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it is a. food molecules

Answer: The correct answer is A) Food molecules.

Cellular respiration is a metabolic process that involves the oxidation of biological fuel ( like glucose) in presence of inorganic electron acceptor ( oxygen) in order to release large amount of energy in the form of ATP( adenosine triphosphate) that is upto 38 molecules. CO₂ and H₂O are produced as waste products. The energy from ATP is utilized for various cellular activities.

It is divided into three phase that is glycolysis ( occurs in cytoplasm), kreb cycle ( in mitochondrial matrix), and electron transport chain ( in inner mitochondrial membrane).

Therefore, cellular respiration releases energy by breaking down food molecules.

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