Which of the following is a non-reducing sugar?

Starch

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Sucrose

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Maltose

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Galactose

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Solution

The correct option is B Sucrose
Non-reducing sugars do not have an OH group attached to the anomeric carbon so they cannot reduce other compounds. All monosaccharides such as glucose are reducing sugars. A disaccharide can be a reducing sugar or a non-reducing sugar. Maltose and lactose are reducing sugars, while sucrose is a non-reducing sugar.

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