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: -The Krebs cycle is contained within mitochondria. Within the mitochondrial matrix, the reactions of the Krebs cycle adds electrons and protons to a number of electron carriers, which are then used by the electron transport chain to produce ATP.

Detailed explanation-3: -Where does the Krebs cycle take place? The TCA cycle was first observed in the muscle tissue of a pigeon. It takes place in all eukaryotic and prokaryotic cells. In eukaryotes, it occurs in the matrix of the mitochondrion.

Detailed explanation-4: -The tricarboxylic acid cycle (TCA cycle) is located in the mitochondrial matrix and is a common metabolic pathway for all fuels, and is responsible for the production of the majority of the reduced coenzymes used for the generation of ATP in the electron transfer chain.