Multiple choice

Which of the following is a non reducing sugar?

  1. Sucrose

  2. Maltose

  3. Lactose

  4. None of the above
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A Correct answer
Explanation

Sucrose is a non-reducing sugar because its glycosidic bond links the anomeric carbons of both glucose and fructose (C1 of glucose to C2 of fructose). This leaves no free anomeric carbon available to reduce other compounds. In contrast, maltose and lactose both have free anomeric carbons and act as reducing sugars.

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