What is the end product of glycolysis?
Correct answer: A. Pyruvic acid
- A. Pyruvic acid
- B. C2H5OH
- C. CO2
- D. Glucose
Explanation
The end product of glycolysis is pyruvic acid because glycolysis is the process of breaking down one molecule of glucose into two molecules of pyruvic acid in the cytoplasm of the cell. This process occurs in both aerobic and anaerobic conditions and does not require oxygen. During glycolysis, glucose is converted into pyruvic acid through a series of enzyme-controlled reactions that also produce a small amount of energy in the form of ATP and NADH. Ethyl alcohol and carbon dioxide are not formed during glycolysis; they are produced later during fermentation, which occurs in the absence of oxygen. Glucose is also not a product because it is the starting molecule that is broken down in the process. Therefore, pyruvic acid is the direct end product of glycolysis.
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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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