OBJECTIVE LIFE SCIENCE
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Humans can digest starch but not cellulose because
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humans have enzymes that can hydrolyze the alpha glycosidic linkages of starch but not the beta glycosidic linkages of cellulose.
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the monomer of starch is glucose, while the monomer of cellulose isgalactose.
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humans have enzymes that can hydrolyze the beta
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the monomer of starch is glucose, while the monomer of cellulose ismaltose.
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Explanation:
Detailed explanation-1: -The correct answer is a) humans have enzymes that can hydrolyze the a-glycosidic linkages of starch but not the B-glycosidic linkages of cellulose. The human body uses enzymes called alpha-amylases to break down the alpha-glycosidic linkages of starch but they cannot break down beta-glycosidic linkages.
Detailed explanation-2: -Humans are only capable of digesting alpha linked glucose polymers, and are unable to break down beta linked polymers.
Detailed explanation-3: -Humans are unable to digest cellulose because we lack appropriate enzymes (cellulase) to break down this complex substance, cellulose. Undigestible cellulose is the fibre which aids in the smooth working of the intestinal tract.
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