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The head of the bacteriophage has a protein coat called capsid which encloses a highly folded double-stranded DNA.

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Important Questions on Classification of Living Organisms

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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
What is the order of events that occur in a bacteriophage lytic cycle?
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids

Identify the parts labelled 1,2,3,4 in the given figure

Question Image

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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
The proteinaceous infectious particle which can cause some serious animal diseases are called:
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Which one of the following statements is true about viruses?
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Which of the following statements is wrong for viroids?
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Creutzfeldt Jakob Disease CJD is a transmissible disease caused by a
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
The capsid of tobacco mosaic virus (TMV) has capsomere numbering ___.
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Causal organism of the disease cucumber pale fruit is ______.
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Which of the following statements is incorrect?
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
A location with luxuriant growth of lichens on the trees indicates that the:
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids

Match the following lists:

  List I   List II
A) No sex organs, dikaryotic exogenous spores I) Gonyaulax
B) Infectious agents without nucleic acids II)  Trichodesmium
C) Differentiated cytoplasm bloom in polluted water bodies III) Slime moulds
D) Fruiting bodies bearing spores survive many years IV) Basidiomycetes
    V) Prions

The correct match is

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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Which of the following are the most suitable indicators of SO2 pollution in the environment?
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Leaf extract from an infected plant was passed through a filter with a pore size of 0.05μm diameter. The infectious agent was detected in the filtrate. Which ONE of the following is the likely infectious agent?
MEDIUM
Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids

Which of the following statements related to viruses are incorrect?

I. Antibiotics can kill viruses

II. Viruses are inactive outside the cell

III. Genes involved in viral metabolism are located in the viral genome

IV. Phages can multiply by two alternative mechanism, the lytic and the lysogenic cycle

The incorrect combination is:

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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
The genome of SARS-CoV2 is composed of
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Viruses have
MEDIUM
Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Virus that infect bacteria is called _____.
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Which of the following is correct about viroids?
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Viroids differ from viruses in having:
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Biology>Diversity of Living Organism>Classification of Living Organisms>Virus and Viroids
Select the wrong statement.