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A: Cells use energy in order to grow, regulate metabolism and reproduce. This energy is obtained from a source such as food molecules or light from the sun, and through processes like glycolysis, the citric acid cycle and oxidative phosphorylation, an energy-rich molecule is then created.
Mitochondria are the power plants of the cell. The function of the mitochondria is to provide the chemical energy necessary to carry out the various cellular activities.Defects in the mitochondria structure or in the gene organization in the mitochondria lead to ill health and disease.unction of Mitochondria. The enzymes in the matrix break down carbohydrates and sugars to produce adenosine triphosphate (ATP). ATP molecules store the chemical energy required by the cell to carry out its metabolic functions. It is for this reason that the mitochondria are called the power plants of the cell.