Consider the following statements in relation to respiration in animals: I. Glucose breaks down into pyruvate in the cytoplasm of all cells in both aerobic and anaerobic conditions. II. The energy released during anaerobic respiration is greater than the energy released in aerobic respiration. III. Carbon dioxide is released only in aerobic respiration. Which of the statements given above is/are correct?
I only
Statement I: Correct. Glucose is first broken down into pyruvate through glycolysis, which occurs in the cytoplasm of cells. This initial step takes place in both aerobic and anaerobic respiration.
Statement II: Incorrect. Anaerobic respiration releases less energy than aerobic respiration because glucose is only partially broken down in the absence of oxygen.
Statement III: Incorrect. Carbon dioxide release is not restricted only to aerobic respiration. It may also be produced during certain types of anaerobic respiration or fermentation.
Therefore, only Statement I is correct.
Correct Answer: I only
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