MITOCHONDRIA

MITOCHONDRIA

• Mitochondria is a double walled structure. Each membrane is 60 Å thick and both membranes are separated by a 60–80Å inter membrane space.

• Size of the mitochondrion - 0.5 to 1 µ diameter, 5-7 µ in length.

• Shapes of mitochondria - Thread, rod, spherical, oval, branched thread like.

• Mitochondrion is surrounded by double membraned envelope.

• Mitochondrial membranes are lipoproteinaceous (lipids 25-35%, proteins 60-70%).

• Finger like or plate like infoldings of inner membrane into the matrix are called Cristae, or mitochondrial crests.
• Tennis racket shaped stalked particles which are attached over cristae and called - Oxysomes or F ₁ particles, or Elementary particles, or Fernandez-Moran particles.

• Function of Oxysomes - generation of ATP by oxidative phosphorylation.

• Molecules that come out frequently from mitochondrion - ATP.

• Mitochondria are considered as - bioplasts, cellular furnaces, power houses of the cell.
• ”A complex liquid fills the space between the two membranes.

Internal structure of mitochondria

• Its main function is to produce and store the energy in the form of ATP.

• It is the site of Kreb cycle of respiration.

• Oxysome contains enzymes for ATP production.

• Matrix contains enzymes for Kreb cycle.

Related Topics

• Plastid
• Cytoplasm
• Nucleus