A disaccharide may contain different types of monosaccharide units.

True

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False

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Solution

The correct option is A True
A disaccharide may contain different types of monosaccharide units,
For example:- Sucrose and Lactose have different type of monosaccharide units
Sucrose = $α - D - G l u c o s e + β - D - F r u c t o s e$
Lactose = $β - D - G l u c o s e + β - D - G a l a c t o s e$
Trehlose and Maltose have same type of monosaccharide units.
Trehlose = $α - D - G l u c o s e + β - D - G l u c o s e$
Maltose = $α - D - G l u c o s e + α - D - G l u c o s e$

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