Question

Lactose contains

• A. glucose+ glucose
• B. glucose.+ galactose
• C. glucose+ fructose
• D. glucose+ ribose.

Answer 1

Answer: (B)

It is a disaccharide of $\beta$-D-galactose and $\beta$-D-glucose which are held together by a glycosidic linkage between C-1 of galactose and C-4 of glucose.