Bacteriophages and Viral Structure
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Questions and Answers

What type of virus is bacteriophage?

  • A bacteria that infects other than bacteria
  • A virus that infects bacteria (correct)
  • A virus that infects cellular organisms
  • A bacteria that infects viruses

    • What is the shape of the head of a bacteriophage?

  • Polyhedral
  • Icosahedral
  • Helical
  • Both Polyhedral and Helical (correct)

    • What is the protein coat of a virus composed of?

  • Capsomere, which is made up of small subunits called capsid
  • Capsid, which is made up of small subunits called capsomere (correct)
  • Capsid, which is made up of small subunits called protein
  • Capsomere, which is made up of small subunits called genetic material

    • Who discovered viroids?

    <p>T.O. Diener in 1971</p> Signup and view all the answers

    What is the correct order of size from smallest to largest?

    <p>Viroid &lt; virus &lt; bacteria</p> Signup and view all the answers

    What causes BSE in cattle and CJD in humans?

    <p>Prions</p> Signup and view all the answers

    Which of the following characteristics is NOT common to all bacteria?

    <p>Lack of cell wall</p> Signup and view all the answers

    What is the incorrect statement about chemosynthetic autotroph bacteria?

    <p>They use solar energy for ATP production</p> Signup and view all the answers

    What is citrus canker?

    <p>A plant disease caused by bacteria</p> Signup and view all the answers

    Which of the following is NOT an economic importance of heterotrophic bacteria?

    <p>N2 fixing in Anabaena</p> Signup and view all the answers

    What is the correct labelling for A, B and C?

    <p>A = Heterocyst, B = Mucilagenous sheath, C = Nostoc</p> Signup and view all the answers

    Which of the following is a characteristic of blue-green algae?

    <p>Presence of chlorophyll a and b</p> Signup and view all the answers

    What was the basis of classification of organisms like bacteria, BGA, fungi, mosses, and ferns as 'Plants'?

    <p>Body organisation and nuclear structure</p> Signup and view all the answers

    How many of the following are prokaryotes: Bacteria, Mosses, Ferns, Fungi, Pteridophyta, blue green algae, Gymnosperms Angiosperm?

    <p>More than 4</p> Signup and view all the answers

    On what basis are bacteria grouped into categories?

    <p>Shape</p> Signup and view all the answers

    What type of nutrition is exhibited by organisms that synthesize their own food from inorganic substrates?

    <p>Autotrophic nutrition</p> Signup and view all the answers

    What is the correct statement about bacterial structure and behaviour?

    <p>Bacterial structure is simple while behaviour is complex.</p> Signup and view all the answers

    What is the shape of bacteria represented by 'a' in the given options?

    <p>Cocci</p> Signup and view all the answers

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