NEET Biology The Living World / जीव जगत Question Bank

done Critical Thinking Total Questions - 109

• question_answer1)
  Photosynthetic bacteria evolved on earth about ....... million years ago
  A)
  3300 to 3500                                      done clear
  B)
  3000 to 3300 done clear
  C)
  3500 to 3800                                      done clear
  D)
  3800 to 4000 done clear
  View Solution play_arrow

• question_answer2)
  If you go back in the history approx. 4500 million years back when atmosphere was reducing the organism were                [CPMT 2001; MP PMT 2001; BVP 2003; BHU 2003]
  A)
  Autotroph, aerobic                              done clear
  B)
  Chemo-autotroph, anaerobic done clear
  C)
  Chemo-heterotroph, anaerobic done clear
  D)
  Heterotroph, anaerobic done clear
  View Solution play_arrow

• question_answer3)
  One of the following can be used as an illustration to demonstrate process of evolution in animals         [DPMT 1992]
  A)
  Extinction of some animals like cheetah done clear
  B)
  Occurrence of tadpole in the life history of frog done clear
  C)
  Presence of egg laying mammals in Australia done clear
  D)
  Increasing incidents of DDT resistance in mosquitoes done clear
  View Solution play_arrow

• question_answer4)
  Organic evolution would have not been taken place                                       [DPMT 1992]
  A)
  If individuals in a population did not show genetic variations done clear
  B)
  If individuals did not inherit characters acquired during their life to their offsprings done clear
  C)
  If somatic variations did not inherit done clear
  D)
  If somatic variations were not transferred to genetic variations done clear
  View Solution play_arrow

• question_answer5)
  The process of evolution                                             [DPMT 1985]
  A)
  Is a continuous process done clear
  B)
  Is a discontinuous process done clear
  C)
  Was continuous in beginning but discontinuous now done clear
  D)
  Was discontinuous in beginning but continuous now done clear
  View Solution play_arrow

• question_answer6)
  Sympatric speciation is also known as
  A)
  Polyploidy done clear
  B)
  Hybridization done clear
  C)
  Allopatric species                                 done clear
  D)
  Isolation done clear
  View Solution play_arrow

• question_answer7)
  There are several ways of looking at living thing, one which is at the molecular level and analytical level with regard to life could vary nearly come to [CPMT 1973]
  A)
  Result of Newtonian laws done clear
  B)
  Matter energy interaction done clear
  C)
  Matter velocity relationship done clear
  D)
  Physical expression of moment of mass done clear
  View Solution play_arrow

• question_answer8)
  Most primitive living mammals which provide an evidence of organic evolution from geographical distribution are found in [AIIMS 1998]
  A)
  China done clear
  B)
  India done clear
  C)
  Australia    done clear
  D)
  Africa done clear
  View Solution play_arrow

• question_answer9)
  Trilobites were evolved during which of the following period          [CPMT 1999; MH CET 2000; BHU 2004]
  A)
  Salvian      done clear
  B)
  Cambrian done clear
  C)
  Ordovician                                           done clear
  D)
  Pre-cambrian done clear
  View Solution play_arrow

• question_answer10)
  Which one of the following evidences does not favour the Lamarckian concept of inheritance of acquired characters [CBSE PMT 1994; BHU 2000; MH CET 2003]
  A)
  Melanization in peppered moth in industrial areas done clear
  B)
  Presence of webbed toes in acquatic birds done clear
  C)
  Lack of pigment in cave?dwelling animals done clear
  D)
  Absence of limbs in snakes done clear
  View Solution play_arrow

• question_answer11)
  "In different races, there may be difference in culture and ways of living but capacity in all is the same''. It was the opinion of
  A)
  Darwin      done clear
  B)
  Wallace done clear
  C)
  Lamarck    done clear
  D)
  Shapiro done clear
  View Solution play_arrow

• question_answer12)
  Who wrote the book "Genetics and the Origin of Species''                              [MP PMT 1999]
  A)
  Devis  done clear
  B)
  Dobzhansky done clear
  C)
  Julian Huxley                                      done clear
  D)
  Fisher done clear
  View Solution play_arrow

• question_answer13)
  Adaptation of a species is its                                                                  [AIIMS  2001]
  A)
  Ecdysis      done clear
  B)
  Metamorphosis done clear
  C)
  Acquired character                              done clear
  D)
  Hereditary character done clear
  View Solution play_arrow

• question_answer14)
  Which one of the following sequences was proposed by Darwin and Wallace for organic evolution [CBSE PMT 2003]
  A)
  Variations, natural selection, overproduction, constancy of population size. done clear
  B)
  Overproduction, variations, constancy of population size, natural selection. done clear
  C)
  Variations, constancy of population size, overproduction, natural selection. done clear
  D)
  Overproduction, constancy of population size, variations, natural selection. done clear
  View Solution play_arrow

• question_answer15)
  What is the correct chronological sequence of human evolution
  A)
  Ramapithecus \[\to \] Australopithecus \[\to \] Homo erectus\[\to \] Neanderthal \[\to \] Homo sapiens sapiens done clear
  B)
  Ramapithecus \[\to \] Homo habilis \[\to \] Homo sapiens sapiens \[\to \] Homo erectus done clear
  C)
  Australopithecus\[\to \] Ramapithecus\[\to \]Homo habilis \[\to \] Homo sapiens sapiens done clear
  D)
  Homo habilis \[\to \] Australopithecus \[\to \] Homo erectus \[\to \] Homo sapiens sapiens done clear
  View Solution play_arrow

• question_answer16)
  Low and slopping fore head, skull with thick bones, deep lower jaw and absence of chin were present in
  A)
  Java man  done clear
  B)
  Neanderthal man done clear
  C)
  Cro-Magnon man                                done clear
  D)
  Homo habilis done clear
  View Solution play_arrow

• question_answer17)
  Fossils of which man were found in late pleistocene deposits in France, Java and South Africa
  A)
  Homo habilis                                       done clear
  B)
  Homo erectus done clear
  C)
  Java man  done clear
  D)
  Homo sapiens done clear
  View Solution play_arrow

• question_answer18)
  Peking man (Homo erectus pekinensis) was
  A)
  1.2 to 1.5 metres tall                           done clear
  B)
  1.65 to 1.75 metres tall done clear
  C)
  1.55 to 1.65 metres tall                       done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer19)
  Indicate the completely correct statement about human races                                         [CBSE PMT 1994]
  A)
  All human races can interbreed but most will produce infertile young ones done clear
  B)
  Different human races cannot interbreed done clear
  C)
  Some human races can interbreed done clear
  D)
  All human races can interbreed and produce fertile offspring done clear
  View Solution play_arrow

• question_answer20)
  Correct sequence of stages in the evolution of the modern man, (Homo sapiens), is [Pb. PMT 2000; Kerala PMT 2004]
  A)
  Neanderthal man, Australopithecus, Cro-magnon man, Homo erectus, modern man done clear
  B)
  Australopithecus, Homo erectus, Neanderthal man, Cro-magnon man, modern man done clear
  C)
  Homo erectus, Australopithecus, Neanderthal man, Cro-magnon man, modern man done clear
  D)
  Australopithecus, Neanderthal man, Cro-magnon man, Homo erectus, modern man done clear
  View Solution play_arrow

• question_answer21)
  Which one of the following sets represents the correct sequence of the evolution of man                           [MP PMT 2001]
  A)
  Kenyapithecus - Australopithecus -Homo habilis - Pithecanthropus - Homo sapiens done clear
  B)
  Kenyapithecus - Australopithecus -Pithecanthropus - Homo habilis -Homo sapiens done clear
  C)
  Australopithecus  - Kenyapithecus - Homo habilis - Pithecanthropus - Homo sapiens done clear
  D)
  Pithecanthropus - Australopithecus, Kenyapithecus - Homo habilis - Homo sapiens done clear
  View Solution play_arrow

• question_answer22)
  In recent years, DNA sequences (nucleotide sequence) of mt-DNA and Y chromosomes were considered for the study of human evolution, because                                                        [CBSE PMT 2003]
  A)
  They can be studied from the samples of fossil remains done clear
  B)
  They are small, and therefore, easy to study done clear
  C)
  They are uniparental in origin and do not take part in recombination done clear
  D)
  Their structure is known in greater detail done clear
  View Solution play_arrow

• question_answer23)
  The early stage human embryo distinctly possesses                           [AIIMS 2003]
  A)
  Gills    done clear
  B)
  Gill slits done clear
  C)
  External ear (Pinna)                            done clear
  D)
  Eye brows done clear
  View Solution play_arrow

• question_answer24)
  Which one of the following sequences is true                                                   [Pb. PMT 2000; VVMC Safdarjung 2001]
  A)
  Observations, problem defining, hypothesis, experiment done clear
  B)
  Experiment, hypothesis, problem defining, observation done clear
  C)
  Observation hypothesis problem defining, experiment done clear
  D)
  Problem defining, observation, hypothesis, experiment done clear
  View Solution play_arrow

• question_answer25)
  Which of the following relates to the determination of age of the tree by counting the number of annual rings       [AIIMS 1992; Kerala PMT 2001, 2003]
  A)
  Dendrology                                          done clear
  B)
  Cytochronology done clear
  C)
  Numerology                                         done clear
  D)
  Dendrochronology done clear
  View Solution play_arrow

• question_answer26)
  Study of rudimentary organs is                 [BCECE 1995]
  A)
  Etiology     done clear
  B)
  Dysteleology done clear
  C)
  Chirology  done clear
  D)
  Dermatology done clear
  View Solution play_arrow

• question_answer27)
  The branch of biology dealing with the process how to improve the human race by selective breeding is               [AFMC 1997; AIIMS 1997; Orissa JEE 2005]
  A)
  Euthenics  done clear
  B)
  Obstetrics done clear
  C)
  Euphenics done clear
  D)
  Eugenics done clear
  View Solution play_arrow

• question_answer28)
  Branch of zoology dealing with similarities and differences between individuals related by descent is
  A)
  Genetics    done clear
  B)
  Eugenics done clear
  C)
  Evolution  done clear
  D)
  Ecology done clear
  View Solution play_arrow

• question_answer29)
  One of the sciences for which training in biology is essential, namely the science of treating diseases with drugs or curative substances, is called                                                            [AMU 1999]
  A)
  Medicine   done clear
  B)
  Pharmacy done clear
  C)
  Pest control                                          done clear
  D)
  Physiotherapy done clear
  View Solution play_arrow

• question_answer30)
  In order to check purity of honey and its source, pollen grains are being studied in a sample of honey. Such a study is called as                                                                      [AMU 2000]
  A)
  Palynology                                           done clear
  B)
  Aeropalyonology done clear
  C)
  Melittopalynology                               done clear
  D)
  Latropalynology done clear
  View Solution play_arrow

• question_answer31)
  Match the names of branches of biology listed under column I with the field of study given under column II; choose the answer which gives the correct combiantion of the alphabets of the two columns                                          [KCET 2000] Column I Column II (Branch of biology)                             (Field of study) A         Palynology                                p     Silkworms B         Oncology                                  q     Pollens C         Phycology                                 r      Cancer D        Sericulture                                 s      Algae
  A)
  A = s, B = q, C = r, D = p done clear
  B)
  A = q, B = r, C = s, D = p done clear
  C)
  A = s, B = r, C = q, D = p done clear
  D)
  A = r, B = q, C = s, D = p done clear
  View Solution play_arrow

• question_answer32)
  Palynology is the study of                                                                      [RPMT 1998]
  A)
  Roots done clear
  B)
  Seeds done clear
  C)
  Polination in plants                             done clear
  D)
  Spores and pollen grains done clear
  View Solution play_arrow

• question_answer33)
  The branch which is associated with diagnosis, prevention and cure of mental disorders is                       [AIIMS 1997]
  A)
  Neurology done clear
  B)
  Psychiatry done clear
  C)
  Psychology                                           done clear
  D)
  Neuropsychiatry done clear
  View Solution play_arrow

• question_answer34)
  The science that deals with rearing and proper management of forest trees is called as  [MP PMT 1998; AMU 1991; Orissa JEE 1991, 2002]
  A)
  Apiculture done clear
  B)
  Sericulture done clear
  C)
  Agriculture done clear
  D)
  Silviculture done clear
  View Solution play_arrow

• question_answer35)
  The study of the kind and diversity of organisms and the existing relationship among them is called       [AMU 1991]
  A)
  Systematics                                           done clear
  B)
  Taxonomy done clear
  C)
  Classification                                        done clear
  D)
  Nomenclature done clear
  View Solution play_arrow

• question_answer36)
  The government sponsored programme for growing trees in towns and cities for aesthetic value is called               [AMU 1999]
  A)
  Floriculture                                           done clear
  B)
  Agroforestry done clear
  C)
  Social forestry                                      done clear
  D)
  Urban forestry done clear
  View Solution play_arrow

• question_answer37)
  The taxonomic status of an organism can be changed by Changing                                              [AFMC 2002]
  A)
  Anatomy   done clear
  B)
  Physiology done clear
  C)
  Morphology                                         done clear
  D)
  Genetic make-up done clear
  View Solution play_arrow

• question_answer38)
  Match the following by using codes: [Assam CEE 2001] A.        Vernalization                                  ?            1. Camerarius B.        Double fertilization                        ?            2. Hofmeister C.        Pollination                                      ?            3. Lysenko D.       Alternation of Generations           ?            4. Nawaschin
  A)
             \[\begin{matrix}    \begin{matrix}    A & B & C  \\ \end{matrix} & D  \\    \begin{matrix}    1 & 2 & 4  \\ \end{matrix} & 3  \\ \end{matrix}\]                                      done clear
  B)
             \[\begin{matrix}    \begin{matrix}    A & B & C  \\ \end{matrix} & D  \\    \begin{matrix}    4 & 1 & 2  \\ \end{matrix} & 3  \\ \end{matrix}\] done clear
  C)
             \[\begin{matrix}    \begin{matrix}    A & B & C  \\ \end{matrix} & D  \\    \begin{matrix}    3 & 2 & 1  \\ \end{matrix} & 4  \\ \end{matrix}\]                                      done clear
  D)
             \[\begin{matrix}    \begin{matrix}    A & B & C  \\ \end{matrix} & D  \\    \begin{matrix}    3 & 4 & 1  \\ \end{matrix} & 2  \\ \end{matrix}\] done clear
  View Solution play_arrow

• question_answer39)
  A mathematical explanation of enzyme action on substrate was formulated by                                            [Kerala PMT 2003]
  A)
  Van't Hoff  done clear
  B)
  Hans Krebs done clear
  C)
  Hans Gaffron                                       done clear
  D)
  Melvin Calvin done clear
  E)
  (e)       Leonor Michaelis and Maud Menten done clear
  View Solution play_arrow

• question_answer40)
  It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material. This is written by [Kerala PMT 2003]
  A)
  Severo Ochoa                                      done clear
  B)
  Archibold Garrod done clear
  C)
  Watson and Crick                                done clear
  D)
  Beadle and Tatum done clear
  E)
  (e)       Meselson and Stahl done clear
  View Solution play_arrow

• question_answer41)
  A pregnant woman who has done aminocentesis test finds an extra Barr body in her embryo. The syndrome which is likely to be associated with the embryois                                [AIIMS 1997]
  A)
  Down syndrome                                 done clear
  B)
  Patau syndrome done clear
  C)
  Edward syndrome                               done clear
  D)
  Klinefelter syndrome done clear
  View Solution play_arrow

• question_answer42)
  Match the branches of Biology listed in column I with the areas of study listed in column II. Choose the answer which gives the correct combination of alphabets of the two columns                                                                   [KCET 2003]

  Column I (Branches of Biology)	Column II (Area of Study)
  A Helminthology	p Study of insects
  B Entomology	q Study of fungi
  C Ornithology	r Study of algae
  D Phycology	s Study of birds
  	t Study of worms

  A)
  A = p, B = s, C= q, D = t done clear
  B)
  A = t, B = p, C = s, D = r done clear
  C)
  A = s, B = t, C =r, D = p done clear
  D)
  A = r, B = p, C = s, D = q done clear
  View Solution play_arrow

• question_answer43)
  Species is                                                     [AFMC 2002]
  A)
  Population of individuals having same genotypes and phenotypes done clear
  B)
  A group of individuals inhabiting a geographical area done clear
  C)
  A group of interbreeding populations done clear
  D)
  Population of one type done clear
  View Solution play_arrow

• question_answer44)
  Which of the following hierarchy is correct with reference to levels of biological organization   
  A)
  Species \[\to \]Communities \[\to \] Populations \[\to \] Ecosystems \[\to \]Landscapes \[\to \]Biosphere done clear
  B)
  Species \[\to \] Populations \[\to \] Communities \[\to \] Ecosystems \[\to \] Landscapes \[\to \] Biosphere done clear
  C)
  Species \[\to \] Populations \[\to \] Ecosystems \[\to \] Landscapes \[\to \] Communities \[\to \] Biosphere  done clear
  D)
  Species \[\to \] Population \[\to \] Communities \[\to \] landscapes \[\to \] Biosphere \[\to \] Ecosystems done clear
  View Solution play_arrow

• question_answer45)
  Molecules are always moving. Some molecules move faste than others,.........is a measure of their average velocity of movement      
  A)
  Density      done clear
  B)
  Polarity done clear
  C)
  Electronegativity                                  done clear
  D)
  Temperature done clear
  View Solution play_arrow

• question_answer46)
  A substance that...........is considered to be a chemical compound   
  A)
  Has covalent bonds done clear
  B)
  Has a chemical bond done clear
  C)
  Has a stable valence shell                   done clear
  D)
  Contains at least two different elements done clear
  View Solution play_arrow

• question_answer47)
  If a pair of shared electrons are more attracted to one nucleus than to the other, they form a/an......bond.               
  A)
  Polar covalent                                      done clear
  B)
  Ionic done clear
  C)
  Nonpolar covalent                              done clear
  D)
  Hydrogen done clear
  View Solution play_arrow

• question_answer48)
  Most of the unique properties of water result from the fact that water molecules         
  A)
  Are very small                                      done clear
  B)
  Tend to stick together done clear
  C)
  Easily separate from one another done clear
  D)
  Are held together by covalent bonds done clear
  View Solution play_arrow

• question_answer49)
  Mixture of oil in water forms an emulsion. If a protein is shaken up with such an emulsion      
  A)
  The emulsion gets stabilized done clear
  B)
  Protein molecules settle down done clear
  C)
  Coalescence of oil particles takes place done clear
  D)
  A thin film of protein molecules is formed on the surface done clear
  View Solution play_arrow

• question_answer50)
  Organic compounds are present in all living cells. They all share the following characteristic    
  A)
  Are hydrophobic done clear
  B)
  Are biological catalysts done clear
  C)
  Are used in protein synthesis done clear
  D)
  Are composed of carbon atom backbone surrounded by hydrogen atoms done clear
  View Solution play_arrow

• question_answer51)
  Which statement is correct for biomolecules                                        [RPMT 2001]
  A)
  DNA is a polymer of ribonucleotides done clear
  B)
  All carbohydrates break down into glucose done clear
  C)
  RNA is single stranded and contain different purine base than DNA done clear
  D)
  Sequence of amino acids determine primary structure of proteins done clear
  View Solution play_arrow

• question_answer52)
  Carbohydrates, lipids and protein are formed from their basic building blocks by      
  A)
  Addition of carbon to each molecule done clear
  B)
  Addition of oxygen to each molecule done clear
  C)
  Removal of a water molecule between building blocks done clear
  D)
  Addition of a water molecule between building blocks done clear
  View Solution play_arrow

• question_answer53)
  Match the names of biomolecules listed under column I with the characteristics given under column II; choose the answer which gives the correct combination of the alphabets of the two columns

  Column I (Biomolecule)	Column II (Characteristics)
  A     ATP	p       One or more sugar monomers
  B     DNA                              gf	q       The main source of energy
  C     Protein	r        Two strands of nucleotides
  D     Carbohydrate	s        Long sequence of amino acids

  A)
  A = s, B = q, C = r, D = p done clear
  B)
  A = q, B = r, C = s, D = p done clear
  C)
  A = s, B = r, C = q, D = p done clear
  D)
  A = r, B = q, C = s, D = p done clear
  View Solution play_arrow

• question_answer54)
  Match the names of items listed under column I with the items given under column II; choose the answer which gives the correct combination of the alphabets of the two columns

  Column I	Column II
  A         Ketone	p         has 5 carbon sugar, a phospphate group and a nitrogenous base
  B         Fatty acid	q         has long chain of carbon and hydrogen atoms and a carboxyl group at one end
  C         Aldehyde	r          has a carbonyl group at the end of the carbon chain
  D        Nucleotide	s          has a carbonyl group within the carbon chain

  A)
  A = s, B = q, C = r, D = p done clear
  B)
  A = q, B = r, C = s, D = p                done clear
  C)
  A = s, B = r, C =q, D = p                 done clear
  D)
  A = r, B = q, C = s, D = p done clear
  View Solution play_arrow

• question_answer55)
  Which is correct about energy changes in living cells                         [AMU 2001]
  A)
  First energy transfer, then energy transformation done clear
  B)
  First energy transformation, then energy transfer done clear
  C)
  Both occur discontinuously done clear
  D)
  Both occur continuously done clear
  View Solution play_arrow

• question_answer56)
  A closed system is one which           
  A)
  Continuously exchange matter and energy with the surrounding done clear
  B)
  Cannot exchange matter and energy with the surrounding done clear
  C)
  Can exchange energy but not matter with the surrounding               done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer57)
  Organisms which obtain energy by the oxidation of reduced inorganic compounds are called                 [CBSE PMT 2002]
  A)
  Saprozoic done clear
  B)
  Chemoautotrophs done clear
  C)
  Photoautotrophs                                 done clear
  D)
  Coproheterotroph done clear
  View Solution play_arrow

• question_answer58)
  Cells acquire and use energy to synthesize, store and degrade and eliminate substance through chemical reactions called
  A)
  Metabolism                                          done clear
  B)
  Homeostasis done clear
  C)
  Metastasis  done clear
  D)
  Respiration done clear
  View Solution play_arrow

• question_answer59)
  The bond formed between the first phosphate group and adenosine in ATP is                                           [KCET 2001]
  A)
  Phosphoester bond                            done clear
  B)
  Adenophosphate bond done clear
  C)
  Nitrophosphate bond                         done clear
  D)
  Phosphoanhydride bond done clear
  View Solution play_arrow

• question_answer60)
  The three natural processes that form the basis for evolution are    
  A)
  Fossils, natural selection and adaptation done clear
  B)
  Mutation, genetic variation and adaptation done clear
  C)
  Adaptation, natural selection and inheritance done clear
  D)
  Predation, genetic variation and natural selection done clear
  View Solution play_arrow

• question_answer61)
  Changes in the body form of some planktonic animals with seasonal changes in temperature are grouped under
  A)
  Anamorphosis                                     done clear
  B)
  Cyclomorphosis done clear
  C)
  Metamorphosis                                    done clear
  D)
  Heteromorphosis done clear
  View Solution play_arrow

• question_answer62)
  When spontaneous process occurs then free energy of a system                                    [DPMT 2003]
  A)
  Decreases done clear
  B)
  Increases done clear
  C)
  Remains same done clear
  D)
  Either can decreases or increase done clear
  View Solution play_arrow

• question_answer63)
  Which of the following statement its incorrect                                      [AMU 2003]
  A)
  Life processes are consequences of reactions that in an organims done clear
  B)
  Living organisms are made of inorganic and organic compounds done clear
  C)
  Life comes form pre-existing life done clear
  D)
  Genes are not responsible for the stability or change ability of species done clear
  View Solution play_arrow

• question_answer64)
  Viroids have                                                                                            [AIEEE Pharmacy 2004; MHCET 2001]
  A)
  Double stranded RNA encolsed by protein coat done clear
  B)
  Double stranded DNA encolsed by protein coat done clear
  C)
  Single stranded DNA not encolsed by protein coat done clear
  D)
  Single stranded RNA not encolosed by protein coat done clear
  View Solution play_arrow

• question_answer65)
  Which of the following is not true for viruses
  A)
  They are made up of nucleic acids and proteins done clear
  B)
  They multiply in host cells done clear
  C)
  They can be grown in sugary solution done clear
  D)
  They are obligate parasites done clear
  View Solution play_arrow

• question_answer66)
  To show host specificity is a
  A)
  Living character of virus done clear
  B)
  Non-living character of virus done clear
  C)
  Intermediate between (a) and (b) done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer67)
  The virus of deoxyvira (sub-phylum) contains
  A)
  mRNA       done clear
  B)
  tRNA done clear
  C)
  DNA   done clear
  D)
  rRNA done clear
  View Solution play_arrow

• question_answer68)
  'Viroids' differ from 'viruses' in being [BHU 1994]
  A)
  Naked RNA molecules only done clear
  B)
  Naked DNA molecules only done clear
  C)
  Naked DNA packaged with viral genome done clear
  D)
  Satellite RNA packaged with viral genome done clear
  View Solution play_arrow

• question_answer69)
  Which one of the following statements is correct                                 [MP PMT 1996]
  A)
  Viruses are obligate parasites done clear
  B)
  All fungi are pathogenic done clear
  C)
  All algae are eucaryotic done clear
  D)
  Bacteria are always harmful to mankind done clear
  View Solution play_arrow

• question_answer70)
  A substance (low molecular weight protein) produced by host cells in response to viral infection and protect other cells against further viral infection is [AIIMS 1982; MP PMT 1989]
  A)
  Phytotoxin done clear
  B)
  Antibody done clear
  C)
  Interferon  done clear
  D)
  Hormone done clear
  View Solution play_arrow

• question_answer71)
  In phage (plaque) culture                                                                       [CMC Vellore 1993]
  A)
  Only protein of virus enters and multiplies done clear
  B)
  Only DNA of virus enters the bacterium and multiplies done clear
  C)
  Whole virus enters the bacterium and multiplies done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer72)
  In lysogenic state viral DNA
  A)
  Undergoes disintegration done clear
  B)
  Remains persistant and attached to bacterial DNA done clear
  C)
  Both co-exist separately in the same cell done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer73)
  Aphid Acyrthosiphon transmit which of the following causal agent
  A)
  Pea mosaic done clear
  B)
  TMV done clear
  C)
  Yellow vein mosaic of Bhindi done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer74)
  Which of the following diseases are known to becaused by viruses? (In this item one or more of the answers given may be correct. Decide which are correct and mark the answer sheet according to the code) Burkitt's lymphoma Adult T?cell leukemia Phenyl ketonuria Code                                                                                                                             [MP PMT 1993]
  A)
  1, 2 and 3 are correct done clear
  B)
  Only 1 and 2 are correct done clear
  C)
  Only 2 and 3 are correct done clear
  D)
  Only 1 and 3 are correct done clear
  View Solution play_arrow

• question_answer75)
  A single stranded  DNA molecule is the genetic material of bacteriophage    [BHU 1992, 95, 2000, DPMT 2003, 2004]
  A)
  T2        done clear
  B)
  T4        done clear
  C)
  × 174        done clear
  D)
  l done clear
  View Solution play_arrow

• question_answer76)
  The genome of transducing phages is      [JIPMER 2001]
  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_answer77)
  The most thoroughly studied of the known bacteria plant interactions is the                                                [CBSE PMT 2004]
  A)
  Nodulation of Sebania stems by nitrogen fixing bacteria done clear
  B)
  Plant growth stimulation by phosphate-solubilisig bacteria done clear
  C)
  Cyanobacterial symbiosis with some aquatic ferms                            done clear
  D)
  Gall formation on certain angiopserms by Agrobacterium done clear
  View Solution play_arrow

• question_answer78)
  Flagella of prokaryotic and eukaryotic cells differ in [CBSE PMT 2004]
  A)
  Microtubular organization and type of movement done clear
  B)
  Microtubular organization and function done clear
  C)
  Type of movement and placement in cell done clear
  D)
  Location in cell and mode of unctioning done clear
  View Solution play_arrow

• question_answer79)
  Which of the following statements is not true for retroviruses [CBSE PMT 2004]
  A)
  The gentic material in mature retroviruses in RNA done clear
  B)
  Retroviruses are causative agents or certain kinds of cancer in man done clear
  C)
  DNA is not present at any stage in the life cycle of retroviruses done clear
  D)
  Retroviruses carry gene for RNA-dependent DNA polymerase done clear
  View Solution play_arrow

• question_answer80)
  "Eternity of life'' means
  A)
  Infinite life done clear
  B)
  Mortal life done clear
  C)
  Immortal life                                         done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer81)
  An evolutionary explanation of the origin of plants and animals was given by
  A)
  Lucretius   done clear
  B)
  John Ray done clear
  C)
  Erasmus Darwin                                  done clear
  D)
  Carl Linnaeus done clear
  View Solution play_arrow

• question_answer82)
  Which were dominant during mesozoic era                                        [CPMT 1984]
  A)
  Pisces done clear
  B)
  Ruling reptiles done clear
  C)
  Birds  done clear
  D)
  Ruling mammals done clear
  View Solution play_arrow

• question_answer83)
  The first mammals arose                                                                        [CPMT 1986, 93]
  A)
  After the extinction of dinosaurs done clear
  B)
  Before the origin of dinosaurs done clear
  C)
  Along with the dinosaurs done clear
  D)
  From the dinosaurs done clear
  View Solution play_arrow

• question_answer84)
  In a bush pattern of evolution, the uppermost tips of the branches represent
  A)
  Early prosimians                                  done clear
  B)
  Lower taxonomic rank done clear
  C)
  Descendent lines                                 done clear
  D)
  Currently living species done clear
  View Solution play_arrow

• question_answer85)
  A species that contains two or more sub-species are called
  A)
  Sibling species                                     done clear
  B)
  Sub-species pool done clear
  C)
  Polytypic species                                 done clear
  D)
  Biological races done clear
  View Solution play_arrow

• question_answer86)
  Animals living in colder region have shorter tail and ears as compared to the animals living in warmer regions. This phenomenon is called                                                                      [CBSE PMT 1996]
  A)
  Bergman's law                                     done clear
  B)
  Glober's law done clear
  C)
  Allen's law done clear
  D)
  Jordan's law done clear
  View Solution play_arrow

• question_answer87)
  Present day mammals have their predecessor in                                [Pune CET 1998]
  A)
  Therapsids                                           done clear
  B)
  Diapsids done clear
  C)
  Synapsids done clear
  D)
  Anapsids done clear
  View Solution play_arrow

• question_answer88)
  In the developmental history of mammalian heart, it is observed that it passes through a two?chambered fish?like heart, three?chambered frog?like heart and finally four?chambered stage. To which hypothesis can this above cited statement be approximated                                         [CBSE PMT 1998]
  A)
  Biogenetic law                                     done clear
  B)
  Hardy Weinberg law done clear
  C)
  Lamarck's principle                             done clear
  D)
  Mendelian principle done clear
  View Solution play_arrow

• question_answer89)
  Some of the important evidences of organic evolution are [CPMT 1982]
  A)
  Occurrence of homologous and vestigial organs done clear
  B)
  Occurrene of analogous and vestigial organs done clear
  C)
  Occurrence of homologous and analogous organs done clear
  D)
  Occurrence of analogous organs only done clear
  View Solution play_arrow

• question_answer90)
  Evolution is regarded as
  A)
  Theory       done clear
  B)
  Established fact done clear
  C)
  Principle    done clear
  D)
  Hypothesis done clear
  View Solution play_arrow

• question_answer91)
  Fossil contents  of the alimentary canal are termed as
  A)
  Casts  done clear
  B)
  Corprolites done clear
  C)
  Impressions                                          done clear
  D)
  Trails done clear
  View Solution play_arrow

• question_answer92)
  Master plate in replica plating experiment contained the
  A)
  Drug resistant bacteria done clear
  B)
  Sterile colony of bacteria done clear
  C)
  Different colonies of fertile bacteria done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer93)
  Which of the following was expert in making tools, weapons, paintings etc.                                 [CPMT 1984; BHU 2005] or Who drew excellent pictures of animals in caves, made tools, carved ornaments from ivory stone arrows etc. [MP PMT 1994]
  A)
  Java ape man                                      done clear
  B)
  Peking man done clear
  C)
  Cro-Magnon man                                done clear
  D)
  Rhodesian man done clear
  View Solution play_arrow

• question_answer94)
  Simian shelf is a characteristic of apes, which connects the [CPMT 1980]
  A)
  Limbs with girdle done clear
  B)
  Brain done clear
  C)
  Posterior part of the mandibles done clear
  D)
  Anterior part of the mandibles done clear
  View Solution play_arrow

• question_answer95)
  Which one of the following statements is correct regarding evolution of mankind                                       [CBSE PMT 1997]
  A)
  Neanderthal man and Cro-Magnon man were living at the same time done clear
  B)
  Australopithecus was living in Australia done clear
  C)
  Homo erectus is preceded by Homo habilis done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer96)
  The term 'Fisheries' refers to                                                                  [St. Johns MC 2002]
  A)
  Marine fish resources                          done clear
  B)
  Fresh water fish resource done clear
  C)
  Both marine and freshwater fish resource done clear
  D)
  All the animal resources from aquatic environment done clear
  View Solution play_arrow

• question_answer97)
  Which of the following subdivisions deals with fossils                       [Orissa JEE 1990, 95 KCET 1990, 94; CBSE PMT 1991; JKCMEE 2002]
  A)
  Ecology     done clear
  B)
  Ornithology done clear
  C)
  Ethology    done clear
  D)
  Palaeontology done clear
  View Solution play_arrow

• question_answer98)
  In which of them, induced breeding is effective                                   [MP PMT 1995]
  A)
  Sericulture done clear
  B)
  Apiculture done clear
  C)
  Lac culture done clear
  D)
  Pisciculture done clear
  View Solution play_arrow

• question_answer99)
  The theory of "continental drift" was originally proposed by [AMU 1997]
  A)
  Alfred Bailey                                        done clear
  B)
  Charles Darwin done clear
  C)
  Alfred Wegener                                    done clear
  D)
  Robert I. Bowman done clear
  View Solution play_arrow

• question_answer100)
  The hypothesis that all photosynthetic organisms require a source of hydrogen was first proposed by    [Kerala PMT 2000]
  A)
  Van Niel    done clear
  B)
  Hatch and Slack done clear
  C)
  Robin Hill done clear
  D)
  Ruber and Kamen done clear
  View Solution play_arrow

• question_answer101)
  The environment of an organism includes                                         
  A)
  Atmosphere and biosphere done clear
  B)
  Hydrosphere and lithosphere done clear
  C)
  Atmoshpere and hydrosphere done clear
  D)
  Atmosphere, hydrosphere, lithosphere and biosphere done clear
  View Solution play_arrow

• question_answer102)
  All the energy for living organisms comes as radiation in the form of......from the sun and is captured by.......        
  A)
  Neutrons, electrons                             done clear
  B)
  Photons, Protons done clear
  C)
  Electrons, photons                              done clear
  D)
  Photons, electrons done clear
  View Solution play_arrow

• question_answer103)
  Which of the following adaptations help in evolution                       
  A)
  Long term and heritable                     done clear
  B)
  Short term and heritable done clear
  C)
  Long term and nonheritable done clear
  D)
  Short term and nonheritable done clear
  View Solution play_arrow

• question_answer104)
  Which of the following is the most suitable fertilizer for paddy fields                                              [MH CET 2002]
  A)
  Rhizobium done clear
  B)
  Mycorrhizae done clear
  C)
  Axotobacter and Clostridium done clear
  D)
  Symbiotic or non-symbiotic cyanobacteria done clear
  View Solution play_arrow

• question_answer105)
  KFD virus is a
  A)
  Single host virus                                  done clear
  B)
  Dual host virus done clear
  C)
  Plant virus done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer106)
  Due to viral infection in green tissues of plants, there is alteration in the normal development of chlorophyll. This is called
  A)
  Chlorosis   done clear
  B)
  Necrosis done clear
  C)
  Yellowing  done clear
  D)
  Mosaic done clear
  View Solution play_arrow

• question_answer107)
  Bacteriophage transfers DNA from donor to recipient cell, this is called                                        [BVP 2000]
  A)
  Translation                                           done clear
  B)
  Transduction done clear
  C)
  Conjugation                                         done clear
  D)
  Transcription done clear
  View Solution play_arrow

• question_answer108)
  The cells of bacterium Stanphylococcus remain arranged in the form of                                       [BVP 2002]
  A)
  Plate   done clear
  B)
  Cube done clear
  C)
  Irregular     done clear
  D)
  Chain done clear
  View Solution play_arrow

• question_answer109)
  Cyanobacteria are                                                            [BVP 2004]
  A)
  Mosses which attack bacteria done clear
  B)
  Bacteria which attack Cyanophyceae done clear
  C)
  Autotrophic organism with phycocyanin done clear
  D)
  None of these done clear
  View Solution play_arrow