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Prokaryotes and viruses
5 Class 11 Biology questions with answers and explanations.
Printable worksheet with answer key
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Bacteria reproduce mainly by:
- 1 Meiosis
- 2 Mitosis
- 3 Binary fission
- 4 Spore formation only
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A virus consists of a protein coat and:
- 1 Genetic material
- 2 A cell wall
- 3 A nucleus
- 4 Mitochondria
Show answer
Correct answer: Genetic material
Viruses have DNA or RNA inside a protein coat.
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A virus that infects bacteria is a:
- 1 Bacteriophage
- 2 Retrovirus only
- 3 Fungus
- 4 Prion
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Gram positive bacteria stain:
- 1 Green
- 2 Purple
- 3 Pink or red
- 4 Not at all
Show answer
Correct answer: Purple
They have a thick cell wall that retains the crystal violet stain.
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Cyanobacteria carry out:
- 1 Nothing
- 2 Only fermentation
- 3 Only respiration
- 4 Photosynthesis