C₃H₆O₃ is:
Correct answer: B. Lactic acid
- A. Pyruvic acid
- B. Lactic acid
- C. Ethyl alcohol
- D. Acetyl-CoA
Explanation
The chemical formula C₃H₆O₃ corresponds to lactic acid, which is produced during anaerobic respiration, particularly in muscle cells when oxygen is scarce. Pyruvic acid (C₃H₄O₃) is a different molecule that is converted into lactic acid during anaerobic conditions. Ethyl alcohol (ethanol) and acetyl-CoA have different chemical structures and roles in metabolism. Ethanol is a product of fermentation in yeast, and acetyl-CoA is a key metabolic intermediate, not a simple organic compound like lactic acid.
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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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