Question

Which one of the following statement is not true regarding (+) lactose?

• A. On hydrolysis, (+) lactose gives equal amount of D(+) glucose and D(+) galactose.
• B. (+) Lactose is a $\beta -$glucoside formed by the union of a molecules of D (+) glucose and a molecules of D(+) galactose.
• C. (+) Lactose is a reducing sugar and does not exhibit mutarotation.
• D. (+) Lactose ,$C_{12}H_{22}O_{11}$contain 8 – OH groups.

Answer 1

Answer: (C)

(+) Lactose is a reducing sugar and does not exhibit mutarotation.

Answer 2

(+) Lactose is a reducing sugar and all reducing sugar shows mutarotation.