Question

Respiration differs from combustion in

• A. Liberating more energy as compared to combustion.
• B. Liberating of all the energy at once in contrast to combustion.
• C. Liberation of energy gradually in steps in contrast to combustion.
• D. Carbohydrates take part as the combustion substance.

Answer 1

Answer: (C)

Liberation of energy gradually in steps in contrast to combustion.

Respiration is the carbon-carbon bond breaking in which the energy is released in a variety of different step.

This energy is converted in the form of ATP that can be used again later.

Whereas combustion is a combination of an organic compound with oxygen and involves the production of a large amount of heat which cannot be harnessed.

This reaction is highly exothermic and the energy is lost as heat whereas in respiration the liberation of energy is slow and efficient.

So, the correct option is 'Liberation of energy gradually in steps in contrast to combustion.'