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Class 9 Biology · Chapter 2 · Test 4

Viruses and Binomial Nomenclature

25 MCQs on Virus Structure, Classification Status, Prions, Viroids, Scientific Naming, and Rules of Binomial Nomenclature

MCQs

25 questions · 20 min · 25 marks

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Sample questions

The first 5 of 25. Try each one, then tap to see the answer.

  1. Question 1

    What is the basic structural nature of viruses?

    • AAcellular
    • BMulticellular
    • CProkaryotic
    • DEukaryotic
    Show answer

    Answer: A

    Viral particles are acellular and do not have cells or cellular organelles.

  2. Question 2

    What type of genetic material can a virus contain?

    • ADNA or RNA
    • BOnly DNA
    • COnly RNA
    • DBoth DNA and RNA in every virus
    Show answer

    Answer: A

    Viral genetic material may be either DNA or RNA.

  3. Question 3

    What surrounds the nucleic acid of a virus?

    • AProtein coat
    • BCell wall
    • CCell membrane
    • DChitin layer
    Show answer

    Answer: A

    The nucleic acid of a virus is surrounded by a protein coat.

  4. Question 4

    Why are viruses not included in the classification of living organisms?

    • AThey lack cellular structure and organelles
    • BThey are always multicellular
    • CThey contain cellulose
    • DThey cannot contain nucleic acid
    Show answer

    Answer: A

    Viruses are acellular and lack the cellular characteristics needed for classification into the major domains or kingdoms.

  5. Question 5

    Why can viruses not carry out their own metabolism?

    • AThey lack cellular machinery
    • BThey lack nucleic acid
    • CThey contain chlorophyll
    • DThey have cellulose walls
    Show answer

    Answer: A

    Viruses do not have the cellular machinery required for independent metabolism.

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