Differentiate between the following.
Respiration and Combustion.

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Solution

Respiration
Combustion
1. Respiration takes place in living cells only. 1. Combustion does not take place in the living cell.
2. Respiration is carried out with the help of various enzymes. 2. Enzymes are not involved in this process.
3. The oxidation of food and the liberation of energy occur in a step-wise manner. 3. The substances are oxidized spontaneously with the sudden release of energy.
4. Respiration occurs at the body temperature of the organism. 4. In combustion sudden release of energy generates a high temperature due to heat.
5. 60% of energy escapes as body heat and 40% of energy is packaged directly into new chemical energy (ATP).
5. Energy released in combustion is dissipated as heat and to some extent as light.

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Respiration	Combustion
1. Respiration takes place in living cells only.	1. Combustion does not take place in the living cell.
2. Respiration is carried out with the help of various enzymes.	2. Enzymes are not involved in this process.
3. The oxidation of food and the liberation of energy occur in a step-wise manner.	3. The substances are oxidized spontaneously with the sudden release of energy.
4. Respiration occurs at the body temperature of the organism.	4. In combustion sudden release of energy generates a high temperature due to heat.
5. 60% of energy escapes as body heat and 40% of energy is packaged directly into new chemical energy (ATP).	5. Energy released in combustion is dissipated as heat and to some extent as light.