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Which of the following carbohydrates found in food can be used as energy sources by living organisms?
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4. Biomolecules
Carbohydrates
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Which of the following is a polysaccharide?
A
Cellulose
B
Glucose
C
Sucrose
D
Fructose
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Understand the definition of a polysaccharide: Polysaccharides are large, complex carbohydrates composed of long chains of monosaccharide units linked together by glycosidic bonds. Examples include cellulose, starch, and glycogen.
Review the options provided: Glucose, Sucrose, Fructose, and Cellulose. Identify which of these are monosaccharides, disaccharides, or polysaccharides.
Classify each option: Glucose and Fructose are monosaccharides (simple sugars with the formula C₆H₁₂O₆). Sucrose is a disaccharide (composed of glucose and fructose linked together). Cellulose is a polysaccharide (a long chain of glucose molecules).
Focus on the structural characteristics of cellulose: Cellulose is a polysaccharide made of β-glucose units linked by β-1,4-glycosidic bonds, forming a rigid structure that is a key component of plant cell walls.
Conclude that the correct answer is Cellulose, as it is the only polysaccharide among the options provided.
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