage of aerobic respiration is the Kreb’s cycle, which is also called the citric acid cycle. Glycolysis took place in the cytoplasm, but afterwards the pyruvate molecules move into the mitochondria, which is where the Kreb’s cycle takes place.