Question:
Intine, the inner wall of pollen grain is made up of
Intine, the inner wall of pollen grain is made up of
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• Exine → Sporopollenin
• Intine → Cellulose + Pectin
Updated On: May 13, 2026
- Cellulose and Pectin
- Cellulose and Lignin
- Pectin and Sporopollenin
- Sporopollenin and Cellulose
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The Correct Option is A
Solution and Explanation
Concept:
The pollen grain wall has two layers:
• Exine: Outer layer made of sporopollenin (highly resistant)
• Intine: Inner layer composed of cellulose and pectin
Step 1: Understanding pollen wall structure.
• Exine → Protective, tough layer
• Intine → Soft, involved in pollen tube formation
Step 2: Analyzing options.
• Cellulose and Pectin: Correct composition of intine.
• Cellulose and Lignin: Lignin is found in secondary cell walls, not pollen.
• Pectin and Sporopollenin: Sporopollenin belongs to exine.
• Sporopollenin and Cellulose: Mixed incorrect components.
Step 3: Selecting the correct answer.
Thus, intine is made of cellulose and pectin.
• Exine: Outer layer made of sporopollenin (highly resistant)
• Intine: Inner layer composed of cellulose and pectin
Step 1: Understanding pollen wall structure.
• Exine → Protective, tough layer
• Intine → Soft, involved in pollen tube formation
Step 2: Analyzing options.
• Cellulose and Pectin: Correct composition of intine.
• Cellulose and Lignin: Lignin is found in secondary cell walls, not pollen.
• Pectin and Sporopollenin: Sporopollenin belongs to exine.
• Sporopollenin and Cellulose: Mixed incorrect components.
Step 3: Selecting the correct answer.
Thus, intine is made of cellulose and pectin.
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