Which of these is a disaccharide?

Sucrose

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Glucose

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Fructose

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Galactose

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Solution

The correct option is D Sucrose
Sucrose is a disaccharide formed by the glycosidic linkage between glucose and fructose. The bond is formed between the between C $_{1}$ on the glucosyl subunit and C $_{2}$ on the fructose unit. It has no free aldehyde or keto group so they are known as non- reducing sugar. The anomeric carbon of glucose and fructose forms the glycosidic bonds.
So, the correct answer is option B.

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