Question

Which of the following is not a characteristic of the process of combustion?

• A. Both need a source of energy to function.
• B. Both need to excrete urea to function smoothly.
• C. Both need to oxygen to extract energy.
• D. Both need to remove carbon dioxide to continue functioning.

Answer 1

The correct option is D

Both need to remove carbon dioxide to continue functioning.

Combustion is a fast chemical process in which a substance reacts rapidly with oxygen to release carbon dioxide and water. No enzymes are involved in this process and energy is released in the form of heat. So the process occurs at high temperature.

Cellular respiration is a slow process and occurs at room temperature. This process converts carbohydrates into carbon dioxide and water. These steps are catalysed by enzymes. Energy is released in steps and stored in a special molecule. No heat or light is produced.