Question

Which statement is incorrect regarding Lactose?

Answer 1

which statement is incorrect regarding lactose ?

1. it is composed of β (D+) Galactose & β D(+) Glucose
2. it is reducing sugar
3. it is a disaccharide having eight OH groups
4. it has α glycosidic linkage of C₁ of glucose and C₄ of galactose.

solution : lactose is disaccharide derived from condensation of β (D+) galactose and β (D+) glucose which has eight OH groups . it forms β glycosides linkage of C₁ of glucose and C₄ of galactose.

all the simple sugars ( monosaccharides) like galactose , glucose , fructose are reducing sugers. so fusion of galactose and glucose gives lactose, is a reading sugar.

in above explanation of lactose, we get “it has α glycosidic linkage of C₁ of glucose and C₄ of galactose.” is incorrect statement.

Therefore option (4) is correct choice.