Using an input of energy from food molecules, the reactions of cellular respiration produce ______.
ATP
The reactions of cellular respiration produce energy (in the form of ATP) using an input of energy from food molecules. The process of cellular respiration involves three main stages: glycolysis, the citric acid cycle (also known as the Krebs cycle), and oxidative phosphorylation. During glycolysis, glucose is broken down into two molecules of pyruvate, which can be further processed in the next stages. In the citric acid cycle, pyruvate is converted into acetyl-CoA, which enters a cycle of reactions that produce ATP and other energy carriers. Finally, during oxidative phosphorylation, electrons harvested from the food molecules are used to create an electrochemical gradient across the mitochondrial membrane, which drives the synthesis of ATP. Together, these reactions encompass the process of cellular respiration, which provides the body with the energy it needs to carry out various cellular functions.
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