Which of the following carbohydrates cannot be directly utilised by the human body as a source of energy?
A
Glucose
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B
Sucrose
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C
Glycogen
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D
Cellulose
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E
Starch
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Solution
The correct option is B Cellulose Cellulose cannot be directly utilised by the human body as a source of energy.Humans are unable to digest cellulose because the appropriate enzymes to breakdown the beta acetal linkages are lacking.No vertebrate can digest cellulose directly.