Lactose on hydrolysis gives

Options

A. Two glucose molecules
B. Two galactose molecules
C. A galactose molecule and a fructose molecules
D. A galactose molecule and a glucose molecule

Answer

To solve the question "Lactose on hydrolysis gives," we need to understand the composition of lactose and the process of hydrolysis.

### Step-by-Step Solution:

1. **Identify the Composition of Lactose**:
- Lactose is a disaccharide sugar composed of two monosaccharides: glucose and galactose.
- Specifically, it consists of one molecule of β-D-galactose and one molecule of β-D-glucose.

2. **Understand Hydrolysis**:
- Hydrolysis is a chemical reaction that involves the breaking of a bond in a compound by the addition of water.
- In the case of lactose, hydrolysis will break the glycosidic bond between the glucose and galactose units.

3. **Perform the Hydrolysis**:
- When lactose undergoes hydrolysis, it reacts with water, leading to the formation of one molecule of β-D-galactose and one molecule of β-D-glucose.

4. **Write the Result**:
- Therefore, the products of lactose hydrolysis are:
- 1 molecule of β-D-galactose
- 1 molecule of β-D-glucose

5. **Select the Correct Option**:
- Based on the options provided, the correct answer is that lactose on hydrolysis gives one molecule of galactose and one molecule of glucose.

### Final Answer:
Lactose on hydrolysis gives β-D-galactose and β-D-glucose.