Which of the following does not occur within mitochondria ?
Which of the following does not occur within mitochondria ? Correct Answer Glycolysis
Concept-
- Mitochondria is is a double-layered cell organelle, in which the outer layer is porous and the inner layer is folded upon itself is known to be cristae.
- The number of mitochondria in a single cell may be up to 50 to 5000.
- The inner lumen of mitochondria contains ribosome phosphate particles and DNA molecules.
- It has the potential to synthesize its own protein and oxidation of carbohydrates and fats are taken place with the help of enzymes in mitochondria.
- This energy is stored in the form of ATP ( Adenosine Triphosphate ) so, these are known as the "Powerhouse of the cell".
Key Points
Glycolysis does not occur within mitochondria.
- The term glycolysis has originated from the Greek words, glycos for sugar, and lysis for splitting.
- The scheme of glycolysis was given by Gustav Embden, Otto Meyerhof, and J. Parnas, and is often referred to as the EMP pathway.
- In anaerobic organisms, it is the only process in respiration.
- Glycolysis occurs in the cytoplasm of the cell and is present in all living organisms.
Additional Information
Krebs cycle
- The TCA cycle commonly known as Kreb's cycle occurs in the matrix of mitochondria.
- All the enzymes of the TCA cycle or Krebs cycle are present in the matrix of mitochondria except marker enzyme succinic dehydrogenase.
ATP synthesis
- The number of ATP molecules synthesized depends on the nature of the electron donor.
- Oxidation of one molecule of NADH gives rise to 3 molecules of ATP, while that of one molecule of FADH2 produces 2 molecules of ATP.
Electron transport chain
- The metabolic pathway through which the electron passes from one carrier to another is called the electron transport system (ETS).
- It is present in the inner mitochondrial membrane.
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Feb 20, 2025