Mitochondria is a cell organelle with a membrane. It is a site of biochemical reactions and cellular respiration to yield energy. Thus, option A is correct.
Cellular respiration is a part of a metabolic reaction that produces energy in the form of ATP by splitting the glucose sugar molecule. The process of cellular respiration involves glycolysis, Krebs' cycle, and oxidative phosphorylation.
The processes of cellular respiration occur in the mitochondria of the cell, wherein the presence of oxygen, the sugar-like glucose breaks as an energy molecule. It also releases water and carbon dioxide as waste and byproducts.
Therefore, option A. the process of cellular respiration occurs in the mitochondrion of the cell.
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