The cells of the non virulent strain of Streptococcus pneumonia are:
Correct answer: D. Non-capsulated and R-Type
- A. Capsulated and S-Type
- B. Non-capsulated and S-Type
- C. Capsulated and R-Type
- D. Non-capsulated and R-Type
Explanation
Streptococcus pneumoniae strains are classified into two main types based on their capsule:- S-type (Smooth-type): Capsulated, virulent strains with a smooth colony morphology.- R-type (Rough-type): Non-capsulated, non-virulent strains with a rough colony morphology.The capsule is a layer of polysaccharides surrounding the bacterial cell wall, which helps protect the bacteria from phagocytosis and is a key virulence factor. Non-virulent strains lack this capsule, making them more susceptible to host immune responses.
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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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