(C) $(+)$ Lactose is a reducing sugar because it contains a hemiacetal group,which allows it to exist in equilibrium with its open-chain form.All redu

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

(C) $(+)$ Lactose is a reducing sugar because it contains a hemiacetal group,which allows it to exist in equilibrium with its open-chain form.All reducing sugars exhibit mutarotation in aqueous solution.Therefore,the statement that $(+)$ lactose does not exhibit mutarotation is false.

Class 12 Chemistry Biomolecules Carbohydrates

Medium

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

AIPMT 2011 All AIPMT

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 molecule of $D(+)$ glucose and a molecule of $D(+)$ galactose.
C
$(+)$ Lactose is a reducing sugar and does not exhibit mutarotation.
D
$(+)$ Lactose,$C_{12}H_{22}O_{11}$ contains $8-OH$ groups.