JEE Main20206 Sep 2020Evening ShiftChemistryBiomoleculesActual
Which one of the following statement is not true?
Options
- ALactose contains α - glycosidic linkage between C 1 of galactose and C 4 of glucose
- BLactose is a reducing sugar and it gives Fehling's test.
- CLactose C 11 H 22 O 11 is a disaccharide and it contains 8 hydroxyl groups.
- DOn acid hydrolysis, lactose gives one molecule of D + - glucose and one molecule of D + - galactose.
Correct answer
A. Lactose contains α - glycosidic linkage between C 1 of galactose and C 4 of glucose
Step-by-step solution
The linkage is between C - 1 of Galactose and C - 4 of Glucose Lactose (Milk sugar) → H 3 O ⊕ β -galactose + β -glucose C 12 H 22 O 11 it is hydrolysed by dilute acids or by the enzyme lactase, to an equimolecular mixture of D + -glucose and D + -galactose. Lactose is a reducing sugar.