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Cell Organelles - Mitochondria

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notes

Mitochondria:

  • They are small rod-shaped organelles.
  • It is a double membrane structure with outer membrane being smooth and porous whereas inner membrane being thrown into a number of folds called cristae.
  • They contain their own DNA and ribosomes.
  • They are absent in bacteria and red blood cells of mammals.

Functions:

  • They are the sites of cellular respiration, hence provide energy for the vital activities of living cells.

  • They store energy releases during reactions, in the form of ATP (Energy currency of the cell). Therefore, they are also called ‘power house’ of the cell.

Shaalaa.com | Cell Organelles - Mitochondria and plastids

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