Which of the following is not found in all bacteria?
Correct answer: D. Capsule
- A. Cell membrane
- B. Nucleoid
- C. Ribosomes
- D. Capsule
Explanation
The capsule is a slimy, protective layer that surrounds some bacterial cells. It is composed of polysaccharides or similar materials and helps bacteria evade the host immune system and resist environmental stresses. However, not all bacteria possess capsules; it is a feature found in certain bacterial species but not in all. The capsule of a bacterium is a specific and well-defined structure. The capsule is a protective layer that surrounds the bacterial cell, located outside the cell wall (if present). It is composed of a gel-like substance, primarily consisting of polysaccharides or occasionally polypeptides.
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About Kingdom Prokaryotae
Kingdom Prokaryotae includes bacteria and cyanobacteria, organisms with no membrane-bound nucleus or membrane-bound organelles. It covers their cell wall, capsule, flagella, plasmids, forms of nutrition, binary fission, useful and harmful roles, and the differences between prokaryotic cells and eukaryotic cells.
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