PPSC Lecturer Botany (BS-17) Past Paper | Original Paper | Old Paper

Punjab Public Service Commission Lecturer Botany BS-17 Past Paper.



1. Plants expressing foreign genes introduced by genetic engineering are:
A.     Transgens
B.      Hybrids
C.      Mutants
D.     Polyploids
E.      None of these    

2. An association of species in which both partners benefits is called:
A.     Antagonism
B.      Competition
C.      Mutualism
D.     None of these

3. Autotrophs are primary producers in:
A.     Food web
B.      Food chain
C.      Food series
D.     Food security
E.      None of these
           
4. A multiprotein complex that comprises ATPase in thylakoid membrane is:
A.     CF0-CF1
B.      CF0-CF2
C.      CF1-CF2
D.     CF2-CF1
E.      None of these
           
5. Set of conditions in which an organism completes its life cycle is:
A.     Niche
B.      Habitat
C.      Biome
D.     Habit
E.      None of these
           
6. Suberized band in the cell wall of endodermis is:
A.     Exodermal strip
B.      Casparian strip
C.      Abscision strip
D.     Hypodermal strip
E.      None of these

7. Genetically dwarfness can be overcome by treatment with:
A.     Jasmonates
B.      Auxins
C.      Abscisic acid
D.     Gibberellins
E.      None of these

8. Exchange of genetic material between two paired chromosome during meiosis is:
A.     Test cross
B.      Back cross
C.      Inbreeding
D.     None of these

9. Free space in tissues comprising cell wall and intercellular spaces:           
A.     Symplast
B.      Apoplast
C.      Protoplast
D.     Amyloplast
E.      None of these    

10. Chromosome compliment with 2n-1 is called:
A.     Disomy
B.      Nullisomy
C.      Monosomy
D.     Tetrasomy
E.      None of these  

11. Plants shedding their leaves seasonally are called:
A.     Annuals
B.      Biannuals
C.      Perennials
D.     Deciduous
E.      None of these

12. Organisms that obtain energy by metabolizing the inorganic sources are:
A.     Lithotrophs
B.      Osmotrophs
C.      Heteroautotrops
D.     Phototrophs
E.      None of these    

13. The culminating stage of plant succession in a given ecosystem is:
A.     Cline
B.      Climate
C.      Climax
D.     Cleave
E.      None of these

14. Climatically and geographically similar conditions on the earth are called:
A.     Biotope
B.      Biomes
C.      Biosphere
D.     Biography
E.      None of these    

15. Vernalization is process in which flowering is promoted by:      
A.     Salt treatment
B.      Hot treatment
C.      Cold treatment
D.     None of these    

16. Which of the following contains its own DNA?
A.     Golgi bodies
B.      Mitochondria
C.      Ribosomes
D.     None of these    

17. In chlorophyll, four rings of pyrrole forming a complex with: 
A.     Cu-atom
B.      Fe-atom
C.      Mg-atom
D.     K-atom
E.      None of these    

18. Plants growing inside another plant are called:
A.     Endophytes
B.      Exophytes
C.      Amphiphytes
D.     Phleophytes
E.      None of these

19. A functional unit of modern ecology is:
A.     Habitat
B.      Biosphere
C.      Succession
D.     None of these

20. Mutation arising as an immediate and direct response to selective pressure:
A.     Point mutation
B.      Adaptive mutation
C.      Shift mutation
D.     Natural selection
E.      None of these

21. The Green Algae belongs to:
A.     Cyanochloranta
B.      Chlorophycophyta
C.      Charophyta
D.     Cryptophycophyta
E.      None of these

22. If the gametes and gametangia in Fungi are of unequal size, they are termed as:
A.     Heterothallic
B.      Homothallic
C.      Isogametes
D.     Anisogametes
E.      None of these

23. Chlorophyll ‘d’ exists in:
A.     Pyrrophyta
B.      Phaeophyta
C.      Cryptophyta
D.     Rhodophyta
E.      None of these

24. Which of the type of chlorophyll is rare in Xanthophyceae and has been determined in only two of its genera:
A.     chlorophyll ‘a’
B.      chlorophyll ‘e’
C.      chlorophyll ‘b’
D.     chlorophyll ‘d’
E.      None of these

25. The Axoneme in an algal filament is composed of ____________ fibrils:
A.     five
B.      seven
C.      eleven
D.     one
E.      None of these

25. An antibiotic called “Chlorellin” is derived from:
A.     Chara
B.      Spirogyra
C.      Volvox
D.     Chlorella
E.      None of these

26. In Pakistan, Volvox is found abundantly in water ponds during the months of:
A.     March and April
B.      May and June
C.      November and December
D.     January and February
E.      None of these

27. Because of extracting ______ from water and depositing it in their walls different species of Chara are referred to as “Stone Worts:
A.     Sodium chloride
B.      Calcium carbonate
C.      Potassium sulphate
D.     Potassium nitrate
E.      None of these

28. Puccinia graminis causes _______ in wheat:
A.     Yellow or stripe rust
B.      Brown or orange leaf rust
C.      Black or stem rust
D.     Loose green smut
E.      None of these

29. The zero and one stages of Puccinia graminis are produced on:
A.     Triticum aestivum
B.      Hordeum Vulgare          
C.      Sorghum Vulgare
D.     Barberis Vulgaris
E.      None of these

30. A stable self-supporting association of a _______ is termed as lichen:
A.     bryophyte & a pteridophyte
B.      mycobiont & a phycobiont
C.      plant & animal
D.     gymnosperm & angiosperm
E.      None of these

31. Equisetum is the only living genus that belongs to:
A.     Sphenopsida
B.      Caphalida
C.      Chlorophycophyta
D.     Pteropsida
E.      None of these

32. The genus Equisetum comprises about 25 species distributed world-over except in:
Eurasia
A.     North America
B.      South America
C.      Australasia
D.     None of these

33. The members of class Filicinae in pteridophyta date back to _______ era:
A.     Mesozoic
B.      Paleozoic
C.      Cenozoic
D.     Cambrian
E.      None of these

34. Marsilea quadrifolia belongs to the group of plants known as:
A.     Lichens
B.      Sedges
C.      Ferns
D.     Shrubs
E.      None of these

35. ________ show marked affinities with both Pteridophytes and angiosperms:
A.     Bryophytes
B.      Hydrophytes
C.      Gymnosperms
D.     Epiphytes
E.      None of these

36. _______ has five leaves in the spur:
A.     Pinus longifolia
B.      Pinus excelsa
C.      Pinus roxberghii
D.     Pinus wallichiana
E.      None of these

37. The resting period between pollination and fertilization in Taxas baccata may be:
A.     Five to ten months
B.      Two to three months
C.      One to two months
D.     Ten to eleven months

38. In Ephedra, the oosphore undergoes repeated divisions to produce eight-celled:
A.     Zygote
B.      Zygosphore
C.      Endosperm
D.     Pro-embryo
E.      None of these

39. Double fertilization is a characteristic of:
A.     Gymnosperms
B.      Bryophytes
C.      Angiosperms
D.     Pteridophytes
E.      None of these

40. NADH from the Krebs cycle is approximately equal to:
A.     2 ATP
B.      3 ATP
C.      4 ATP
D.     6 ATP
E.      None of these

41. In mitochondrial electron transport chains, the final c acceptor is:
A.     H2O
B.      H2O2
C.      NAD+
D.     FAD
E.      None of these

42. The movement of water from cell to cell via plasmadesmata is called:
A.     Symplastic
B.      Transmembrane
C.      Apoplastic
D.     Facilitated
E.      None of these

43. In maize plant, the CO2 fixation mechanism is called:
A.     C3 pathway
B.      C4 pathway
C.      CAM pathway
D.     C3 – C4 intermediate
E.      None of these

44. Salt-loving plants are known as:
A.     Glycophytes
B.      Halophytes
C.      Xerophytes
D.     Mesophytes
E.      None of these

45. With the addition of solution to a liquid system, the water potential of the system:
A.     Increases
B.      Decreases
C.      Remains stable
D.     Remains variable
E.      None of these

46. The conversion of pyruvate into acetyl C0. A is called:
A.     Glycolysis
B.      Fermentation
C.      Oxidative carboxylation
D.     B-Oxidation
E.      None of these

47. Between adenine and thymine, there are:
A.     Two hydrogen bonds
B.      3 hydrogen bonds
C.      One hydrogen bond
D.     4 hydrogen bonds
E.      None of these

48. The stage of meiosis in which pairing of homologous chromosomes starts is called:
A.     Leptotene
B.      Zygotene
C.      Diplotene
D.     Pachytene
E.      None of these

49. The site of chromosome on which a gene is located is called:
A.     Allele
B.      Locus
C.      Site
D.     Trait
E.      None of these

50. In a dihybrid cross, the ratio of F2 generation is:
A.     9:3:3:1
B.      3:1
C.      1:2:1
D.     1:1
E.      None of these

51. When a single gene has multiple effects, the phenomenon is called:
A.     Codominance
B.      Epistasis
C.      Pleiotropy
D.     Genostasis
E.      None of these

52. Lamarck’s theory of evolution was published in:
A.     1807
B.      1808
C.      1809
D.     1810
E.      None of these

53. The book “Origin of Species” was written by:
A.     Linnaeus
B.      Lamarck
C.      Mendel  
D.     Darwin
E.      None of these

54. The interaction between algae and fungi to form lichen is called:
A.     Parasitism
B.      Mutalism
C.      Commensalism
D.     Amensalism
E.      None of these

55. The actual location or place where an organism lives is called:
A.     Habitat
B.      Ecosystem
C.      Niche
D.     Biome
E.      None of these

56. Which of the biomes has been increased in area by human activities?
A.     Savanna
B.      Grassland
C.      Desert
D.     Coniferous forest
E.      None of these

57. Which zone of the lake ecosystem consists of phyto-and zoo-planktons?
A.     Littoral zone
B.      Limnetic zone
C.      Profundal zone
D.     Water deep layers
E.      None of these

58. Which of the following is a biotic component of an ecosystem?
A.     Producers
B.      Consumers
C.      Decomposers
D.     All of these
E.      None of these

59. A sequence of changes in the community structure of an ecosystem over a period of time is called: (a) Natural selection
A.     Succession
B.      Neo-Darwinism
C.      Lamarckism
D.     None of these

Answers:
41.3ATP
42.h2o
43.symplast
44.c4pathway
45.halophytes
46.remain stable
47.none(oxidative decarboxylation)
48.two hydrogen bond
49.zygotene
50.locus
51.9:3:3:1
52.pleiotrophy
53.1909
54.darwin
55.mutualism
56.habitat
57.grassland
58.all of these
59.succession

60.NADH from the Krebs cycle is approximately equal to:
A.     2 ATP
B.      3 ATP
C.      4 ATP
D.     6 ATP
E.      None of these

61. In mitochondrial electron transport chains, the final c acceptor is:
A.     H2O
B.      H2O2
C.      NAD+
D.     FAD
E.      None of these

62. The movement of water from cell to cell via plasmadesmata is called:
A.     Symplastic
B.      Transmembrane
C.      Apoplastic
D.     Facilitated
E.      None of these

64. In maize plant, the CO2 fixation mechanism is called:
A.     C3 pathway
B.      C4 pathway
C.      CAM pathway
D.     C3 – C4 intermediate
E.      None of these

65. Salt-loving plants are known as:
A.     Glycophytes
B.      Halophytes
C.      Xerophytes
D.     Mesophytes
E.      None of these

66. With the addition of solution to a liquid system, the water potential of the system:
A.     Increases
B.      Decreases
C.      Remains stable
D.     Remains variable
E.      None of these

67. The conversion of pyruvate into acetyl C0. A is called:
A.     Glycolysis
B.      Fermentation
C.      Oxidative carboxylation
D.     B-Oxidation
E.      None of these

68. Between adenine and thymine, there are:
A.     Two hydrogen bonds
B.      3 hydrogen bonds
C.      One hydrogen bond
D.     4 hydrogen bonds
E.      None of these

69. The stage of meiosis in which pairing of homologous chromosomes starts is called:
A.     Leptotene
B.      Zygotene
C.      Diplotene
D.     Pachytene
E.      None of these

70. The site of chromosome on which a gene is located is called:
A.     Allele
B.      Locus
C.      Site
D.     Trait
E.      None of these

71. In a dihybrid cross, the ratio of F2 generation is:
A.     9:3:3:1
B.      3:1
C.      1:2:1
D.     1:1
E.      None of these

72. When a single gene has multiple effects, the phenomenon is called:
A.     Codominance
B.      Epistasis
C.      Pleiotropy
D.     Genostasis
E.      None of these

73. Lamarck’s theory of evolution was published in:
A.     1807
B.      1808
C.      1809
D.     1810
E.      None of these

74. The book “Origin of Species” was written by:
A.     Linnaeus
B.      Lamarck
C.      Mendel  
D.     Darwin
E.      None of these

75. The interaction between algae and fungi to form lichen is called:
A.     Parasitism
B.      Mutalism
C.      Commensalism
D.     Amensalism
E.      None of these

76. The actual location or place where an organism lives is called:
A.     Habitat
B.      Ecosystem
C.      Niche
D.     Biome
E.      None of these

77. Which of the biomes has been increased in area by human activities?
A.     Savanna
B.      Grassland
C.      Desert
D.     Coniferous forest
E.      None of these

78. Which zone of the lake ecosystem consists of phyto-and zoo-planktons?
A.     Littoral zone
B.      Limnetic zone
C.      Profundal zone
D.     Water deep layers
E.      None of these

79. Which of the following is a biotic component of an ecosystem?
A.     Producers
B.      Consumers
C.      Decomposers
D.     All of these
E.      None of these

80. A sequence of changes in the community structure of an ecosystem over a period of time is called: (a) Natural selection
A.     Succession
B.      Neo-Darwinism
C.      Lamarckism
D.     None of these
E.      Botany Past Paper
  
81. Pappus found in compositae is the modification of:
A.     Calyx
B.      Bract
C.      Corolla
D.     Stamen
E.      None of these

82. In Malvaceae androecium is characteristically:
A.     Monadelphous
B.      Didynamous
C.      Diadelphous
D.     Tetradynamous  
E.      None of these

83. The first phylogenetic system of plant classification was proposed by:
A.     Engler
B.      Prantl
C.      Wettstien
D.     Eichler
E.      None of these

84. The androcium in Compositae is:
A.     Epitetalous and manodelphous
B.      Polyandrous and manodelphous
C.      Polyandrous and syngenesious
D.     Epitetalous and syngenesious
E.      None of these

85. The fruit of mango is:
A.     Berry
B.      Drupe
C.      Pome
D.     Nut
E.      None of these

86. Fungal spores produced asexually at tip or side of hyphae are called:
A.     Sporangiophore
B.      Anthrospores
C.      Conidia
D.     Spores
E.      None of these

87. Damping off disease is caused by:
A.     Aspergillus
B.      Ustilago
C.      Pythium
D.     Puccinia
E.      None of these

88. Obliquely placed ovary is present in the family:
A.     Rutaceae
B.      Solanaceae
C.      Malvaceae
D.     Labiatae
E.      None of these

89. Gynobasic style arises from the base of ovary. This is characteristics of the family:
A.     Labiatae
B.      Solanaceae
C.      Compositae
D.     Malvaceae
E.      None of these

90. Columella is present in sporangium of:
A.     Spirogyra
B.      Yeast
C.      Ulothrix
D.     Rhizopus

91. Which of the following diseases is cause by fungus?
A.     Cholera
B.      Rust of wheat
C.      T.B
D.     Tetanus

92. Target board effect is caused by:
A.     Alternaria
B.      Colletotrichum
C.      Pyricularia
D.     Helminthosporium

93. Edible fungus is:
A.     Aspergillus
B.      Agaricus
C.      Penicillium
D.     None of these

94. Clamp connections are very common in:
A.     Ascomycetes
B.      Basidiomycetes
C.      Phycomycetes
D.     None of these

95. Penicillin was extracted by:
A.     Flemming
B.      Huxley
C.      Lamarck
D.     Brown

96. Bacteria belong to:
A.     Schizomycetes
B.      Actinomycetes
C.      Epigynous
D.     None of these

97. Mushroom is a:
A.     Parasite
B.      Saprophyte
C.      Photosynthetic
D.     None of these

98. The sieve elements are the major components of:
A.     Xylem
B.      Phloem
C.      Cambuim
D.     None of these

99. The gametes taking part in sexual reproduction of rhizopus are:
A.     Uninucleate
B.      Binucleate
C.      Multinucleate
D.     DIkaryotic
E.      None of these

100. Blue green algae is a common name of:
A.     Xanthophyceate
B.      Chlorophyceae
C.      Cyanophycemae
D.     Charophyceae
E.      None of these


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