Which of the following is a spiral-shaped bacteria?
Correct answer: D. Spirochete
- A. Cocci
- B. Bacilli
- C. Streptococcus
- D. Spirochete
Explanation
Mainly, bacteria have three shapes: spherical, rod-shaped, and spiral. 1. Spherical: A coccus is a spherical bacteria. Examples of cocci are Streptococcus pneumonia, Neisseria meningitides. 2. Rod-shaped: Bacilli are straight or rod-shaped organisms. When curved into a form resembling a comma, they are known as vibrio, and when present as a stack of coins, they are known as a palisade. Examples of rod-shaped bacteria are Escherichia coli, Pseudomonas. 3. Spiral: Spirochetes are spiral bacteria that usually occur singly or in colonies. An example is Treponema pallidum.
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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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