1. The cell
Mitochondria : Introduction :
• A single mitochondrion is present in unicellular green alga, Microsterias. Number of mitochondria varies from 50¬–50,000
per cell. Mitochondria of a cell are collectively known as chondriome
. Historical Account :
• C. Benda
(1897) gave the name Mitochondria (Mitos, thread + Chondrion, granules).
• Term ‘Bioplast’ for mitochondria was used by Altman. Ultrastructure :
• Mitochondria are rod shaped organelles, bounded by a double membrane envelope.
• The outer membrane is smooth, the inner membrane surrounds a central cavity of matrix
. Central cavity is filled with jel like substances
• Inner membranes folds are called cristae, these folding are tubular and called microvilli
• Mitochondria contain electron transport systems aggregated into compact structure. F1 particles or oxysome
, tennis racket like bodies on inner membrane involved in oxidation & phosphorylation.
• Kreb’s cycle occurs in mitochondria.
• Each particle is made up of base, stalk and head. Functions of Mitochondria :
• Mitochodria are called power plants
or power houses
or cellular furnaces
• Synthesis of ATP (Adenosine Tri-phosphate)
in mitochondria is called oxidative phosphorylation
• Mitochondria as place of cellular respiration was first observed by Hogeboom.
If you want to give information about online courses to other students, then share it with more and more on Facebook, Twitter, Google Plus. The more the shares will be, the more students will benefit. The share buttons are given below for your convenience.