Which one of the following is a disaccharide?

Maltose

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Ribose

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Glucose

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Fructose

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Solution

The correct option is A Maltose
Monosaccharides are simple ("unit") sugars. Fructose, glucose and ribose are monosaccharides.
Disaccharides consist of molecules whose form is that of two monosaccharide molecules joined together. Maltose is a disaccharide formed from two units of glucose joined with an α(1→4) bond.

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