Redox action takes place during the process of:
Correct answer: D. Both A and B
- A. Respiration
- B. Photosynthesis
- C. Growth
- D. Both A and B
Explanation
Redox reactions are crucial in both respiration and photosynthesis. In respiration, glucose is oxidized to produce energy, and oxygen is reduced to form water. In photosynthesis, water is oxidized, and carbon dioxide is reduced to form glucose. Therefore, both processes fundamentally rely on redox reactions, making Option D the correct choice. Growth, while essential for living organisms, does not primarily involve redox reactions, making Option C incorrect.
This question appeared on the ETEA MDCAT 2012 paper, which you can sit online with every answer explained.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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