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 can follow these steps:

### Step-by-Step Solution:

1. **Understand Cellulose Structure**:
- Cellulose is a polysaccharide, which means it is made up of many sugar units. Specifically, cellulose is composed of D-glucose units.

**Hint**: Remember that polysaccharides are long chains of monosaccharides linked together.

2. **Identify the Type of Linkage**:
- The D-glucose units in cellulose are connected by beta-glycosidic linkages. This type of linkage is important for the structure and properties of cellulose.

**Hint**: Glycosidic linkages can be alpha or beta; knowing the type helps in understanding the hydrolysis process.

3. **Hydrolysis Process**:
- Hydrolysis is a chemical process that involves the breaking of bonds in the presence of water. When cellulose undergoes complete hydrolysis, the beta-glycosidic bonds between the D-glucose units are broken.

**Hint**: Hydrolysis typically involves the addition of water to break down complex molecules into simpler ones.

4. **Products of Hydrolysis**:
- The complete hydrolysis of cellulose results in the formation of many D-glucose molecules. Since cellulose is made entirely of D-glucose units, the end product is D-glucose.

**Hint**: Think about what happens when you break down a chain into its individual components.

5. **Select the Correct Option**:
- Given the options, the correct answer is the one that states that cellulose gives D-glucose upon complete hydrolysis.

**Hint**: Always cross-check your answer with the options provided to ensure accuracy.

### Final Answer:
Cellulose gives D-glucose on complete hydrolysis.