Question
Which one of the following statements is not true regarding $$(+)$$ lactose?
A.
$$(+)$$ lactose is a $$\beta - $$ glycoside formed by the union of a molecule of $$D{\text{ - }}\left( + \right){\text{ - }}$$ glucose and a molecule of $$D{\text{ - }}\left( + \right){\text{ - }}$$ galactose
B.
$$(+)$$ lactose is a reducing sugar and does not exhibit mutarotation
C.
$$(+)$$ lactose, $${C_{12}}{H_{22}}{O_{11}}$$ contains $$8O - H$$ groups
D.
On hydrolysis $$(+)$$ lactose gives equal amount of $$D{\text{ - }}\left( + \right){\text{ - }}$$ glucose and $$D{\text{ - }}\left( + \right){\text{ - }}$$ galactose
Answer :
$$(+)$$ lactose is a reducing sugar and does not exhibit mutarotation
Solution :
Lactose is a reducing sugar and all reducing sugars show mutarotation.
Lactose is a reducing sugar and all reducing sugars show mutarotation.
