Which process involves releasing energy from glucose with carbon dioxide and water as byproducts?

• A. Fermentation
• B. Digestion
• C. Respiration
• D. Photosynthesis

Answer: (C)

This question tests how energy is released from glucose in cells and what byproducts are produced. In cellular respiration, glucose is broken down step by step to carbon dioxide and water, and the energy released is captured as ATP to power cellular activities. In aerobic respiration, oxygen is used during the process, and the final waste products are carbon dioxide and water, which matches the description given. Photosynthesis does the opposite: it uses light energy to synthesize glucose and releases oxygen. Digestion merely breaks down food in the digestive system and isn’t about releasing energy from glucose as a metabolic end product. Fermentation can extract energy from glucose without oxygen, but its typical byproducts are ethanol or lactic acid and carbon dioxide, not water, so it doesn’t fit the described outcome.