A sugar, that is not a disaccharide, among the following is
A
Lactose
B
Galactose
C
Sucrose
D
Maltose
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B
Galactose
b disaccharide is the sugar formed when two monosaccharides are joined by glycosidic linkage. Like monosaccharides, disaccharides are soluble in water. Three common examples are sucrose, lactose, and maltose. Galactose is a monosaccharide. When combined with glucose (monosaccharide), through a condensation reaction, the result is the disaccharide lactose. The hydrolysis of lactose to glucose and galactose is catalyzed by the enzymes lactase and $\beta$-galactosidase.
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A short peptide on complete hydrolysis produces $3$ moles of glycine $(G)$, two moles of leucine $(L)$ and two moles of valine $(V)$ per mole of peptide. The number of peptide linkages in it are $..............$.