Solved papers for NEET Biology NEET PYQ-Viruses Viroids and Lichens

done NEET PYQ-Viruses Viroids and Lichens Total Questions - 24

• question_answer1) Enzymes are absent in:               [AIPMT 2000]
  A)
  algae
  done clear
  B)
  fungi
  done clear
  C)
  cyanobacteria
  done clear
  D)
  viruses
  done clear
  View Answer play_arrow

• question_answer2) Small proteins produced by vertebrate cells naturally in response to viral infections and which inhibit mutliplication of viruses are called: [AIPMT 2000]
  A)
  immunoglobulins
  done clear
  B)
  interferons
  done clear
  C)
  antitoxins
  done clear
  D)
  lipoproteins
  done clear
  View Answer play_arrow

• question_answer3) Many scientists consider viruses as living entities because these:                                [AIPMT 2000]
  A)
  respire
  done clear
  B)
                   can cause diseases
  done clear
  C)
  reproduce (inside host)
  done clear
  D)
  respond to tough environment
  done clear
  View Answer play_arrow

• question_answer4) Tobacco mosaic virus is a tubular filament of size: [AIPMT 2003]
  A)
  300 × 20 nm
  done clear
  B)
  700 × 30 nm
  done clear
  C)
  300 × 10 nm    
  done clear
  D)
  300 × 5 nm
  done clear
  View Answer play_arrow

• question_answer5) ELISA is used to detect viruses where the key reagent is:                             [AIPMT 2003]
  A)
  DNA probe
  done clear
  B)
  RNAase
  done clear
  C)
  alkaline phosphatase
  done clear
  D)
  catalase
  done clear
  View Answer play_arrow

• question_answer6) Viruses are no more “alive” than isolated chromosomes because:                 [AIPMT 2003]
  A)
  they both require oxygen for respiration
  done clear
  B)
  both require the environment of a cell to replicate
  done clear
  C)
  they require both RNA and DNA  
  done clear
  D)
  they both need food molecules
  done clear
  View Answer play_arrow

• question_answer7) Which one of the following statements about viruses is correct?                    [AIPMT 2003]
  A)
  Viruses are obligate parasites       
  done clear
  B)
  Nucleic acid of viruses is known as capsid
  done clear
  C)
  Viruses possess their own metabolic system
  done clear
  D)
  All viruses contain both RNA and DNA
  done clear
  View Answer play_arrow

• question_answer8) Viruses that infect bacteria, multiply and cause their lysis, are called:    [AIPMT (S) 2004]
  A)
  lysozymes
  done clear
  B)
  lipolytic
  done clear
  C)
  lyric
  done clear
  D)
  lysogenic
  done clear
  View Answer play_arrow

• question_answer9) Which of the following statements is not true for retroviruses?                             [AIPMT (S) 2004]
  A)
  DNA is not present at any stage in the lifecycle of retroviruses
  done clear
  B)
  Retroviruses carry gene for RNA dependent DNA polymerase
  done clear
  C)
  The genetic   material   in   mature retroviruses is RNA
  done clear
  D)
  Retroviruses are causative agents for certain kinds of cancer in man
  done clear
  View Answer play_arrow

• question_answer10) There exists a dose association between the alga and the fungus within a lichen. The fungus: [AIPMT (S) 2005]
  A)
  fixes the atmospheric nitrogen for the alga
  done clear
  B)
  provides protection, anchorage and absorption for the alga
  done clear
  C)
  provides food for the alga
  done clear
  D)
  releases oxygen for the alga
  done clear
  View Answer play_arrow

• question_answer11) The causative agent of mad-cow disease is a: [AIPMT (S) 2006]
  A)
  bacterium
  done clear
  B)
  prion
  done clear
  C)
  worm
  done clear
  D)
  virus
  done clear
  View Answer play_arrow

• question_answer12) Which one of the following is a viral disease of poultry?                                     [AIPMT (S) 2007]
  A)
  Salmonellosis
  done clear
  B)
  Coryza
  done clear
  C)
  New castle disease
  done clear
  D)
  Pasteurellosis
  done clear
  View Answer play_arrow

• question_answer13) T O Diener discovered a       [AIPMT (S) 2009]
  A)
  free infectious RNA
  done clear
  B)
  free infectious DNA
  done clear
  C)
  infectious protein
  done clear
  D)
  bacteriophage
  done clear
  View Answer play_arrow

• question_answer14) 

  Given below is the diagram of a bacteriophage. [AIPMT (M) 2010]

  In which one of the options, all the four parts A, B, C and D are correct?

  A)

  	A	B	C	D
  	Tail fibres	Head	Sheath	Collar

  done clear
  B)

  Sheath

  Collar

  Head

  Tail fibres

  done clear
  C)

  Head

  Collar

  Sheath

  Tail fibres

  done clear
  D)

  Collar

  Tail fibres

  Head

  Sheath

  done clear
  View Answer play_arrow

• question_answer15) Virus envelope is known as     [AIPMT (S) 2010]
  A)
  capsid
  done clear
  B)
  virion
  done clear
  C)
  nucleoprotein
  done clear
  D)
  core
  done clear
  View Answer play_arrow

• question_answer16) Infectious proteins are present in [AIPMT (S) 2010]
  A)
  gemini viruses
  done clear
  B)
  prions
  done clear
  C)
  viroids
  done clear
  D)
  satellite viruses
  done clear
  View Answer play_arrow

• question_answer17) Which statement is wrong for viruses? [AIPMT (S) 2012]
  A)
  All are parasites
  done clear
  B)
  All of them have helical symmetry
  done clear
  C)
  They have ability to synthesize nucleic acids and proteins
  done clear
  D)
  Antibiotics have no effect on them
  done clear
  View Answer play_arrow

• question_answer18) Which of the following shows coiled RNA strand and capsomeres?                 [NEET 2014]
  A)
  Polio virus                     
  done clear
  B)
  Tobacco mosaic virus
  done clear
  C)
  Measles virus      
  done clear
  D)
  Retrovirus
  done clear
  View Answer play_arrow

• question_answer19) Viruses have                               [NEET 2014]
  A)
  DNA enclosed in a protein coat   
  done clear
  B)
  prokaryotic nucleus
  done clear
  C)
  single chromosome
  done clear
  D)
  Both DNA and RNA
  done clear
  View Answer play_arrow

• question_answer20) Which of the following viruses is not transferred through semen of an infected male? [NEET 2015]
  A)
  Hepatitis-B virus
  done clear
  B)
  Human immunodeficiency virus
  done clear
  C)
  Chikungunya virus
  done clear
  D)
  Ebola virus
  done clear
  View Answer play_arrow

• question_answer21) Select wrong statement.      [NEET (Re) 2015]
  A)
  The viroids were discovered by DJ Ivanowski.
  done clear
  B)
  WM Stanley showed that viruses could be crystallized.
  done clear
  C)
  The term 'contagium vivum fluidum' was coined by MW Beijerinek.
  done clear
  D)
  Mosaic disease in tobacco and AIDS in human being are caused by viruses.
  done clear
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• question_answer22) Which of the following statements is wrong for viroids?                               [NEET - 2016 Phase-I]
  A)
  They lack a protein coat
  done clear
  B)
  They are smaller than viruses
  done clear
  C)
  They cause infections
  done clear
  D)
  Their RNA is of high molecular weight
  done clear
  View Answer play_arrow

• question_answer23) Viroids differ from viruses in having: [NEET-2017]
  A)
  RNA molecules without protein coat
  done clear
  B)
  DNA molecules with protein coat
  done clear
  C)
  DNA molecules without protein coat
  done clear
  D)
  RNA molecules with protein coat
  done clear
  View Answer play_arrow

• question_answer24) Which of the following statements is incorrect? [NEET 2019]
  A)
  Infective constituent in viruses is the protein coat
  done clear
  B)
  Prions consist of abnormally folded proteins
  done clear
  C)
  Viroids lack a protein coat
  done clear
  D)
  Viruses are obligate parasites
  done clear
  View Answer play_arrow