Which gas is produced by respiration and by burning carbon?

Which gas is produced by respiration and by burning carbon?

• A. Oxygen
• B. Nitrogen
• C. Carbon Dioxide
• D. Methane

Answer: (C)

Carbon dioxide is the gas produced by both cellular respiration and burning carbon. In cellular respiration, cells break down glucose with oxygen to release energy, and carbon dioxide is released as a waste product along with water. In burning carbon, carbon reacts with oxygen to form carbon dioxide (C + O2 → CO2), so CO2 is released when fuels burn in enough oxygen. Oxygen is consumed in these processes, not produced, and nitrogen and methane don’t fit as typical products in this context. That’s why carbon dioxide is the gas described.

Carbon dioxide is the gas produced by both cellular respiration and burning carbon. In cellular respiration, cells break down glucose with oxygen to release energy, and carbon dioxide is released as a waste product along with water. In burning carbon, carbon reacts with oxygen to form carbon dioxide (C + O2 → CO2), so CO2 is released when fuels burn in enough oxygen. Oxygen is consumed in these processes, not produced, and nitrogen and methane don’t fit as typical products in this context. That’s why carbon dioxide is the gas described.