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Prokaryotes and viruses

Class 11 · Biology · 5 questions

Name: ____________________   Date: ____________

  1. Bacteria reproduce mainly by:

    • A Meiosis
    • B Mitosis
    • C Binary fission
    • D Spore formation only

  2. A virus consists of a protein coat and:

    • A Genetic material
    • B A cell wall
    • C A nucleus
    • D Mitochondria

  3. A virus that infects bacteria is a:

    • A Bacteriophage
    • B Retrovirus only
    • C Fungus
    • D Prion

  4. Gram positive bacteria stain:

    • A Green
    • B Purple
    • C Pink or red
    • D Not at all

  5. Cyanobacteria carry out:

    • A Nothing
    • B Only fermentation
    • C Only respiration
    • D Photosynthesis

Answer key

1. C, 2. A, 3. A, 4. B, 5. D

  1. A bacterial cell divides into two.

  2. Viruses have DNA or RNA inside a protein coat.

  3. A bacteriophage infects bacteria.

  4. They have a thick cell wall that retains the crystal violet stain.

  5. They are photosynthetic prokaryotes.