The primary cell wall of a plant cell is composed mainly of
Correct answer: A. cellulose
- A. cellulose
- B. chitin
- C. peptidoglycan
- D. lignin
Explanation
Cellulose microfibrils, polymers of beta glucose, give the plant wall its strength, while chitin builds fungal walls and peptidoglycan bacterial ones. Lignin is a secondary strengthening chemical laid down later in woody tissue, not the primary wall material.
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About Animal and Plant Cell
Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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