Cell walls are the structure present exterior to the cell membrane. Animals lack cell wall but it is present in plants, bacteria, fungi , archaea, and algae. It is a rigid layer of polysaccharide that provides protection and support to the cell. The cell wall is composed of chitin (fungi), cellulose (plant) or peptidoglycan (bacteria).

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Chapter 3, Problem 7MCQ

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Cell walls are the structure present exterior to the cell membrane. Animals lack cell wall but it is present in plants, bacteria, fungi, archaea, and algae. It is a rigid layer of polysaccharide that provides protection and support to the cell. The cell wall is composed of chitin (fungi), cellulose (plant) or peptidoglycan (bacteria).

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