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10. Biomolecules — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry10. Biomolecules1 Mark
MCQ
A sugar, that is not a disaccharide, among the following is
  • A
    Lactose
  • ✓
    Galactose
  • C
    Sucrose
  • D
    Maltose
✓

Answer

Correct option: 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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