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Question

Which of the following is a trisaccharide?

A
Rhamnose
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B
Monellin
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C
Stachyose
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D
Raffinose
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Solution

The correct option is D Raffinose
Raffinose is a trisaccharide made up of glucose, galactose and fructose joined together by 2 glycosidic bonds.
Stachyose is a tetrasaccharide made up of 1 glucose, 2 galactose and 1 fructose units joined together by 3 glycosidic bonds.
Monellin and thaumatin are proteins with high sweetening index. They are used as substitutes for sugar because of their high sweetness and low calorie intake.
Rhamnose is an exception to the general formula of carbohydrates (CH2O)n. It has a formula of C5H10O4.

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