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Question

Common respiratory substrate is

A
Fructose
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B
Glucose
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C
Sucrose
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D
Lactose
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Solution

The correct option is D Glucose
Cellular respiration is a stepwise process that uses organic respiratory substrate to produce energy in the form of ATP. Glycolysis is the first step in cellular respiration in which glucose is broken down into pyruvic acid and energy is released. All other substrates are first converted to glucose before they can undergo glycolysis.
So, the correct answer is 'Glucose'.

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