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Assertion: Lichen is especially found on rock, bark or poor soil all over the world.

Reason: They can withstand the extremes in temperatures.

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Important Questions on Biological Classification

EASY
Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
Select the wrong statement.
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Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
The proteinaceous infectious particle which can cause some serious animal diseases are called:
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Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens

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:

EASY
Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
Which of the following statements is wrong for viroids?
HARD
Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
Viroids differ from viruses in having:
EASY
Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
Which one of the following statements is true about viruses?
HARD
Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
What is the order of events that occur in a bacteriophage lytic cycle?
MEDIUM
Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
A pathogan which cannot be cultured in an artificial medium is:
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Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
Which of the following is correct about viroids?
EASY
Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens

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

Question Image

HARD
Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens

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 in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
Which of the following statements is incorrect?
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Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
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?
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Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
Creutzfeldt Jakob Disease CJD is a transmissible disease caused by a
EASY
Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
The genome of SARS-CoV2 is composed of
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Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
Viruses have
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Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
What is the genetic material of Ebola virus?
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Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
The capsid of tobacco mosaic virus (TMV) has capsomere numbering ___.
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Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
A location with luxuriant growth of lichens on the trees indicates that the:
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Biology>Diversity in the Living World>Biological Classification>Viruses, Viroids, Prions and Lichens
Which of the following are the most suitable indicators of SO2 pollution in the environment?