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Q.
'Power house' of the cell is called :
AFMCAFMC 2001
Solution:
Mitochondria are filamentous, rod shaped bodies of $3 - 5 \,\mu$ diameter and $40 \,\mu$ length, cytoplasmic cell organelles, occur only in eukaryotic cells. These are known as 'power house' of the cell; because, these are the sites of production of energy rich molecules called ATP (Adenosine Tri Phosphate). ATP is a high energy bound phosphate molecule it provides energy for approximately all biological processes, taking place within a cell.