Question

Where does the Kreb Cycle Occur?

a) In the Cytoplasm
b) In the Mitochondria
c) In the Ribosome
d) All the three.

Answer 1

The Krebs Cycle takes place b) in the mitochondrial matrix of cells, and mitochondria are considered the powerhouse of the cell because they produce most of the ATP through oxidative phosphorylation.

Step-by-step explanation:

The Krebs Cycle, also known as the Citric Acid Cycle or Tricarboxylic Acid Cycle, occurs in the mitochondrial matrix of cells. This crucial stage of cellular respiration involves several chemical reactions that lead to the decarboxylation and oxidation of acetyl-CoA, resulting in the production of carbon dioxide, ATP, NADH, and FADH2. These energy carriers, particularly NADH and FADH2, then transfer electrons to the electron transport chain, which is embedded in the inner membrane of the mitochondria, to generate a larger amount of ATP through oxidative phosphorylation. Therefore, the correct answer to the question "Where does the Krebs Cycle occur?" is: (b) In the Mitochondria. Furthermore, the mitochondria are considered the powerhouse of the cell because most of the ATP is produced in the mitochondria by oxidative phosphorylation, making option (b) the accurate reason for this designation.