The intine of a pollen grain is mainly made up of

Options

A. cellulose and pectin
B. lipid and pectin
C. pectin and lignin
D. lignin and cutin

Answer

### Step-by-Step Solution:

1. **Understanding Pollen Grain Structure**:
- Pollen grains consist of two main layers: the outer layer called the exine and the inner layer known as the intine.

2. **Identifying the Composition of Intine**:
- The intine is the inner layer of the pollen grain. It is crucial to know what materials make up this layer.

3. **Components of Intine**:
- The intine is primarily composed of two substances: cellulose and pectin. These components are essential for the structural integrity and function of the pollen grain.

4. **Differentiating Between Layers**:
- While the exine is made up of a tough substance called sporopollenin, the intine is more flexible and is made of cellulose and pectin.

5. **Conclusion**:
- Therefore, the intine of a pollen grain is mainly made up of cellulose and pectin.

### Final Answer:
The intine of a pollen grain is mainly made up of **cellulose and pectin**.

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