Which of these is not true?

(a) Combustion is a faster process than respiration.
(b) Combustion occurs at a higher temperature than respiration.
(c) In combustion, energy is released in several steps, whereas in respiration it is released in a single step.
(d) Combustion can occur anywhere but respiration only occurs in living cells.

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Solution

(c) In combustion, energy is released in several steps, whereas in respiration, it is released in a single step.
Combustion releases energy in a single step in the form of light and heat. Whereas in respiration, energy is released in steps and is stored in the form of ATP.

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Similar questions

	Respiration	Combustion
a.	Respiration is a slow process.	Combustion is relatively a fast process.
b.	Respiration takes place at the body temperature.	Combustion takes place at the ignition temperature of the fuel.
c.	Respiration produces CO₂ + H₂O and energy.	Combustion of hydrocarbons always produces only CO₂.
d.	Respiration takes place inside a cell.	Combustion takes place outside a cell.
e.	Respiration takes place at all times.	Combustion only takes place when a fuel or a combustible substance burns.

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