Final answer:
In the mitochondrial matrix, the Krebs cycle occurs, generating NADH and FADH2 which pass electrons to produce ATP. The matrix also contains mitochondrial DNA, ribosomes, and enzymes necessary for this cycle. Pyruvate is converted to acetyl CoA before entering the Krebs cycle.
Step-by-step explanation:
In the mitochondrial matrix, the second stage of cellular respiration, known as the Krebs cycle or citric acid cycle, takes place. This cycle is a series of redox and decarboxylation reactions that both generates energy-rich molecules and removes carbon dioxide. The energy carrier molecules NADH and FADH2 are created during this cycle, which then pass electrons through the electron transport chain in the mitochondria to produce ATP, an energy-carrying molecule. Additionally, the mitochondrial matrix contains mitochondrial DNA, ribosomes, and the enzymes necessary for the Krebs cycle to occur. Prior to entering the Krebs cycle, a multienzyme complex within the matrix also converts pyruvate into acetyl CoA, releasing carbon dioxide and forming NADH.
The mitochondria matrix is an important component of mitochondria, which are organelles found in eukaryotic cells.
The matrix is the space enclosed by the inner membrane of the mitochondria and contains the mitochondrial DNA, ribosomes, and metabolic enzymes.
One of the key processes that takes place in the matrix is the Krebs cycle, also known as the citric acid cycle or TCA cycle. In this cycle, high-energy molecules like ATP, NADH, and FADH2 are generated.