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Mitochondria , Biology
It is the power house of the cell because they are the major centers of release of energy in the aerobic respiration.
Mitochondria and chloroplast both are antagonistic to each other. Chloroplast stores food stuffs energy during photosynthesis whereas mitochondria convert potential energy of food stuffs into kinetic energy during respiration.
(1880) in striped muscles of insects and he called it
Cytoplasmic granules .
The term "mitochondria" given by Benda.
first observed them in plants ( Nymphea)
related them with cell respiration.
called them power house of cell.
worked out ultrastructure of mitochondria.
discovered DNA in mitochondria & called it
. It is also known as orgenelle DNA.
Mitochondria can be stand by stained by Janus Green-B. After staining mitochondria seems Greenish blue.
Total mitochondria in a cell =
term given by
Life span of mitochondria is 5-10 days.
Average number of mitochondria in each cell is about 1000-1600.
Single mitochondrion present in
Microasterias (alga), Chlorella fusca (Green algae), Trypanosoma, Micromonas (Protozoans).
Less than 10 mitochondria present in
25 in sperm cell, 300-500 in
30000 in some oocyte, 50000 in giant amoeba (chaos chaos) &
in flight muscle cells.
SHAPE & SIZE
Mitochondria are spherical or filamentous in shape.
Smallest mitochondria are present in
Largest mitochondria are present in
( 20-40 m)
In human body largest mitochondria are present in
Size depends on activity of cell. Active cells (meristematic cells) have large mitochondria.
Posted Date: 10/5/2012 6:35:48 AM | Location : United States
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