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(D) Inulin is a polysaccharide composed of fructose units. Fructose is a ketohexose, but in the context of carbohydrate classification, inulin is spec

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Inulin

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(D) Inulin is a polysaccharide composed of fructose units. Fructose is a ketohexose, but in the context of carbohydrate classification, inulin is specifically a fructan (polymer of fructose). However, the question asks for the unit that does not contain hexose sugar units. Sucrose is a disaccharide of glucose and fructose (both hexoses). Starch and glycogen are polymers of glucose (a hexose). Inulin is a polymer of fructose. Since fructose is a hexose, the question is technically tricky. However, in many biological contexts, inulin is distinguished because it is a polymer of fructose, whereas starch and glycogen are polymers of glucose. If the question implies 'glucose-based hexose units', then inulin is the answer. Inulin is a polymer of $D$-fructose units linked by $\beta(2 	o 1)$ glycosidic bonds.

Which of the following examples does not contain hexose sugar units?

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