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. 

Related Questions

Which of the following does not occur within mitochondria?