1.

    Which statement about the structure of viroids is FALSE?

    A

    They are composed of double-stranded RNA.

    B

    They lack a protein coat.

    C

    They have a circular RNA molecule.

    D

    They are smaller than viruses.

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Biological Classification
    🎯Topic:Virus, Viroids,Prions And Lichens
    PYQ YEAR: 2020
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :viroids, RNA structure, viruses

    Related Questions

    1.

    Viruses contain

    A

    Only RNA

    B

    Only DNA

    C

    Either DNA or RNA

    D

    Neither DNA nor RNA

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Biological Classification
    🎯Topic:Virus, Viroids,Prions And Lichens
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :virus structure, nucleic acids, DNA, RNA

    2.

    The algal partner in a lichen is known as:

    A

    Mycobiont

    B

    Phycobiont

    C

    Cyanobiont

    D

    Bacteriobiont

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Biological Classification
    🎯Topic:Virus, Viroids,Prions And Lichens
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :0.5 mins
    πŸ”„Ncert Concepts :lichens, phycobiont, mycobiont

    3.

    A new infectious agent that is smaller than virus is

    A

    Prions

    B

    Viroids

    C

    bacteria

    D

    Mycoplasma

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Biological Classification
    🎯Topic:Virus, Viroids,Prions And Lichens
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Infectious agents, size comparison, viroids, prions, bacteria, mycoplasma

    4.

    Contagium vivum fluidum was proposed by

    A

    D.J. Ivanowsky

    B

    M.W. Beijerinck

    C

    Stanley

    D

    Robert Hooke

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Biological Classification
    🎯Topic:Virus, Viroids,Prions And Lichens
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :History of Virology, Scientific Discovery

    5.

    Which of the following statement is correct?

    A

    Viruses are obligate parasites

    B

    All fungi are pathogenic

    C

    All algae are eukaryotes

    D

    Bacteria are always harmful to mankind

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Biological Classification
    🎯Topic:Virus, Viroids,Prions And Lichens
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Viruses, Parasites, Fungi, Pathogens, Algae, Eukaryotes, Bacteria

    6.

    Select the true one about prions

    A

    Has RNA as genetic material

    B

    Abnormally folded proteins

    C

    Larger than viruses

    D

    RNA shape is same as in TMV

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Biological Classification
    🎯Topic:Virus, Viroids,Prions And Lichens
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Prions, Protein Structure, Genetic Material

    7.

    A place was rocky and barren but now there is a green forest, the sequence of origin is

    A

    Lichen, moss, herbs, shrubs

    B

    Moss, lichen, herbs, shrubs

    C

    Lichen, moss, shrubs, herbs

    D

    Shrubs, herbs, moss, lichen

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Biological Classification
    🎯Topic:Virus, Viroids,Prions And Lichens
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :ecological succession, pioneer species, plant community development

    8.

    Outer covering of virus made up of protein is

    A

    Capsid

    B

    Coat

    C

    Virion

    D

    Viriod

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Biological Classification
    🎯Topic:Virus, Viroids,Prions And Lichens
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Virus structure, Capsid

    9.

    HIV has a protein coat and genetic material

    A

    ssRNA

    B

    dsRNA

    C

    ssDNA

    D

    dsDNA

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Biological Classification
    🎯Topic:Virus, Viroids,Prions And Lichens
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :viral structure, nucleic acids, RNA, DNA

    10.

    ds RNA is found in

    A

    Reovirus

    B

    TMV

    C

    Ο• Γ—174

    D

    None of these

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Biological Classification
    🎯Topic:Virus, Viroids,Prions And Lichens
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Viral genomes, RNA viruses, dsRNA

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