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Question

Which of the following is not a disaccharide?

A
Cane sugar
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B
Raffinose
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C
Lactose
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D
Maltose
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Solution

The correct option is D Raffinose
Cane sugar contains glucose and fructose so it is a disaccharide.

Lactose contains glucose and galactose so it is a disaccharide.

Maltose contains glucose and glucose so it is a disaccharide.

Raffinose contains 1 unit of glucose, 1 unit of fructose and 1 unit of galactose so it is not a disaccharide. It is a trisaccharide.

Option B is correct.

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