Which one of the following is a non-reducing carbohydrate?
A
Sucrose
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B
Lactose
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C
Ribose 5-Phosphate
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D
Maltose
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Solution
The correct option is A Sucrose Carbohydrates that have a free aldehyde or keto group, are called reducing sugars. Whereas if there is no free aldehyde or keto group, then the carbohydrate is called a non-reducing sugar. Sucrose is an example of a non-reducing sugar. Maltose, lactose and ribose 5-phosphate are reducing sugars.