Which of the following microorganisms do NOT have a cell wall?

bacteria

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protozoa

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virus

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algae

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Solution

The correct option is B
protozoa

All algal, fungal and bacterial cells possess cell walls. Algal cell wall is mainly composed of cellulose, fungal cell wall comprises chitin and bacterial cell wall is mainly made up of lipopolysaccharides. Protozoans lack cell wall.

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