General Science Biology Questions

General Science Biology Questions

1. Which of the following is a ‘club moss’ ?
(A) Selaginella
(B) Equisetum
(C) Lycopodium
(D) None of these
Ans : (C)

2. Raphe in Marsilea is present in—
(A) Female gametophyte
(B) Sporocarp
(C) Sporophyte
(D) Male gametophyte
Ans : (B)

3. The stele type occurring in Marsilea is—
(A) Solenostele
(B) Protostele
(C) Amphiphloic Siphonostele
(D) All of these
Ans : (C)

4. The morphological nature of rhizophore of Selaginella is—
(A) Root like
(B) Stem like
(C) Both root and stem like
(D) Rhizoid like
Ans : (C)

5. The Selaginella shows—
(A) Large and small leaves arranged spirally
(B) All leaves large
(C) All leaves small
(D) All of these
Ans : (A)


6. The anatomy of Pinus needle reflects the features of a—
(A) Mesophyte
(B) Xerophyte
(C) Hydrophyte
(D) Epiphyte
Ans : (B)

7. Girdling leaf traces are the characteristic feature of the stem of—
(A) Cycas
(B) Pinus
(C) Ephedra
(D) Gnetum
Ans : (A)

8. Pinus is a—
(A) Tree
(B) Shrub
(C) Herb
(D) None of these
Ans : (A)

9. The recent era is—
(A) Cenozoic
(B) Mesozoic
(C) Proterozoic
(D) Archeozoic
Ans : (A)

10. Fossils are found in—
(A) Igneous rocks
(B) Quartz
(C) Soil
(D) Sedimentary rocks
Ans : (D)

11. Reserve food material in fungi is—
(A) Glycogen
(B) Starch
(C) Sucrose
(D) Maltose
Ans : (A)

12. Which is rootless fern ?
(A) Pteris
(B) Dryopteris
(C) Salvinia
(D) Adiantum
Ans : (C)

13. Which is common between aerobic respiration and anaerobic respiration ?
(A) Similar substrate
(B) Glycolysis
(C) Pyruvic acid
(D) All of these
Ans : (B)

14. Turpentine oil is obtained from—
(A) Coal
(B) Petroleum
(C) Cedarwood
(D) Pinus
Ans : (D)

15. Which alga was used by Calvin and his co-workers in their experiments of photosynthesis ?
(A) Chlamydomonas
(B) Chlorella
(C) Chara
(D) Volvox
Ans : (B)

16. Which is an oilseed crop ?
(A) Marigold
(B) Chrysanthemum
(C) Rose
(D) Sunflower
Ans : (D)

17. The first transgenic plant used for commercial production was—
(A) Cotton
(B) Tomato
(C) Tobacco
(D) Rice
Ans : (B)

18. Rare hybrid plants can be saved by—
(A) Pollen culture
(B) Embryo culture
(C) Protoplast culture
(D) None of these
Ans : (C)

19. Which is not a category ?
(A) Ecotype
(B) Species
(C) Genus
(D) Order
Ans : (A)

20. Linnaeus published his concept of binomial nomenclature first in—
(A) Systema Naturae
(B) Species Plantarum
(C) Genera Plantarum
(D) Philosophia Botanica
Ans : (B)

21. When chlorophyll is burnt which element is obtained ?
(A) Ca
(B) Na
(C) Mg
(D) Mn
Ans : (C)

22. Iron deficiency results in—
(A) Leaf tip necrosis
(B) Small leaves disease
(C) Decreased protein synthesis
(D) Intervenal chlorosis appearing first in young leaves
Ans : (D)

23. A phytohormone is—
(A) Naturally produced
(B) Synthetic substance
(C) Both (A) and (B)
(D) None of these
Ans : (A)

24. During the seismonastic movement in Mimosa pudica turgor changes occur in—
(A) Leaflets
(B) Stipules
(C) Pulvinus leaf base
(D) Petiole and stem
Ans : (C)

25. Evergeen trees remain green through the year on account of—
(A) Cold climate
(B) Absence of leaf fall
(C) Leaves falling in small number interval
(D) Supply of moisture throughout year
Ans : (C)

26. Phenotypic ratio of dihybrid test cross is—
(A) 15 : 1
(B) 3 : 1
(C) 9 : 3 : 3 : 1
(D) 1 : 1 : 1 : 1
Ans : (C)

27. The damaged ozone layer is situated in—
(A) Ionosphere
(B) Mesosphere
(C) Stratosphere
(D) Troposphere
Ans : (C)

28. Which one of the following is ordinarily not an air pollutant ?
(A) CO2
(B) CO
(C) SO2
(D) Hydrocarbon
Ans : (A)

29. Genes are made by—
(A) Histones
(B) Lipoproteins
(C) Hydrocarbons
(D) Polynucleotides
Ans : (D)

30. The term ‘ecosystem’ was proposed by—
(A) Odum
(B) Tansley
(C) Whitker
(D) Goli
Ans : (B)

31. The first juvenile larva of Ascaris is known as—
(A) Filiform larva
(B) Rhabditiform larva
(C) Miracidium larva
(D) Microfilariae
Ans : (B)

32. Chromosomes contain—
(A) Protein only
(B) DNA and protein
(C) DNA, RNA and histone
(D) DNA, RNA, histone and non-histone proteins
Ans : (B)

33. Which are phagocytes in liver ?
(A) Kupffer cells
(B) Aciner cells
(C) Diter cells
(D) Hensen's cells
Ans : (A)

34. Termites digest wood with the help of an enzyme secreted by the—
(A) Salivary glands
(B) Cells in the midgut
(C) Symbiotic protozoa
(D) Bacteria and fungi outside the body
Ans : (C)

35. In honeybee colony the drones are produced by—
(A) Fertilized eggs
(B) Unfertilized eggs
(C) Larvae fed upon leaves
(D) Fasting larvae
Ans : (B)

36. Jacobson's organ is concerned with—
(A) Smell
(B) Burrowing
(C) Touch
(D) Vision
Ans : (A)

37. Body organisation in Hydra is of—
(A) Tissue grade
(B) Organ grade
(C) Cellular grade
(D) Organ system grade
Ans : (A)

38. Leech obtains continuous blood flow from its victim by pouring in it—
(A) Heparin
(B) Hirudin
(C) Insulin
(D) Pepsin
Ans : (B)

39. Spicules of Sponges are formed by—
(A) Procytes
(B) Pinacocytes
(C) Scleroblasts
(D) Thesocytes
Ans : (B)

40. Heterocoelous centrum is a characteristics of—
(A) Amphibia
(B) Reptilia
(C) Birds
(D) Mammalia
Ans : (C)

41. The exclusively sedentary protochordate animals are found in the class—
(A) Pterobranchia
(B) Larvacea
(C) Ascidiacea
(D) Thaliacea
Ans : (A)

42. Cytopyge is found in—
(A) Paramecium
(B) Entamoeba
(C) Amoeba
(D) Trypanosoma
Ans : (A)

43. Littoral form of animals is found—
(A) In fresh water
(B) In sea water near the shore
(C) In deep sea
(D) At the bottom of the sea
Ans : (D)

44. Bladder worm is a larva of—
(A) Obelia
(B) Silkmoth
(C) Taenia
(D) Nereis
Ans : (C)

45. Which of the following secretions associated with digestion does not have enzymes ?
(A) Bile
(B) Gastric juice
(C) Saliva
(D) Pancreatic juice
Ans : (A)

46. Yellow fever is transmitted by—
(A) Female Culex
(B) Female Anopheles
(C) Female Aedes
(D) Housefly
Ans : (C)

47. The covering membrane of the vacuole is known as—
(A) Tonoplast
(B) Cell wall
(C) Plasma layer
(D) None of these
Ans : (A)

48. Age of fishes was known as—
(A) Devonian
(B) Ordovician
(C) Crustaceous
(D) Silurian
Ans : (A)

49. ‘Quartan malaria’ is caused by—
(A) Plasmodium vivax
(B) Plasmodium malariae
(C) Plasmodium ovale
(D) Plasmodium falciparum
Ans : (B)

50. The word ‘species’ was coined by—
(A) John Ray
(B) Mayer
(C) J. Huxley
(D) C. Linnaeus
Ans : (A)

51. An embryo of chick with 7 pairs of somites is—
(A) 20 hours old
(B) 22 hours old
(C) 24 hours old
(D) 18 hours old
Ans : (C)

52. In the mammals, cleavage result formation of solid mass of cells known—
(A) Blastula
(B) Gastrula
(C) Morula
(D) Neurula
Ans : (C)

53. F1particles are found in—
(A) Lysosome
(B) Mitochondria
(C) Golgi Body
(D) Endoplasmic reticulum
Ans : (B)

54. The name ‘polytene chromosome’ suggested by—
(A) E.G. Balbiani
(B) Kollar
(C) Heitz
(D) Bauer
Ans : (A)

55. Centriole is found in—
(A) Animal cells
(B) Red algae
(C) Prokaryotes
(D) Flowering plants
Ans : (A)

56. The first phylum of animal kingdom exhibiting bilateral symmetry is—
(A) Arthropoda
(B) Annelida
(C) Mollusca
(D) Platyhelminthes
Ans : (D)

57. The fresh water sponge is—
(A) Spongella
(B) Grantia
(C) Euplectella
(D) Euspongia
Ans : (A)

58. Flame cells are related with—
(A) Excretory system
(B) Digestive system
(C) Circulatory system
(D) Respiratory system
Ans : (A)

59. The intermediate host in the life cycle of F. hepatica (Liver fluke) is—
(A) Sheep
(B) Snail
(C) Man
(D) Bird
Ans : (B)

60. Vitelline membrane is found in—
(A) Birds
(B) Tunicates
(C) Fishes
(D) Mammals
Ans : (A)

61. Two-pigment system theory of photosynthesis was proposed by—
(A) Hill Emerson
(B) Emerson
(C) Blackmann
(D) Hatch and Slack
Ans : (B)

62. Photosynthetic pigments in chloroplast are embedded in membrane of—
(A) Thylakoids
(B) Photoglobin
(C) Matrix
(D) Envelope of chloroplast
Ans : (A)

63. The rate of photosynthesis is maximum in—
(A) Green light
(B) Blue light
(C) Red light
(D) White light
Ans : (C)

64. All energy is trapped in pigment system-1 in—
(A) ATP
(B) Carbohydrate
(C) NADH2
(D) P-700
Ans : (D)

65. How many ATP molecules are produced, as a net gain, during the complete breakdown of glucose ?
(A) 36
(B) 28
(C) 12
(D) 18
Ans : (A)

66. Father of taxonomy is—
(A) De Candolle
(B) Hooker
(C) Linnaeus
(D) Aristotle
Ans : (C)

67. For entry in gene pool, a mutation occur in—
(A) Somatic cells
(B) Germ cells
(C) Plasma proteins
(D) Somatic DNA
Ans : (B)

68. Vessels diffier from tracheids—
(A) In being living
(B) In being derived from a single cell
(C) In having vertical row of cells and their cross wall dissolved
(D) Because they conduct water
Ans : (C)

69. Which one is true nut ?
(A) Walnut
(B) Cashewnut
(C) Groundnut
(D) Coconut
Ans : (B)

70. After transcription, the mRNA molecule—
(A) Disintegrates
(B) Moves into cytoplasm
(C) Replicates itself
(D) Reassociates to form its structure
Ans : (B)

71. Fossilization is also known by the—
(A) Acclimatzation
(B) Pasteurization
(C) Preservation
(D) Tyndallization
Ans : (C)

72. The branch that deals with the plants studies in the geological past is called—
(A) Pteridology
(B) Palaeobotany
(C) Neurology
(D) Archaeology
Ans : (B)

73. Birbal Sahni Institute of Palaeobotany is situated at—
(A) Allahabad
(B) Delhi
(C) Mumbai
(D) Lucknow
Ans : (D)

74. In plants, largest egg is found in—
(A) Cycas
(B) Sequoia
(C) Pinus
(D) Selaginella
Ans : (A)

75. Which one of the following is an example of symbiosis ?
(A) Utricularia
(B) Agaricus
(C) Lichen
(D) Mango
Ans : (C)

76. Which of the following pteridophytes is known as ‘Horse-tail’ ?
(A) Rhynia
(B) Selaginella
(C) Equisetum
(D) None of these
Ans : (C)

77. Marsilea is a—
(A) Homosporic pteridophyte
(B) Heterosporic pteridophyte
(C) Non-sporic pteridophyte
(D) Seeded pteridophyte
Ans : (B)

78. A plant bearing two types of spores is termed as—
(A) Heterospory
(B) Seed habit
(C) Homospory
(D) All of these
Ans : (A)

79. In Pinus present only—
(A) Male cone
(B) Female cone
(C) Male and female cones
(D) All of these
Ans : (D)

80. Number of cotyledons found in the embryo of Cycas is—
(A) 4
(B) 2
(C) 3
(D) 1
Ans : (B)

81. Bryophytes are—
(A) Aquatic
(B) Terrestrial
(C) Amphibious
(D) None of these
Ans : (C)

82. Sporophyte is dependent on gametophyte in—
(A) Algae
(B) Pteridophyta
(C) Fungi
(D) Bryophyta
Ans : (D)

83. In gametophytic phase of Bryophyta the last cell is—
(A) Gamete
(B) Spore
(C) Elater
(D) Zygote
Ans : (A)

84. In Funaria, the calyptra is formed by—
(A) Antheridium
(B) Columella
(C) Capsule
(D) Archegonium
Ans : (D)

85. A bryophyte differes from pteridophyte in—
(A) Archegonia
(B) Lack of vascular tissue
(C) Independent gametophyte
(D) None of these
Ans : (B)

86. Acid rain is mainly a mixture of—
(A) Sulphuric acid and nitric acid
(B) Hexane and methane
(C) Acetic acid and bromine
(D) Ascorbic acid and citric acid
Ans : (A)

87. Ribosomes are sites for—
(A) Protein synthesis
(B) Photosynthesis
(C) Fat synthesis
(D) Respiration
Ans : (A)

88. Pyramid of energy is—
(A) Alwayss inverted
(B) Always upright
(C) Sometimes inverted and sometimes upright
(D) None of these
Ans : (B)

89. ATP is—
(A) An enzyme which brings about oxidation
(B) A hormone
(C) A molecule with high energy phosphate bond
(D) A protein
Ans : (C)

90. Which one of the following is not a feature of prokaryotic cell ?
(A) Absence of nuclear membrane and the nucleus
(B) Absence of cell organelles
(C) Absence of genetic material
(D) Absence of histone protein in the chromosome
Ans : (C)

91. Which one of the following is highly dangerous radioactive pollutant ?
(A) Phosphorus-32
(B) Sulphur-35
(C) Strontium-90
(D) Calcium-40
Ans : (C)

92. The indicator of SO2 pollution of air is—
(A) Lichen
(B) Fern
(C) Black mould
(D) Moss
Ans : (A)

93. The founder of cell theory was—
(A) Wolf
(B) Rudolf Virchow
(C) Myen, Von Moll and Raspail
(D) Schleiden and Schwann
Ans : (D)

94. Fats in our body are formed when—
(A) There is little glycogen in the body
(B) Blood sugar level becomes constant
(C) Glycogen storage in liver and muscles is completed
(D) Intake of protein is high
Ans : (C)

95. Liver performs several functions. One of these functions is—
(A) Histolysis
(B) Digestion of proteins
(C) Glycogenesis
(D) Maintaining salt balance
Ans : (C)

96. Poison fangs of snakes are—
(A) Maxillary teeth
(B) Specialized structures
(C) Premaxillary teeth
(D) Vomerine teeth
Ans : (A)

97. Wings of butterfly, bird and bat are—
(A) Homologous organs
(B) Analogous organs
(C) Unrelated organs
(D) Vestigeal organs
Ans : (B)

98. ‘Ozone Day’ is observed on—
(A) January, 30
(B) April, 21
(C) September, 16
(D) December, 5
Ans : (C)

99. Which one of the following is the link between Annelida and Mollusca ?
(A) Archaeopteryx
(B) Peripatus
(C) Neopilina
(D) Coelacanth
Ans : (C)

100. The heartbeat is regulated by—
(A) Pacemaker
(B) Vagus nerve
(C) Sympathetic nerve
(D) All of these
Ans : (D)

101. Which pair is correct ?
(A) Microlecithal eggs — Dipnoi
(B) Homolecithal eggs — Amphibia
(C) Mesolecithal eggs — Bird
(D) Centrolecithal eggs — Insect
Ans : (D)

102. The hypothesis of ‘Coupling and Repulsion’ for linkage was formulated by—
(A) Sutton and Boveri
(B) Bateson & Punnet
(C) T.H. Morgan
(D) W. Sutton
Ans : (B)

103. Balanoglossus is commonly known as—
(A) Earthworm
(B) Tapeworm
(C) Corn worm
(D) Tongue worm
Ans : (D)

104. In Drosophila, sex determination depends on—
(A) Y-chromosome
(B) X-chromosome
(C) Autosome
(D) X-chromosome & autosome both
Ans : (D)

105. Nonsense codons are—
(A) AUG, AAU, UAG
(B) GGU, AGU, AUG
(C) UAG, UAA, UGA
(D) GAU, AAU, GUA
Ans : (C)

106. In which stage does centromere divide in two ?
(A) Metaphase-I
(B) Prophase-I
(C) Metaphase-II
(D) Anaphase-II
Ans : (D)

107. Which animal is egg laying mammal ?
(A) Didelphys
(B) Macropus
(C) Pteropus
(D) Tachyglossus
Ans : (D)

108. An oil producing gland on the tail of bird is known as—
(A) Preen gland
(B) Mucus gland
(C) Green gland
(D) Sebaceous gland
Ans : (A)

109. A snake that is viviparous is—
(A) The Russell’s pitless viper
(B) The pit viper
(C) Rattle snake
(D) Kraits
Ans : (B)

110. A gland which is found on undersurface of the thighs of male lizard ?
(A) Sudorific gland
(B) Femoral gland
(C) Green gland
(D) Stink gland
Ans : (B)

111. Which of the following is not a path flagellate ?
(A) Leishmania
(B) Giardia
(C) Trypanosoma
(D) Noctiluca
Ans : (D)

112. The Glochidium larva of Unio—
(A) Is free swimming
(B) Is ectoparasite on fish
(C) Is endoparasite on fish
(D) Lives in bottom
Ans : (B)

113. The term ‘Plasmalemma’ was given by—
(A) C. Nageli & C. Cramer
(B) J.Q. Plowe
(C) Dancilli & Davson
(D) Robertson
Ans : (B)

114. Smooth endoplasmic reticulum performs—
1. Synthesis of lipids
2. Glycogenolysis
3. Sterol metabolism
4. Detoxification
Codes :
(A) Only 4 is correct
(B) 1 and 2 both are correct
(C) 2 and 3 both are correct
(D) All are correct
Ans : (D)

115. The innermost layer of egg albumen in birds is called—
(A) Inner thin albumen
(B) Vitelline membrane
(C) Dense alburmen
(D) Chalaziferous layer
Ans : (B)

116. In which one of the following is the anus absent ?
(A) Leech
(B) Roundworm
(C) Earthworm
(D) Flatworm
Ans : (D)

117. Which type of jaw suspension is found in mammals ?
(A) Autostylic
(B) Holostylic
(C) Craniostylic
(D) Hyostylic
Ans : (A)

118. Synthesis of urea in liver takes place by—
(A) Nitrogen cycle
(B) Krebs’ cycle
(C) Glycolysis
(D) Ornithine cycle
Ans : (D)

119. Sexual dimorphism is found in—
(A) Hydra
(B) Earthworm
(C) Ascaris
(D) Fasciola
Ans : (B)

120. Which of the following animals has a nervous system but no brain ?
(A) Amoeba
(B) Hydra
(C) Cockroach
(D) Earthworm
Ans : (B)

121. Aristotle’s Lantern occurs in—
(A) Asteroidea
(B) Echinoidea
(C) Holothuroidea
(D) Crinoidea
Ans : (B)

122. Neoteny is observed in—
(A) Ambystoma
(B) Alytes
(C) Sycon
(D) Sacculina
Ans : (A)

123. Kidneys are vital organs of the body because they help in—
(A) Regulation of body fluids
(B) Regulation of acid-base balance
(C) Removal of metabolic wastes
(D) All of these functions
Ans : (D)

124. The infective stage of malarial parasite is—
(A) Trophozoite
(B) Merozoite
(C) Sporozoite
(D) Cyst
Ans : (C)

125. Parasitic castration occurs in—
(A) Fasciola
(B) Nereis
(C) Sacculina
(D) Palaemon
Ans : (C)

1. Stem is modified into cladode :
(A) Casuarina
(B) Asparagus
(C) Opuntia
(D) Euphorbia

2. Verticillaster type of inflorescence is found in :
(A) Cotton
(B) Datura
(C) Lilium
(D) Ocimum

3. A simple one seeded fruit in which pericarp is fused with seed coat is :
(A) Achene
(B) Caryopsis
(C) Cypsela
(D) Nut

4. The portion of DNA which contains information for an entire polypeptide is called :
(A) Cistron
(B) Muton
(C) Recon
(D) Operon

5. Bicarpellary, syncarpous ovary with axile placentation is seen in :
(A) Solanaceae
(B) Caesalpinaceae
(C) Asteraceae
(D) Malvaceae

6. Alburnum is also called :
(A) Autumn wood
(B) Heart wood
(C) Sap wood
(D) Spring wood

7. The entry of pollen tube into the ovule through micropyle is called :
(A) Porogamy
(B) Mesogamy
(C) Anisogamy
(D) Chalazogamy

8. Type of pollination in Commelina is :
(A) Chasmogamy
(B) Geitonogamy
(C) Xenogamy
(D) Cleistogamy

9. The process of embryo formation without fertilization is known as :
(A) Apospory
(B) Apogamy
(C) Parthenocarpy
(D) Polyembryony

10. Which of the process Cholodny-Went theory is concerned with ?
(A) Photomorphogenesis
(B) Photoperiodism
(C) Phototropism
(D) Photorespiration

11. The hormone present in the liquid endosperm of coconut is :
(A) Cytokinin
(B) Gibberellin
(C) Ethylene
(D) Auxin

12. The phytohormone which influences apical dominance growth is :
(A) IAA
(B) ABA
(C) GA3
(D) C2H4

13. An example of short day plant is :
(A) Wheat
(B) Maize
(C) Chrysanthemum
(D) Radish

14. The ovary after fertilization is converted into :
(A) Embryo
(B) Endosperm
(C) Fruit
(D) Seed

15. The molecular formula of Chlorophyll ‘a’ is :
(A) C55H72O5N4Mg
(B) C55H70O5N4Mg
(C) C55H72O6N4Mg
(D) C50H72O5N4Mg

16. The first compound that accepts CO2 during dark phase is :
(A) NADP
(B) Ferrodoxin
(C) RUBP
(D) Cytochrome

17. Initiation codon for methionine is :
(A) AAA
(B) UUU
(C) UAA
(D) AUG

18. The deficiency of this micronutrient results in little leaf disease :
(A) Copper
(B) Zinc
(C) Boron
(D) Iron

19. Kranz anatomy is a morphological diversity in the leaves of :
(A) C3-plants
(B) C4-plants
(C) C3 and C4-plants
(D) CAM plants

20. Prechilling treatment to break seed dormancy is :
(A) Scarification
(B) Stratification
(C) Impaction
(D) Vernalization

21. The pyruvic acid formed during glycolysis is oxidized to CO2 and H2O in a cycle called :
(A) Calvin cycle
(B) Nitrogen cycle
(C) Hill reaction
(D) Krebs cycle

22. Respiratory quotient (RQ) is one in case of :
(A) Fatty acids
(B) Nucleic acids
(C) Carbohydrates
(D) Organic acids

23. An example of free living nitrogen fixing aerobic bacteria is :
(A) Clostridium
(B) Rhizobium
(C) Azotobacter
(D) Rhodospirillum

24. Identify the plant belonging to the Reed-Swamp stage in hydrarch succession :
(A) Juncus
(B) Sagittaria
(C) Salix
(D) Trapa

25. A gas produced by paddy fields and connected with global warming is :
(A) CO2
(B) Chlorine
(C) H2S
(D) Methane

26. If the strong partner is benefited and the weak partner is damaged, it is known as :
(A) Predation
(B) Allelopathy
(C) Symbiosis
(D) Commensalism

27. Acid rain is mainly caused due to increase in the levels of the gas(es) :
(A) SO2 only
(B) CO2 only
(C) SO2, CO2
(D) NO2 and SO2

28. The flow of energy among various trophic levels of an ecosystem is :
(A) Unidirectional
(B) Bidirectional
(C) Multidirectional
(D) Circular

29. Increase in atmospheric temperature due to CO2 is called :
(A) Pasteur effect
(B) Green-house effect
(C) Blackman effect
(D) Emerson effect

30. The protective-ozone layer is present in :
(A) Ionosphere
(B) Stratosphere
(C) Troposphere
(D) Lithosphere

31. Decomposition of organic matter is brought about by :
(A) Protozoa
(B) Plants
(C) Micro-organisms
(D) None of these

32. The smallest taxon is called :
(A) Class
(B) Order
(C) Genus
(D) Species

33. Which one of the following is the first National Park in India ?
(A) Kanha National Park
(B) Periyar National Park
(C) Corbett National Park
(D) Bandipur National Park

34. Which one of the following is having ssRNA ?
(A) TMV
(B) T2-bacteriophage
(C) Polio Virus
(D) CMV

35. In Whittaker’s system of classification, prokaryotes are placed in the kingdom :
(A) Protista
(B) Monera
(C) Plantae
(D) Animalia

36. Virus consists of :
(A) Nucleic acid and protein
(B) Nucleic acid
(C) Orotein
(D) None of these

37. This substance is present in the cell walls of Gram Positive bacteria only :
(A) Peptidoglycan
(B) Lipopolysaccharides
(C) Teichoic acids
(D) None of these

38. Highest degree of polymorphism is found in :
(A) Protozoa
(B) Cnidaria
(C) Platyhelminthes
(D) Arthropoda

39. Sea mouse belongs to phylum :
(A) Mollusca
(B) Cnidaria
(C) Arthropoda
(D) Annelida

40. One of the following animal belongs to Cyclostomata :
(A) Channa
(B) Loris
(C) Dodo
(D) Petromyzon

41. An egg laying mammal is :
(A) Delphinus
(B) Macaca
(C) Ornithorhynchus
(D) Macropus

42. In sharks, one of the following is absent :
(A) Claspers
(B) Placoid scales
(C) Cartilaginous endoskeleton
(D) Air bladder

43. The devil fish and sea hare are :
(A) Molluscs
(B) Crustaceans
(C) Coelenterates
(D) Marine fish and mammal

44. Endothelium of blood vessels is made up of :
(A) Simple cuboidal epithelium
(B) Simple squamous epithelium
(C) Simple columnar epithelium
(D) Simple non-ciliated columnar

45. In humans, sphincter of Oddi is associated with the opening of :
(A) Common hepatopancreatic duct
(B) Pyloric stomach
(C) Oesophagus
(D) Colon

46. In human beings, the duration of cardiac cycle is :
(A) 0•08 second
(B) 0•5 second
(C) 0•8 second
(D) 8•0 second

47. In which part of nephron, reabsorption is minimum from filtrate ?
(A) Henle’s loop
(B) Proximal convoluted tubule
(C) Distal convoluted tubule
(D) Collecting duct

48. Which hormone level reaches peak during luteal phase of menstrual cycle ?
(A) Luteinizing hormone
(B) Progesterone
(C) Follicle stimulating hormone
(D) Estrogen

49. The largest subunit of prokaryotic ribosomes is :
(A) 30S
(B) 40S
(C) 50S
(D) 60S

50. Which of the following is a part of endomembrane system of eukaryotic cell ?
(A) Peroxisomes
(B) Chloroplasts
(C) Mitochondria
(D) Golgi complexes

51. Inflammation of joints due to accumulation of uric acid crystals is called as :
(A) Gout
(B) Myasthenia gravis
(C) Osteoporosis
(D) Osteomalacia

52. Chromosomes are visible with chromatids at this phase of mitosis :
(A) Interphase
(B) Prophase
(C) Metaphase
(D) Anaphase

53. Inheritance of ABO blood grouping is an example of :
(A) Dominance
(B) Codominance
(C) Incomplete dominance
(D) All of these

54. In a dihybrid cross between RRYY and rryy parents, the number of RrYy genotypes in F2 generation will be :
(A) 4
(B) 3
(C) 2
(D) 1

55. Identify a 47, + 21 disorder from the following :
(A) Down’s syndrome
(B) Turner’s syndrome
(C) Phenylketonuria
(D) Klinefelter’s syndrome

56. Uracil is present in RNA at the place of :
(A) Adenine
(B) Guanine
(C) Cytosine
(D) Thymine

57. Copying genetic information from one strand of DNA into RNA is :
(A) Translation
(B) Transcription
(C) Transformation
(D) Transduction

58. S. L. Miller’s closed flask contained :
(A) CH4
(B) H2
(C) NH3 and Water vapour
(D) All of these

59. Change of frequency of alleles in a population results in evolution is proposed in :
(A) Darwin’s theory
(B) Lamarck’s theory
(C) Hardy-Weinberg principle
(D) De Vries theory

60. One of the following is the vestigial organ in human beings :
(A) Nictitating membrane
(B) Spleen
(C) Femur
(D) Tibia

61. The golden age of reptiles is :
(A) Cenozoic era
(B) Palaeozoic era
(C) Mesozoic era
(D) Silurian period

62. The theory of use and disuse of organ was proposed by :
(A) Darwin
(B) Lamarck
(C) De Vries
(D) Hooker

63. One of the following theories were proposed by Weissman :
(A) Law of inheritance
(B) Theory of inheritance of acquired characters
(C) Theory of natural selection
(D) Theory of germplasm

64. Ontogeny recapitulates phylogeny—
this theory is called :
(A) Biogenetic law
(B) Law of embryology
(C) Law of acquired characters
(D) Law of Bridges

65. The brain capacity of Homoerectus is :
(A) 800 cc
(B) 900 cc
(C) 1200 cc
(D) 1400 cc

66. An example of Innate immunity is :
(A) PMNL-neutrophils
(B) T-lymphocytes
(C) B-lymphocytes
(D) TH cells

67. Cocaine is extracted from :
(A) Erythroxylum coca
(B) Cannabis sativa
(C) Papaver somniferum
(D) Atropa belladonna

68. The enzyme that cuts DNA is :
(A) DNA-polymerase
(B) DNA-ligase
(C) DNA-lyase
(D) Restriction endonuclease

69. In the association between two organisms, if one organism is benefited and the other is not benefited, this relationship is known as :
(A) Symbiotism
(B) Mutualism
(C) Commensalism
(D) Parasitism

70. Opiate narcotics drugs are :
(A) Antianxiety
(B) Analgesic
(C) Hypnotic
(D) Antihistamine

71. The drug useful to increase cardiovascular effects in human beings is :
(A) Cocaine
(B) Barbiturate
(C) Benzodiazetine
(D) Insulin

72. In echolocation, the animal that produces high frequency sounds is :
(A) Monkey
(B) Butterfly
(C) Squirrel
(D) Bat

73. Two kingdoms constantly figured in all biological classifications are :
(A) Plantae and Animalia
(B) Monera and Animalia
(C) Protista and Animalia
(D) Protista and Plantae

74. The dioecious animal is :
(A) Liverfluke
(B) Hookworm
(C) Tapeworm
(D) Earthworm

75. Comb plates are found in :
(A) Adamsia
(B) Aurelia
(C) Nereis
(D) Pleurobrachia

Answers with Hints
1. (B) Cladode is a type of phylloclade consisting of one internode only. These are cylindrical (not fleshy) and are mistaken for leaves.
2. (D) Verticillaster is a complex inflorescence found in the Ocimum sanctum, a member of family Labiatae.
3. (B) 4. (A) 5. (A) 6. (C) 7. (A)
8. (D) Cleistogamy is seen in underground flowers of Commelina bengalensis which are small and inconspicuous. This plant also bears chasmogamous blue flowers above.
9. (B) 10. (C) 11. (A) 12. (A)
13. (C) Short day plant (SDP) requires a relatively short day light period (usually 8-10 hrs.) and a continuous dark period of about 14–16 hours for subsequent flowering.
14. (C) 15. (A) 16. (C) 17. (D) 18. (B)
19. (B) Kranz anatomy—It is a typical structure in the leaves of plants that have a C4–pathway of CO2 fixation. The leaves contain a ring of mesophyll cells, containing a few chloroplasts surroundings a sheath of bundle sheath cells having large chloroplasts involved in the Calvin cycle.
20. (B) 21. (D) 22. (C) 23. (C) 24. (B) 25. (D) 26. (A)
27. (D) Acid rain results from the emission into the atmosphere of various pollutant gases in particular sulphur dioxide (SO2) and oxides of nitrogen (NO2), which originate from the burning of fossil fuels and from motor-car exhaust fumes, respectively.
28. (A) 29. (B) 30. (B) 31. (C) 32. (D)
33. (C) The first National Park in India was set up in 1935 in the foot hills of Himalayas and was known as Hailey National Park. It is now known as Corbett National Park.
34. (A) Tobacco mosaic virus (TMV) is a rigid rod-shaped ssRNA-containing virus that causes distortion and blistering of leaves in a wide range of plants.
35. (B) Kingdom Monera includes all prokaryotes. They are basically unicellular but can be mycelial, colonial and filamentous.
36. (A) 37. (A)
38. (B) A striking feature of cnidarians is the high degree of polymorphism often seen in a single species. Two basic types—sessile polyp and free-swimming medusa–occur.
39. (D) 40. (D) 41. (C)
42. (D) Members of Elasmobranchii subclass have no swim (air) bladders.
43. (D) 44. (B) 45. (A) 46. (C) 47. (C) 48. (B) 49. (C)
50. (D) Golgi complex is a part of endomembrane system, which is the system of internal membranes within eukaryotic cells that divide the cell into functional and structural compartments, or organelles.
51. (A) 52. (B)
53. (B) AB blood group in human is an example of codominance in which both the alleles IA IB are equally expressed. It means IA IB individuals have a phenotype that is essentially a combination of those shown by individuals with A and B blood groups.
54. (A)
55. (A) A small autosome, chromosome 21, added to the normal complement (47, + 21) causes Down syndrome. This is a trisomic for chromosome 21.
56. (D) 57. (B) 58. (D) 59. (C) 60. (A)
61. (C) The Mesozoic era is often known as the “Golden Age of Reptiles” as these animals, which included the dinosaurs and ichthyosaurs, became dominant lifeform.
62. (B) 63. (D) 64. (A) 65. (B) 66. (A) 67. (A)
68. (D) Restriction enzyme is a class of nucleases originally extracted from the E . coli. Type I restriction enzymes bind to a recognition site of duplex DNA, travel along the molecule and cleave one strand only. Type II cleaves the duplex at specific target site at or near the binding site.
69. (C) 70. (B) 71. (A) 72. (C) 73. (A) 74. (B) 75. (D)