JEE Main202125 Feb 2021Morning ShiftChemistryBiomoleculesActual

Which of the glycosidic linkage between galactose and glucose is present in lactose?

Options

AC - 1 of glucose and C - 4 of galactose
BC - 1 of glucose and C - 6 of galactose
CC - 1 of galactose and C - 4 of glucose
DC - 1 of galactose and C - 6 of glucose

Correct answer

C. C - 1 of galactose and C - 4 of glucose

Step-by-step solution

Lactose is composed of a molecule of galactose joined to a molecule of glucose by a β-1,4-glycosidic linkage. It is a reducing sugar that is found in milk. In lactose linkage is formed between C 1 of galactose and C 4 of glucose.

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