The mitochondrion is a cell organelle that is surrounded by a membrane. It is the site of cellular respiration. Thus, option A is correct.
What is cellular respiration?
Cellular respiration is the process that occurs in the mitochondrion of the cell where the glucose from the food consumed gets broken into various products to ultimately generate ATP (energy).
The mitochondrion is the site of cellular respiration that comprises glycolysis, TCA, and oxidative phosphorylation. They are a series of metabolic reactions that convert chemical energy.
It is a crucial process of the animal cell that uses oxygen to break the glucose molecule to yield energy. The energy is required by the organism to perform the various functions.
Therefore, option A. cellular respiration takes place within mitochondria.
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Your question is incomplete, but most probably your full question was, What process takes place within mitochondria?
A. cellular respiration
B. photosynthesis
C. protein assembly
D. reproduction
