Lactose contains $$\alpha $$-glycosidic linkage between C₁ of galactose and C₄ of glucose

Lactose is a reducing sugar and it gives Fehling’s test

On acid hydrolysis, lactose gives one molecule of D(+)-glucose and one molecule of D(+)-galactose

Lactose (C₁₁H₂₂O₁₁) is a disaccharide and it contains 8 hydroxyl groups

Valine

Leucine

Lysine

Tyrosine

One acetal and one ketal

One ketal and one hemiketal

Two acetals

One acetal and one hemiacetal

Adenine and thymine

Thymine and proline

Adenine and lysine

Adenine and proline