AP BIOLOGY

Detailed explanation-1: -In eukaryotes, the Krebs cycle reactions take place in the mitochondrial matrix, a dense solution that surrounds the mitochondria crests: in addition to water, the matrix contains all the enzymes necessary for the biochemical reactions of the cycle, coenzymes, and phosphates.

Detailed explanation-2: -In all eukaryotes, mitochondria are the site where the Krebs cycle takes place. The cycle takes place in a mitochondrial matrix producing chemical energy in the form of NADH, ATP, FADH2. These are produced as a result of oxidation of the end product of glycolysis – pyruvate.

Detailed explanation-3: -The mitochondrial matrix has the required enzymes and environment for the complex reactions of the Krebs cycle to take place. Further, the products of the Krebs cycle drive the electron transport chain and oxidative phosphorylation, both of which occur in the inner mitochondrial membrane.