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Questions and Answers
Which of the following is NOT a characteristic of bacteria?
Which of the following is NOT a characteristic of bacteria?
- They are microscopic single-celled organisms.
- They possess a cell wall made of cellulose. (correct)
- They lack mitochondria, chloroplasts, and other membrane-bound organelles.
- They lack a nucleus but contain a circular chromosome of DNA.
What is the function of a flagellum in bacteria?
What is the function of a flagellum in bacteria?
- To synthesize proteins
- To allow movement (correct)
- To store genetic information
- To provide structural support
What is a plasmid in a bacteria?
What is a plasmid in a bacteria?
- A small ring of DNA that contains extra genes. (correct)
- A protein that helps in cell division.
- A long, thin, whip-like tail that allows movement.
- A type of membrane-bound organelle.
Which of the following is an example of a spherical bacterium?
Which of the following is an example of a spherical bacterium?
What is the main difference between bacteria and animal cells?
What is the main difference between bacteria and animal cells?
Flashcards
Bacteria
Bacteria
Microscopic single-celled organisms with varied shapes.
Cell Wall
Cell Wall
Rigid layer made of peptidoglycan surrounding bacteria cells.
Circular Chromosome
Circular Chromosome
DNA structure that floats in the cytoplasm of bacteria.
Plasmids
Plasmids
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Flagella
Flagella
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Study Notes
Bacterial Cell Structure
- Bacteria are microscopic, single-celled organisms.
- They possess a cell wall (peptidoglycan), cell membrane, cytoplasm, and ribosomes.
- Bacteria lack a nucleus.
- They contain a circular chromosome of DNA within the cytoplasm.
- Plasmids (small rings of DNA) may be present, carrying additional genes.
- Bacteria lack mitochondria, chloroplasts, and other membrane-bound organelles.
- Some bacteria have flagella (whip-like tails) for movement.
Examples of Bacteria
- Lactobacillus: Rod-shaped bacterium used in yogurt production.
- Pneumococcus: Spherical bacterium causing pneumonia.
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