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Question
Which one of the following is a reducing sugar?
Which one of the following is a reducing sugar?
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Solution
The correct option is B Glucose
- Glucose has a free aldehyde group which can be oxidized to the acidic groups. Hence, glucose is a reducing sugar. Starch and Cellulose are polysaccharides.
- They are comprised of multiple units of glucose linked together. The glucose in starch and cellulose does not contain a free aldehyde group and hence, starch and cellulose do not act as reducing sugars.
- Similarly, sucrose is a disaccharide in which the aldehyde group of glucose is used up in forming a bond between glucose and fructose.
- Hence, sucrose is also not a reducing sugar.
- Glucose has a free aldehyde group which can be oxidized to the acidic groups. Hence, glucose is a reducing sugar. Starch and Cellulose are polysaccharides.
- They are comprised of multiple units of glucose linked together. The glucose in starch and cellulose does not contain a free aldehyde group and hence, starch and cellulose do not act as reducing sugars.
- Similarly, sucrose is a disaccharide in which the aldehyde group of glucose is used up in forming a bond between glucose and fructose.
- Hence, sucrose is also not a reducing sugar.
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