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Question

Chemistry Question on Biomolecules

The linkage between the two monosaccharide units in lactose is

A

C1C_1 of β−D−\beta-D-glucose and C4C_4 of β−D−\beta-D-galactose

B

C1C_1 of β−D−\beta-D-galactose and C4C_4 of β−D−\beta-D-glucose

C

C1C_1 of α−D−\alpha-D-galactose and C4C_4 of β−D−\beta-D-glucose

D

C1C_1 of β−D−\beta-D-galactose and C4C_4 of α−D−\alpha-D-glucose

Answer

C1C_1 of β−D−\beta-D-galactose and C4C_4 of β−D−\beta-D-glucose

Explanation

Solution

C-1 of β\beta-D-galactose and C-4 of β\beta-D-glucose. In lactose, β\beta-D-gaiactose is joined to C-4 of β\beta-D-glucose.