Oxygen, released into the atmosphere, comes from:
Correct answer: B. H2O
- A. CO2
- B. H2O
- C. C6H12O6
- D. CO2 and H2O
Explanation
Oxygen released into the atmosphere during photosynthesis comes from the splitting of water molecules. The oxygen-evolving complex in the thylakoid membrane of chloroplasts is responsible for catalyzing the light-dependent reactions of photosynthesis, where water molecules are split into oxygen, protons (H⁺ ions), and electrons.
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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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