NEET Biology The Living World / जीव जगत Question Bank

done Viruses Total Questions - 125

• question_answer1)
  The first to isolate plant virus was      [CPMT 1979; CBSE PMT 1993; BHU 1992]
  A)
             W.M. Stanley done clear
  B)
             E. C. Stackmann done clear
  C)
             A. K. Smith done clear
  D)
             Ivanowski done clear
  View Solution play_arrow

• question_answer2)
  The virus is made up of                                                    [BHU 2005]
  A)
             Protein done clear
  B)
             Nucleic acid done clear
  C)
           Both (a) and (b) done clear
  D)
             None of the above done clear
  View Solution play_arrow

• question_answer3)
  Caulimo virus (Cauliflower mosaic virus) are a group of viruses which have                                                [MP PMT 1990]
  A)
             Double stranded RNA done clear
  B)
             Single stranded RNA done clear
  C)
             Single stranded DNA done clear
  D)
             Double stranded DNA done clear
  View Solution play_arrow

• question_answer4)
  The rabies virus consists of                                              [BHU 1988]
  A)
             Single stranded RNA done clear
  B)
             Double stranded RNA done clear
  C)
             Single stranded DNA done clear
  D)
             Double stranded DNA done clear
  View Solution play_arrow

• question_answer5)
  Term "virion'' is used for
  A)
             Mycoplasma colony done clear
  B)
             Group of viruses done clear
  C)
             Nostoc colony done clear
  D)
             Single virus done clear
  View Solution play_arrow

• question_answer6)
  Which of the following is absent in virus
  A)
             Cell wall done clear
  B)
             Cell membrane done clear
  C)
             Cytoplasm done clear
  D)
             All the above done clear
  View Solution play_arrow

• question_answer7)
  Influenza virus has got
  A)
             Naked capsid done clear
  B)
             Enveloped capsid done clear
  C)
             Naked polyhedral capsid done clear
  D)
             No capsid at all done clear
  View Solution play_arrow

• question_answer8)
  The genetic material in viruses is       [CPMT 1994; MP PMT 1995, 98, 2000; CBSE PMT 1997; Pb. PMT 2000; BHU 2005]
  A)
             Only RNA done clear
  B)
             Only DNA done clear
  C)
             RNA and DNA both done clear
  D)
             RNA or DNA i.e. one nucleic acid in a virus done clear
  View Solution play_arrow

• question_answer9)
  Each capsomere of TMV contain amino acids whose number is
  A)
             158 done clear
  B)
             185 done clear
  C)
             815 done clear
  D)
             581 done clear
  View Solution play_arrow

• question_answer10)
  Ribovira is a group of viruses which contains
  A)
             dsDNA done clear
  B)
                                       ssDNA done clear
  C)
             RNA                                           done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer11)
  Which of the following is the smallest virus
  A)
             Foot and mouth virus done clear
  B)
             Tobacco mosaic virus done clear
  C)
             Coliphage lambda virus done clear
  D)
             Wound tumour virus done clear
  View Solution play_arrow

• question_answer12)
  Which of the following is the largest virus.
  A)
             Penicillium virus done clear
  B)
             Wound tumour virus done clear
  C)
             Pox virus done clear
  D)
             None of the above done clear
  View Solution play_arrow

• question_answer13)
  Which of the following is false                   [CBSE PMT 2005]
  A)
             Most plant viruses are RNA viruses done clear
  B)
             Most animal viruses are DNA viruses done clear
  C)
             TMV has double stranded RNA molecule done clear
  D)
             T4 bacteriophage has double stranded DNA molecule done clear
  View Solution play_arrow

• question_answer14)
  Dahlia mosaic virus has                     
  A)
             DNA                                          done clear
  B)
             RNA done clear
  C)
             DNA and RNA both                done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer15)
  Wound tumour virus has
  A)
             Double stranded DNA done clear
  B)
             Single stranded DNA done clear
  C)
             Double stranded RNA done clear
  D)
             Single stranded RNA done clear
  View Solution play_arrow

• question_answer16)
  Which of the following is a DNA containing plant virus [Pb. PMT 1999, 2000]
  A)
             Tobacco mosaic virus done clear
  B)
             Tomato mosaic virus done clear
  C)
             Cauliflower mosaic virus done clear
  D)
             Potato mosaic virus done clear
  View Solution play_arrow

• question_answer17)
  Algal viruses are known as                                   [CBSE PMT 1993]
  A)
             Binal viruses done clear
  B)
                                       Cyanophages done clear
  C)
             Mycophages done clear
  D)
                                       Phycophages done clear
  View Solution play_arrow

• question_answer18)
  Arthropod borne viruses are
  A)
             Ribo virus done clear
  B)
                                       Reo virus done clear
  C)
             Arbo virus done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer19)
  The substance which can deactivate the virus is called
  A)
           Viricide done clear
  B)
             Germicide done clear
  C)
             Antibiotic done clear
  D)
                                       Insecticide done clear
  View Solution play_arrow

• question_answer20)
  Who discovered synthesis of DNA from RNA in Rous sarcoma virus
  A)
             Smith done clear
  B)
                                       Temin done clear
  C)
             Twort done clear
  D)
                                       Meyer done clear
  View Solution play_arrow

• question_answer21)
  Helper virus is called
  A)
             Perfect phage of virus done clear
  B)
             A defective phage which helps another defective phage done clear
  C)
             A latent phage done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer22)
  Who discovered interferons
  A)
             Issacs and Lindmann               done clear
  B)
             Holmes and Knight done clear
  C)
             Harshey and Chase                 done clear
  D)
             Enders done clear
  View Solution play_arrow

• question_answer23)
  Absence of respiration is what type of character of a virus
  A)
             Living done clear
  B)
                                       Non-living done clear
  C)
             Intermediate done clear
  D)
                                       None of these done clear
  View Solution play_arrow

• question_answer24)
  Which of the following may produce the mutants
  A)
             Bacteria                                     done clear
  B)
             Virus done clear
  C)
             Fungi                                         done clear
  D)
             All the above done clear
  View Solution play_arrow

• question_answer25)
  Which of the following is called "filterable agent''
  A)
  Bacteria     done clear
  B)
             Virus done clear
  C)
             Fungi done clear
  D)
                                       All the above done clear
  View Solution play_arrow

• question_answer26)
  Protein of capsomeres is made up of
  A)
             Nucleic acids                             done clear
  B)
             Carbohydrates done clear
  C)
             Fats done clear
  D)
             Amino acids done clear
  View Solution play_arrow

• question_answer27)
  Who proposed the phanerogram of virus
  A)
             Lwoff and Tournier                  done clear
  B)
             W.M. Stanley done clear
  C)
             Weil et al done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer28)
  A cryptogram has got how many pairs of information
  A)
             1     done clear
  B)
             2 done clear
  C)
             3     done clear
  D)
             4 done clear
  View Solution play_arrow

• question_answer29)
  Cephaloridine may not act upon
  A)
             Virus                                          done clear
  B)
             Mycoplasma done clear
  C)
             Viroids                                       done clear
  D)
             All the above done clear
  View Solution play_arrow

• question_answer30)
  Most of the plant viruses are characterized in having                                     [AFMC 1993; DPMT 1993]
  A)
             DNA                                          done clear
  B)
             RNA done clear
  C)
             DNA and RNA done clear
  D)
                                       Lipids done clear
  View Solution play_arrow

• question_answer31)
  Virus was assigned its name by
  A)
             Dmitri Ivanowski                      done clear
  B)
             Adolf Mayer done clear
  C)
             M.W. Beijerinck                        done clear
  D)
             McKinney done clear
  View Solution play_arrow

• question_answer32)
  The filterable property of tobacco mosaic virus (TMV) was shown by                                           [MP PMT 1996]
  A)
             Ivanowsky                                 done clear
  B)
             Beijerinck done clear
  C)
             Stanley done clear
  D)
                                       Winogradsky done clear
  View Solution play_arrow

• question_answer33)
  Viruses were called Contagium vivum fluidum by
  A)
             de Herelle done clear
  B)
                                       Bawden and Pirie done clear
  C)
             Twort done clear
  D)
                                     Beijerinck done clear
  View Solution play_arrow

• question_answer34)
  The size of TMV is
  A)
             17.5 × 300 Å                           done clear
  B)
           17.5 × 300 Å done clear
  C)
             19.5 × 250 Å                           done clear
  D)
             19.5 × 250 Å done clear
  View Solution play_arrow

• question_answer35)
  The size of barley strip mosaic virus (BSMV) is
  A)
             130 × 30 nm                           done clear
  B)
             130 × 25 nm done clear
  C)
             130 × 30 Å                              done clear
  D)
             130 × 25 Å done clear
  View Solution play_arrow

• question_answer36)
  Capsid of  Adenovirus consists of
  A)
             250 capsomeres                 done clear
  B)
             252 capsomeres done clear
  C)
             254 capsomeres                       done clear
  D)
             256 capsomeres done clear
  View Solution play_arrow

• question_answer37)
  Genetic material in TMV is         [EAMCET 1993; MP PMT 2001]
  A)
             DNA                                          done clear
  B)
           RNA done clear
  C)
             Capsid                                       done clear
  D)
             Both DNA and RNA done clear
  View Solution play_arrow

• question_answer38)
  Which is not true for viruses
  A)
             Double stranded DNA done clear
  B)
             Double stranded RNA done clear
  C)
           Both DNA and RNA done clear
  D)
             Single stranded DNA done clear
  View Solution play_arrow

• question_answer39)
  One of the living symbols of virus is [KCET 1998]
  A)
           Obligate parasite                      done clear
  B)
             Sporophyte done clear
  C)
             Saprophyte                               done clear
  D)
             None of the above done clear
  View Solution play_arrow

• question_answer40)
  Temin worked on which virus                                         [BHU 2000]
  A)
             Herpesvirus                              done clear
  B)
             Rhinovirus done clear
  C)
             Retrovirus done clear
  D)
             Denguvirus done clear
  View Solution play_arrow

• question_answer41)
  The capsid of tobacco mosiac virus (TMV) has capsomers numbering                                          [KCET 2000]
  A)
             1230    done clear
  B)
             2130 done clear
  C)
             2310                                          done clear
  D)
             3120 done clear
  View Solution play_arrow

• question_answer42)
  Genetic material of reovirus is                   [Kerala CET  2001; Orissa JEE 2004]
  A)
             ds DNA                                     done clear
  B)
             ss DNA done clear
  C)
             ds RNA                                      done clear
  D)
             ss RNA done clear
  View Solution play_arrow

• question_answer43)
  Viruses multiply
  A)
             In vivo done clear
  B)
             In vitro done clear
  C)
             Both (a) and (b) done clear
  D)
                                       None of the above done clear
  View Solution play_arrow

• question_answer44)
  The viruses responsible for causing polio and hydrophobia are
  A)
           Neurotropic                              done clear
  B)
             Visrotropic done clear
  C)
             Dermotropic                             done clear
  D)
             Neumotropic done clear
  View Solution play_arrow

• question_answer45)
  The part of the virus which gives to it the hereditary feature, is                                       [BHU 1994; BVP 2003]
  A)
             Capsid                                       done clear
  B)
             Capsomere done clear
  C)
             Nucleic acid                              done clear
  D)
             Nucleotide done clear
  View Solution play_arrow

• question_answer46)
  Transmission of virus is through
  A)
             Tuber                                         done clear
  B)
             Rhizome done clear
  C)
             Cuttings                                     done clear
  D)
             Any of the above done clear
  View Solution play_arrow

• question_answer47)
  Vertical transmission of virus in human is through
  A)
             Placenta of mother                   done clear
  B)
             Sperms of the father done clear
  C)
             Both (a) and (b)                       done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer48)
  Grafting is a method to transmit
  A)
             Viral disease                             done clear
  B)
             Mycoplasmal disease done clear
  C)
             Viroid disease                    done clear
  D)
             All the above done clear
  View Solution play_arrow

• question_answer49)
  Viruses multiply in                                                                                             [BHU 1992, 2004; BVP 2001; EAMCET 1995]
  A)
             Bacteria only                             done clear
  B)
             All living cells done clear
  C)
             Specific living cells                   done clear
  D)
             Rotten food done clear
  View Solution play_arrow

• question_answer50)
  Which of the following is true for viruses [DPMT 1992]
  A)
             They invariably contain DNA done clear
  B)
           They multiply only in host cell done clear
  C)
             They occur only inside bacteria done clear
  D)
             Their genetic material is RNA done clear
  View Solution play_arrow

• question_answer51)
  The structure present in nature which is living and non-living both is
  A)
                                                       Protista                                      done clear
  B)
             Monera done clear
  C)
             Virus                                          done clear
  D)
             Bacteria done clear
  View Solution play_arrow

• question_answer52)
  Oral vaccine for polio was discovered by
  A)
             Sinsheimer                        done clear
  B)
             Salk and Sabin done clear
  C)
             Temin                                        done clear
  D)
             Lwoff done clear
  View Solution play_arrow

• question_answer53)
  Virusus usually infect the whole plant except the                                              [CBSE PMT 1993; MH CET 2000]
  A)
             Stem apex done clear
  B)
             Cortex done clear
  C)
             Pith done clear
  D)
             Phloem done clear
  View Solution play_arrow

• question_answer54)
  Potato tuber spindle disease is caused by
  A)
             Virus                                          done clear
  B)
             Viroid done clear
  C)
             Plasmid                                     done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer55)
  X?bodies were invented by
  A)
             Bittner                                        done clear
  B)
             Gross done clear
  C)
             Goldstein                                  done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer56)
  Gray matter of brain is affected by
  A)
             Measel virus                              done clear
  B)
             Varicella virus done clear
  C)
             Dengue fever virus                   done clear
  D)
             Encephalitis virus done clear
  View Solution play_arrow

• question_answer57)
  X?bodies are formed during infection of
  A)
             Bacteria                                     done clear
  B)
             Mycoplasma done clear
  C)
             Virus                                          done clear
  D)
             All the above done clear
  View Solution play_arrow

• question_answer58)
  Hydrophobia is caused by a                                  [CPMT 1991, 93]
  A)
             Bacterium                                  done clear
  B)
             Fungus done clear
  C)
             Virus                                          done clear
  D)
             Protozoan done clear
  View Solution play_arrow

• question_answer59)
  Our crops suffer from many diseases. Indicate the disease caused by virus                                   [BHU 1990]
  A)
             Potato mosaic done clear
  B)
             Citrus canker done clear
  C)
             Brown rot of potato done clear
  D)
             Leaf spot of cotton done clear
  View Solution play_arrow

• question_answer60)
  Banana bunchy top is caused by              [BHU 1989]
  A)
             Mycoplasma                             done clear
  B)
             Deutromycetes done clear
  C)
             Xanthomonas                           done clear
  D)
             Virus done clear
  View Solution play_arrow

• question_answer61)
  Interferon suppresses the pathogenic activity of                                                [CMC Vellore 1994; BVP 2000]
  A)
             Bacteria                                     done clear
  B)
             Viruses done clear
  C)
             Protozoans                                done clear
  D)
             Helminths done clear
  View Solution play_arrow

• question_answer62)
  The virus responsible for AIDS is an example of a (an)                                                                                   [MP PMT 1993]
  A)
             Adeno virus                              done clear
  B)
             Mosaic virus done clear
  C)
             T?even virus                             done clear
  D)
           Retrovirus done clear
  View Solution play_arrow

• question_answer63)
  Death of host cells due to viral infection is called
  A)
             Stunting                                     done clear
  B)
             Necrosis done clear
  C)
             Rosetting                                   done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer64)
  The interspersion  of various degrees of chlorosis with the normal green colour of the leaf is called
  A)
             Spotting                                     done clear
  B)
             Yellowing done clear
  C)
             Mosaic                                       done clear
  D)
             Rosetting done clear
  View Solution play_arrow

• question_answer65)
  'Flower distortion of carrot and onion' is caused by
  A)
             Fungi                                         done clear
  B)
             Mycoplasma done clear
  C)
           Virus                                          done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer66)
  Rugose mosaic of potato is caused by
  A)
             Potato virus?A                          done clear
  B)
             Potato virus?Y done clear
  C)
             Potato virus?X                          done clear
  D)
             (b) and (c) both done clear
  View Solution play_arrow

• question_answer67)
  From infected cells of .... interferon was invented
  A)
             Influenza virus                          done clear
  B)
             Rabies virus done clear
  C)
             Polio virus                                 done clear
  D)
             None of the above done clear
  View Solution play_arrow

• question_answer68)
  Which of the following is a viral disease  [MP PMT 2002]
  A)
             Small pox or polio done clear
  B)
             Malaria done clear
  C)
             Diphtheria done clear
  D)
             Tuberculosis done clear
  View Solution play_arrow

• question_answer69)
  On the basis of host attacked viruses are classified into                                 [MP PMT 1995]
  A)
             Two types                                 done clear
  B)
             Three types done clear
  C)
             Four types                                 done clear
  D)
             Five types done clear
  View Solution play_arrow

• question_answer70)
  The spread of AIDS disease is promoted by         [MP PMT 1995]
  A)
             Homosexuality done clear
  B)
             Immoral way of life done clear
  C)
             Use of infected needles in blood transfusion done clear
  D)
             All the above done clear
  View Solution play_arrow

• question_answer71)
  Mumps is a                                                                       [KCET 1994]
  A)
             Viral disease                             done clear
  B)
             Fungal disease done clear
  C)
             Bacterial disease                       done clear
  D)
             Protozoan disease done clear
  View Solution play_arrow

• question_answer72)
  Common cold is caused by                                      [EAMCET 1995]
  A)
             Bacteria                                     done clear
  B)
           Virus done clear
  C)
             Unicellular algae                      done clear
  D)
             Protozoa done clear
  View Solution play_arrow

• question_answer73)
  Influenza virus has                                                [CBSE PMT 1996]
  A)
             RNA                                           done clear
  B)
             DNA done clear
  C)
             Neither RNA nor DNA            done clear
  D)
             Both DNA and RNA done clear
  View Solution play_arrow

• question_answer74)
  Interferon is inhibitory to
  A)
             Bacteria                                     done clear
  B)
           Viruses done clear
  C)
             Fungi                                         done clear
  D)
             Algae done clear
  View Solution play_arrow

• question_answer75)
  AIDS is caused by
  A)
             Vaccinia virus                           done clear
  B)
             Viroid done clear
  C)
             HIV done clear
  D)
             Rhinovirus done clear
  View Solution play_arrow

• question_answer76)
  Potato leaf-roll disease is caused by [MP PMT 1999, 2002]
  A)
             Mycoplasma                      done clear
  B)
             Virus done clear
  C)
             Microspores done clear
  D)
             Bacterium done clear
  View Solution play_arrow

• question_answer77)
  Cotton stenosis is caused by
  A)
             Virus                                          done clear
  B)
             Mycoplasma done clear
  C)
             Bacteria                                     done clear
  D)
             Fungi done clear
  View Solution play_arrow

• question_answer78)
  Bacteriophage is made up of                     [DPMT 1983; CPMT 1971, 79, 84, 94; MP PMT 1989; Pb. PMT 2000]
  A)
             Carbon and nitrogen done clear
  B)
             DNA done clear
  C)
             Nucleoprotein (Nucleic acid + protein) done clear
  D)
             Protein only done clear
  View Solution play_arrow

• question_answer79)
  Which one is the smallest among the following                                                [CBSE PMT 1988]
  A)
             Bacteriophage                          done clear
  B)
             TMV done clear
  C)
             E. coli                                        done clear
  D)
             Neurospora done clear
  View Solution play_arrow

• question_answer80)
  Which of the virus has tadpole like shape
  A)
             TMV                                           done clear
  B)
             DMV done clear
  C)
             Human polio virus                   done clear
  D)
             Bacteriophage done clear
  View Solution play_arrow

• question_answer81)
  Which of the bacteriophage is a virulent
  A)
             Coliphage M12                          done clear
  B)
             l phage done clear
  C)
             T4 phage                                    done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer82)
  The enzymes formed by bacteriophage which ruptures the bacterial wall is
  A)
             Proenzymes                              done clear
  B)
             Phage?lysozymes done clear
  C)
             Endolysins                                done clear
  D)
             Phagoproteins done clear
  View Solution play_arrow

• question_answer83)
  The phage virus which has RNA as genetic material is
  A)
             T2 phage                                    done clear
  B)
             T4 phage done clear
  C)
             T6  phage                                   done clear
  D)
             MS2 phage done clear
  View Solution play_arrow

• question_answer84)
  Spikes and tail plate is absent in
  A)
             T2 phage                                    done clear
  B)
             T4 phage done clear
  C)
             Temperate phage                     done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer85)
  Virus with icosahedral head and helical tail is termed as
  A)
             TMV                                           done clear
  B)
             DMV done clear
  C)
           Bacteriophage                          done clear
  D)
             Variola virus done clear
  View Solution play_arrow

• question_answer86)
  The phage which does not destroy the host cell but infects it, is called
  A)
             Cyanophage                             done clear
  B)
             T2  phage done clear
  C)
             Virulent phage                          done clear
  D)
             l phage done clear
  View Solution play_arrow

• question_answer87)
  Which of the following was used by Hershey and Chase to prove that DNA is the chemical basis of heredity               [BHU 1981; AIIMS 1993; BVP 2003]
  A)
             TMV                                           done clear
  B)
             Cauliflower mosaic virus done clear
  C)
             Dahlia mosaic virus                 done clear
  D)
             T2 bacteriophage done clear
  View Solution play_arrow

• question_answer88)
  Genetic mapping of bacteriophage f × 174 has been done by
  A)
             Pirie and Bawden                    done clear
  B)
           F. Sanger done clear
  C)
             R.L. Sinsheimer                        done clear
  D)
             Salk and Sabin done clear
  View Solution play_arrow

• question_answer89)
  Coliphage T2 has                                                            [AFMC 1997]
  A)
             ssRNA                                       done clear
  B)
             ssDNA done clear
  C)
             dsRNA                                       done clear
  D)
             dsDNA done clear
  View Solution play_arrow

• question_answer90)
  Number of capsomeres in a T4 phage is
  A)
             2000                                          done clear
  B)
             1000 done clear
  C)
             2100                                          done clear
  D)
             2144 done clear
  View Solution play_arrow

• question_answer91)
  Zymophage remains parasite on
  A)
             Bacteria                                     done clear
  B)
             Algae done clear
  C)
           Yeast                                          done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer92)
  Bacteriophage which infects colon bacterium is
  A)
             Biophage                                  done clear
  B)
             Cyanophage done clear
  C)
             Coliphage                                 done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer93)
  An extreme example of latency in which DNA of the phage is integrated with the DNA of host cell chromosome is                                                                                           [DPMT 1993]
  A)
             Lysis                                          done clear
  B)
             Lysogeny done clear
  C)
             Attenuated virus                       done clear
  D)
             Prophage done clear
  View Solution play_arrow

• question_answer94)
  In cyanophage, the genetic material is     [BHU 1983]
  A)
             RNA                                           done clear
  B)
             DNA done clear
  C)
             RNA and DNA                         done clear
  D)
             Protein done clear
  View Solution play_arrow

• question_answer95)
  T2 phage has ....... capsomeres
  A)
             1000                                          done clear
  B)
             2000 done clear
  C)
             2100                                          done clear
  D)
             2144 done clear
  View Solution play_arrow

• question_answer96)
  Ultrastructure of bacteriophage?T was studied by
  A)
             R.L. Sinsheimer                        done clear
  B)
             S. Brenner done clear
  C)
             M. Schlesinger                          done clear
  D)
             None of the above done clear
  View Solution play_arrow

• question_answer97)
  Tail of bacteriophage is
  A)
             1000 × 200 Å in size           done clear
  B)
             1000 × 250 Å in size done clear
  C)
             1000 × 230 Å in size              done clear
  D)
             1000 × 300 Å in size done clear
  View Solution play_arrow

• question_answer98)
  Cyanophages attack                                       [MP PMT 1996, 2004]
  A)
             Cyanobacteria                          done clear
  B)
             Bacteria done clear
  C)
             Fungi                                         done clear
  D)
             Lichens done clear
  View Solution play_arrow

• question_answer99)
  The water of Holy Ganga, river is pure due to the presence of                                                        [MP PMT 1998]
  A)
             Cyanophages                           done clear
  B)
             Hydrophytes done clear
  C)
             Bacteria                                     done clear
  D)
             Bacteriophages done clear
  View Solution play_arrow

• question_answer100)
  Satellite virus is a
  A)
             Independent virus done clear
  B)
             Associated with an activator virus done clear
  C)
             Both (a) and (b) done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer101)
  Which of the following viruses is devoid of protein coat with their body constituted by only RNA         [NCERT 1989]
  A)
            Tobacco mosaic virus (TMV) done clear
  B)
                                      Potato spindle tuber virus (PSTV) done clear
  C)
            Polyoma virus done clear
  D)
            Mumps virus done clear
  View Solution play_arrow

• question_answer102)
  The Tobacco mosaic virus was crystallized for first time by                           [BHU 1989; MP PMT 1994]
  A)
             W.M. Stanley                            done clear
  B)
             Louis Pasteur done clear
  C)
             Edward Jenner                         done clear
  D)
             Andre Lwoff done clear
  View Solution play_arrow

• question_answer103)
  The protein coat of virus is called              [BHU 1999]
  A)
             Capsid done clear
  B)
             Cosmid done clear
  C)
             Capsomere                               done clear
  D)
             Chromophore done clear
  View Solution play_arrow

• question_answer104)
  The virus responsible for lysogenic growth cycle is
  A)
             Cyanophage done clear
  B)
             T2 phage done clear
  C)
             l phage                                     done clear
  D)
             All the above done clear
  View Solution play_arrow

• question_answer105)
  Which of the following sequence is found in Rous sarcoma virus                                  [MP PMT 1990]
  A)
             DNA ® RNA ® Protein done clear
  B)
             RNA ® RNA  ®Protein done clear
  C)
           RNA ® DNA ® RNA ® Protein done clear
  D)
             DNA ® DNA ® Protein done clear
  View Solution play_arrow

• question_answer106)
  A provirus is                                        
  A)
             Precursor of a viral particle done clear
  B)
             Prolonged viral infection done clear
  C)
             A symbiotic viral nucleic acid within the host genome done clear
  D)
             A dormant viral protein done clear
  View Solution play_arrow

• question_answer107)
  Sometimes when a virus attacks a bacterium, neither the virus multiplies nor the bacterium dies. This phenomenon is called as                                                                       [MP PMT 1998]
  A)
             Adsorption                                done clear
  B)
             Assimilation done clear
  C)
             Lysogeny                                  done clear
  D)
             Viral stability done clear
  View Solution play_arrow

• question_answer108)
  Which one of the following is the cause of yellow fever                                   [AMU 1990]
  A)
             Virus                                          done clear
  B)
             Bacteria done clear
  C)
             Protozoa                                    done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer109)
  Which of the following is a pandemic disease
  A)
             Amoebic dysentry                    done clear
  B)
             Hepatitis done clear
  C)
             Filariasis                                    done clear
  D)
             Influenza done clear
  View Solution play_arrow

• question_answer110)
  M12 phage is
  A)
             Avirulent                                   done clear
  B)
             Intermediate done clear
  C)
             Virulent                                     done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer111)
  Tailed bacteriophages are                                     [CBSE PMT 1995]
  A)
             Motile on surface of bacteria done clear
  B)
             Non-motile done clear
  C)
             Actively motile in water done clear
  D)
             Motile on surface of plant leaves done clear
  View Solution play_arrow

• question_answer112)
  A bacteriophage is                                   [MP PMT 1995, 98, 2002]
  A)
             A virus attacking a bacterium done clear
  B)
             A bacterium attacking a virus done clear
  C)
             A stage in the life-cycle of bacterium done clear
  D)
             A virus attacking another virus done clear
  View Solution play_arrow

• question_answer113)
  Phages that show lysogenic cycle are called            [MP PMT 1997]
  A)
             Temperate phages                   done clear
  B)
             Virulent phages done clear
  C)
                     Avirulent phages              done clear
  D)
                     Lytic phages done clear
  View Solution play_arrow

• question_answer114)
  Viruses that infect bacteria, multiply and cause their lysis, are called                                              [CBSE PMT 2004]
  A)
             Lytic                                           done clear
  B)
             Lysogenic done clear
  C)
             Lysozymes                                done clear
  D)
             Lipolytic done clear
  View Solution play_arrow

• question_answer115)
  Tobacco mosaic Virus (TMV) has    [AIEEE Pharmacy 2004;MHCET 2001; BVP 2002]
  A)
             A single stranded RNA molecule done clear
  B)
             A double stranded RNA molecule done clear
  C)
             A single stranded DNA molecule done clear
  D)
             A double stranded DNA molecule done clear
  View Solution play_arrow

• question_answer116)
  The genetic material of \[\varphi \times 174\]is                                                  [MH CET  2000]
  A)
             ss DNA done clear
  B)
             ds DNA done clear
  C)
             ss RNA                                      done clear
  D)
             ds RNA done clear
  View Solution play_arrow

• question_answer117)
  Virus that infects bacteria is called             [MH CET 2000]
  A)
             Bacteriophage                          done clear
  B)
             Cyanophage done clear
  C)
             Telophase                                 done clear
  D)
             Prophase done clear
  View Solution play_arrow

• question_answer118)
  Interferon is                                                                 [MH CET 2003]
  A)
             Bacteria                                     done clear
  B)
             Anti-Viral done clear
  C)
             Anti-algal                                   done clear
  D)
             Anti-bacterial done clear
  View Solution play_arrow

• question_answer119)
  Influenza is caused by                                                       [BVP 2001]
  A)
             Bacterium                                  done clear
  B)
             Virus done clear
  C)
             Fungus                                      done clear
  D)
             Cyanobacterium done clear
  View Solution play_arrow

• question_answer120)
  Interferons are produced in response to  [BVP 2004]
  A)
             Virus                                          done clear
  B)
             Bacteria done clear
  C)
             Helminthes                               done clear
  D)
             Malarial parasites done clear
  View Solution play_arrow

• question_answer121)
  Single stranded nucleic acid is found in   [BVP 2004]
  A)
             E. coli                                        done clear
  B)
             \[\varphi \times 174\] done clear
  C)
             \[\lambda \]                               done clear
  D)
             \[{{T}_{4}}\] done clear
  View Solution play_arrow

• question_answer122)
  Group of earliest photosynthetic organisms appeared during origin of life
  A)
             Probacteria                                done clear
  B)
             Protobacteria done clear
  C)
             Cyanobacteria                          done clear
  D)
             Primitive bacteria done clear
  View Solution play_arrow

• question_answer123)
  The viruses are known as                                       [CPMT 1976, 85]
  A)
             Unicellular                                done clear
  B)
             Acellular done clear
  C)
             Multicellular                              done clear
  D)
             Free genes done clear
  View Solution play_arrow

• question_answer124)
  The best supporting fact that "Viruses are living'' is that viruses                                       [NCERT 1978]
  A)
             Are made of chemicals            done clear
  B)
             Cause diseases done clear
  C)
             Duplicate themselves done clear
  D)
             Penetrate cell membrane done clear
  View Solution play_arrow

• question_answer125)
  Which of the following is not concerned with viruses                             [CPMT 1984]
  A)
             Viruses are made up of nucleic acid and proteins done clear
  B)
             Viruses multiply only in living host cell done clear
  C)
             Viruses can not use oxygen for respiration done clear
  D)
             Viruses can be grown in sugary liquid done clear
  View Solution play_arrow