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Solution


Q.

Which one of the following is a non reducing carbohydrate      [2014]
1 Maltose  
2 Sucrose  
3 Lactose  
4 Ribose 5-phosphate  

Ans.

(2)

In non-reducing sugars, a free aldehyde or ketonic group is absent. Sucrose is a non-reducing sugar formed by condensation of one molecule each of glucose and fructose with release of a water molecule. A glycosidic bond is established between carbon atom 1 of glucose and carbon atom 2 of fructose.