Which one of the following is a non-reducing carbohydrate?

Maltose

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Sucrose

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Lactose

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Ribose 5-phosphate

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Solution

The correct option is B Sucrose
The most common non-reducing sugar is Sucrose. The presence of aldehyde and ketone groups in the linkage between the glucose and fructose in the sucrose polymer, is responsible for the inability of sucrose to act as a reducing sugar.
So, the correct answer is option 'b'.

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