Immediate source of energy for cellular respiration is:
Correct answer: B. ATP
- A. Lipids
- B. ATP
- C. Proteins
- D. Carbohydrates
Explanation
The immediate source of energy for cellular respiration is adenosine triphosphate, or ATP. ATP is a molecule that stores and releases energy in cells. During cellular respiration, the complex organic molecules, such as glucose, are gradually broken down in a series of enzymatic reactions. The energy released during these reactions is used to synthesize ATP from adenosine diphosphate (ADP) and inorganic phosphate (Pi).
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About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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