Question

The difference between respiration and combustion is related to respiration being:

• A. Multistep
• B. Enzyme controlled
• C. Intracellular
• D. All the above

Answer 1

The correct option is D All the above

Respiration	Combustion
1. Respiration is a biochemical process that occurs inside living cells.	1. It is a physicochemical process that is non-cellular.
2. It is a slow process that releases energy in small steps and is stored as ATP.	2. It is a fast process that releases energy in one step with an increase in temperature.
3. The process involves various enzymes.	3. No enzymes are involved in such a process.
4. A part of the energy is liberated as heat.	4. Most of the energy is liberated as heat.
5. Oxygen is used as an oxidant in the last step of the process.	5. Oxygen is used directly in the process
6. Respiration takes place at normal temperature.	6. Combustion takes place at high temperatures.

Thus, the correct answer is option D.