What does cellulose give on complete hydrolysis?

Options

A. D - ribose
B. D - glucose
C. L - glucose
D. D - fructose

Answer

To solve the question "What does cellulose give on complete hydrolysis?", we need to understand the structure of cellulose and the process of hydrolysis.

### Step-by-Step Solution:

1. **Identify the Structure of Cellulose**:
- Cellulose is a polysaccharide made up of repeating units of beta-D-glucose. It is a linear, unbranched polymer formed by beta-1,4-glycosidic linkages between the glucose units.

**Hint**: Remember that cellulose is composed of glucose units linked together in a specific manner.

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

**Hint**: Hydrolysis is essentially the process of breaking down complex molecules into simpler ones using water.

3. **Perform Complete Hydrolysis**:
- When cellulose undergoes complete hydrolysis, the glycosidic bonds are broken, and the polymer is converted back into its monomer units, which are beta-D-glucose molecules.

**Hint**: Think of hydrolysis as reversing the process that formed the polymer.

4. **Determine the Product**:
- Since cellulose is made up entirely of beta-D-glucose units, complete hydrolysis will yield multiple molecules of beta-D-glucose.

**Hint**: Focus on the monomer unit of cellulose to find out what it produces upon hydrolysis.

5. **Select the Correct Option**:
- Among the options provided:
- A: D-ribose
- B: D-glucose
- C: L-glucose
- D: Fructose
- The correct answer is **Option B: D-glucose**, as this is the monomer unit obtained from the hydrolysis of cellulose.

**Hint**: Compare the options with the product of hydrolysis to identify the correct answer.

### Final Answer:
On complete hydrolysis, cellulose gives **beta-D-glucose**.