Which part of the cell does glycolysis occur in?
Correct answer: C. Cytoplasm
- A. Mitochondrion
- B. Chloroplast
- C. Cytoplasm
- D. Nucleus
- E. Vacuole
Explanation
Glycolysis, the first stage of cellular respiration, occurs in the cytoplasm of the cell. It is a series of biochemical reactions that break down one molecule of glucose into two molecules of pyruvate. Unlike the subsequent stages of cellular respiration (such as the citric acid cycle and oxidative phosphorylation), glycolysis does not take place in the mitochondria. Instead, it occurs in the cytoplasm, which is the gel-like substance that fills the cell and surrounds the cellular organelles.
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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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