INTER SCIENCE COLLEGE, HAZARIBAG

BIOLOGY XII Full Marks: 100

Time: 2 Hours1. Spermatogenesis is promoted by

() Oestrogen (b) Progesterone2. Which cells in the testis secrete testosterone, the male sex hormone

(a) Interstitial cells or cells of Leydig (c)Sertoli cells

3. From acrosome which secrets

() Hyaluronic acid

4. Inhibition of secretion of which of the following hormone is necessary for disintegration of

corpus luteum

(a)LH5. Corpus luteum is the source of secretion of

(a) Oestrogen 6. Ifafter ovulation no pregnancy results, the corpus luteum

(a) Is maintained by presence of progesterone (c)Become active and secretes lot of FSH and LH () Produces lot of oxytocin and relaxin

7. Cessation of menstrual cycle in the human female is known as

(a) Ovulation 8. In the 28 day human ovarian cycle, the ovulation takes place typically on

() Day 1 of the cycle

(c)Day 14 of the cycle 9. Ovulation in the human female normally takes place during the menstrual cycle

(a) At the beginning of the proliferative phase (c)At the mid secretory phase

10.The number of foetal membranes in man is

(c) Testosterone (d) Oxytocin

(b) Cells of the germinal epithelium

(d) Secondary spermatocytes

(c) TSH (d) Firtilizin (b) Hyaluronidase

(b) Progesterone (c)LTH (d)FSH

(b) Progesterone (c) Oestradiole (d) LH

(b) Degenerates in a short time

(6) Puberty (c) Menopause (d) maturation

(6) Day 5 of the cycle

(d) Day 28 of the cycle

(b) At the end of the proliferative phase(d) Just before the end of the secretory phase

)3 () 4 (d) 0 (a)2 11. The shock absorber fluid of the developing embryo is known as

(a) Chorionic luid 12. Placenta is the region, where

(a)Foetus is supplied by maternal blood (b)Embryo is attached to mother by umbilical cord (c)Foetus recelves maternal blood and nutrition

13. Ubisch bodies are present in )Pollen tube

14. How many meiotic division are necessary to produce 100 pollen grains?

(b) Amniotic fluid (c) Allantoic fluid (d) Tail region

(d)Embryo is enclosed by membranes

(b) Pollen grain (c) Microspore (d) Tapetum

100 (b) 25 c) 50 (a) 20 15. Female gametophyte of angiosperm is generally

(a) 7 celled and 7 nucleate(c)7 celled and 8 nucleate

16. Which of the following pairs of plant parts are both haploid ? (a) Antipodal cells and egg cells (C)Nucellus and antipodal cells

17. When pollen grains of a flower pollinate the stigma of another flower of the same plant, it is called

(b) 8 celled and 8 nucleate (d) 8 celled and 7 nucleate

(b) Nucellus and primary endosperm nucleus

(d) Antipodal cells and megaspore mother cells

(a) Dichogamy 18. Double fertilization is a characteristie of

(a) Gymnosperms19. Fusion product of polar nuclei and male gamete is

(a) Triple fusion 20.1f the number of chromosomes in endosperm or a dicot plant malze grain is 36,the root cells will

(b) Herkogamy (c) Geitonogamy (d) Autogamy

(b) Bryopbytes (c) Angiosperms (d) Pteridophytes(b) Primary endosperm nucleus (c) Zygote (d) Secondary nueleus

contain

()72 chromosomes (b) 28 chromosomes (c) 24 chromosomesd) 48 chromosomes

(d) Boveri 21. Term 'genetics' was given by

(a) Mendel 22. Which one of the following represents a test erOSS

(a) W wx WW

23. Semiconsevative replication of DNA was first demonstrated in

(a) Drosophila melanogaster(b) Streptococcus pneumoniae

24. The synthesis of DNA always

(a) Is 3'to 5 25. Who among the following did not provide experimental proof for the semiconservative model

of DNA replication ?

(a) Meselson & Stahl

26. A mutation which substitutes one purine base with another purine base is called?

(a) Transversion

27.The central dognma of protein synthesis in teminious is

(a)g RNA+ DNA> mRNA>protein (c)DNA DNA m RNA protein

28. Number of the autosomes in a normal female is

(a) 21 29.Genotype of a Down's syndromeis

a)45+ XX 30. A colour blind man marries the daughter of a colour blind person. Then in their progeny

(a) None of their daughters are colour blind

(b) All the daughters are colour blind 31.RNA polymerase is involved in

(a) Translation 32. The source of Taq polymerase used in PCR is a

(a) Thermophilic fungus (c)Thermophilic bacterium

33. The cause of Cat-cry syndrome is due to (a)Loss of a segment of X- chromosome (c)Loss of a segment ofY chromosome

34. Golden rice is a promising transgenic crop. When released for cultivation,it will help in (a) Herbicide tolerance c)Alleviation of vitamin A deficiency

35.The term ecology was coined by (a) Linnaeus

36. An association between two individuals or populations where both the benefitted and where neither can survive without the other is (a) Commensalism

37.Ozone hole meanss

(c) Bateson(b) Morgen

(d) W Wx WW (d) wwx wW

(b) Wwx Ww (c) Wwx ww

(b) Escherichla coli

(d) Salmonella yphimurium

(d)Varies in prokaryotes (b) is 5° to 3' (c) Varies in Eukaryotes

(c) Watson & crick (d) Taylor b) Cairns

(c) Transition () Transfection (b) Transduction

(b) DNA-GRINA-mRNAprotein

(d) mRNA-g RNA DNA protein

) 22 (c) 23 (d) 44

b) 44 + XY (c) 44+ XXY (d) 22+XKY

(b) All the sons are colour blind

(d) Half of their sons are colour blind

(b) Transcription (c) Translocation ()Replication

(b) Mesophilic fungus (d) Halophilic bacterium

b) Loss of a segment of sh chorosome (d) none of the above

(b) Producing a petrol-like fuel from rice (d) Pest resistance

(b) WIlllam (c) Odumn (a)Haeckel

(b) Amensalism (c) Proto- cooperation (d) Mutualism

(a) Hole is the stratosphere(c)Decrease in concentration

38.Which of the following is nota blotie component ' (a)Phytoplankton

39. Pyramid of energy in a pond ecosystem is always (a) Invertedd

40. Energy low and energy transformations in living systems strictly conform to the (a) Law of limiting factors

(b) Law oI thermodynamics(e) Biogenetic law

(b) Same concentration of ozone (d) Increase in the concentration

(b) Herbivores (e) Light (d) Bacteria

(b) Upright (c) Irregular (d) Linear

(b) Liebig's law of minimum (d) Shelford's law of tolerance

41.In food chain initial organisms are

()Top consumers (c) Primary consumers

42. The bacteria that attack dead organie matter are

(a) Producer43. Which is the correct sequence in the food chain In a grassiand ?

(a) Grass wolf-deer wolf (b) Grass insectbirds snakes

44. The word "ecosystem" was first coined by

(aWeaver and Clements b)A.G. Tansley (e) E.P. Odum 45.If all decomposers are removed from an ecosystem, what will happen ?

(a)All consumers will die

(b) Balance of biogeochemical cycle will be disturbed 46. The transfer of energy from organisms to organisms on a natural community establishes

(a) Food chains

47.Tip of ecological pyramid is occupied by (a) Herbivores

48. Which one of the following is not a gaseous biogeochemical cycle in ecosystem? (a)sulphur cyele

49. DDT residues are rapidly passed through food chain causing biomagnifications because DDT is (a)Lipo soluble

(c) Non toxic to aquatic animals50. Which of the following is not a greenhouse gas?

a) N,O 51. Eutrophication results in the reduction of

(a) Dissolved hydrogen 52. Which of the following plant is used for the purification of water?

(a) Biggiata 53.Secondary sewage treatment is mainly a

(a) Biological process(C)Mechanical process

54. Ozone day' is observed on (a) January 30

55. Improved Indian variety of wheat, carrying genes of dwarfness and higber percentage of

protein and lysine is (a) Lerma safed

S6. South-east Asia is thought to be the centre of origin of (a)Rice, sugarcane, mango and banana (c)Rice and sugarcane

57.The process of mating of individuals, which are more closely related than the average of the

population to which they belong, is called (a) Inbreeding (b) Hybridization

58. Emasculation is a part of (a) Clonal selection

59.A plant cell has potential to develop into full plant. This property of the plant cell is called (Tissue culture

60. What is a clone?

b) Secondary consumers (d)Photosynthasis

b) Herbivore (c) Carnivores (d) Decomposers

(b) Bacterla grass-rabbitsnakes (d) Grass Snake> insect deer

(d) By all of these

(b) Energy cycle will be affected (d) Only herbivores will die

(b) Biologlcal control ()Natural barriers (dhall of these

(b) Carnivores (c) producers (d) Decomposers

(b) Phosphorus cyele (C)Nitrogen cycle (d) Carbon cycle

(b) Moderately toxic (a) Water soluble

(b) CFC (c) Os (d) sO

(b) Dissolved oxygen (c) Mineral salts (d) none of these

(b) Chlorella () Spirogyra d) Eichhornia

(b) Physical process(d) Chemical process

(b) April 21 (e) September 16 (d) December 25

(b) Kalyan (c) Sharbati sonara (d) Sonalika

(b) Rice, sugarcane and mango (d) none of these

(c)Heterosis () Self breeding

(b) Mass selection (c) Hybridization (d) pure line selection

(b) Totipotency (c) Pleuripotenty (d) Gene cloning

(a) A heterozygote produced by sexual means (b)A heterozygote produced by asexual means

61. The Triticum aestivum wheat is

(b) A homozygote produced by asexual means (d) A homozygote produced by sexual means

a)Haploid ( 7 chromosome)

(c)Tetraploid (30 chromosome)(b) Diploid (14 chromosome)(d) Hexaploid (42 chromosome)

62. Which one of the following is commonly used in transfer of foreign DNA into crop plants?

(a)Trichoderma harzianum () Agrobacterium tumefaciens

63. Cellular totipotency was first demonstrated by

(a) F.C. Steward64. Bt toxin is obtained from

(b) Meloidogyne incognita (d) Penicillium expansum

(b) Robert Hooke (c) T. Schwann (d) A. V. Leeuwenhoek

(b) Eukaryotes (e)Both (a) and (b) (d) none of these (a) Prokaryotes

65. "Molecular scissors" used in genetic engineering is

(a) Helicase

66. In protoplast fusion which chemical is used

(a) DMSO 67.Somaclones are obtained by

(a) Tissue culture

68.A change in the chromosome number is called.(a) Chromosomal mutation(C)Somatic mutation

69. FHeterosis means

(b) DNA ligase (c) DNA polymerase (d)Restriction endonuclease

(b) Liquid N (c) Pectinase (d) PEG

(b) plant breeding () Irradiation (d) Genetic engineering

(b) Gene mutation

(d) Polyploidy

(a) Hybrid vigour (c)Eybrid are weak as well as vigorous

70. Gene mutation is

(b) Hybrid are weak (d) Hybrid are neither weak nor vigorous

(a)Due to breeding) Due to change in nitrogenous base sequence (d) Due to change in sequence of genes present in DNA

71. Cross between unrelated group of organisms is called ()Hybrid

72. Credit for bringing green revolution to India goes to (a)B.P. Pal

73. Transgenic plants are

(a) Plants having no gene (b) Plants in which gene are present in an opposite or transposition(c) Plants in which gene have no function to perform(d) Plants in which genes of another organism have been implanted

74.Callus is (a) Undifferentiated mass of tissue (C)Plant hormones

75. Conservation of organisms in natural habitat is called(a) Ex situ conservation (b) Both (a) and (b)

76. Core zone, butter zone and manipulation zone are found in (a) National park

77.Which of the following disease is caused by virus in man? (a) Tetanus

78. Which of the following is a palr of viral diseases? (a) Ringworm, AIDS (c)Typhoid, Tuberculosis

79. Congenital diseases are those which (a) Occur during life time

(c)Are present from time of birth 80. Hereditary ciseases condition in which the blood fails to coagulate

(a) Sickle cell anaemia

(c)Haemophilia

(b) Due to linkage

(6) Test cross (c) Back cross () Heterosis

(b) Norman Borlaug (c)M.S. Swaminathan (d) K. C. Mehta

(b) Root formation in culture media (d) Plant byproduct

(b) In situ consservation(c) none of these

(b) Sanctuary (c) Tiger reserve (d) Biosphere reserve

(b) Dysentery ()Typhold (d) none of these (b) Common Cold, ADS (d) Dysentery , Common Cold

(b) Are deficiency diseases(d) Are spread from man to man

b) Leukemia (d) Alkaptonuria

81. Cancer is related to

(a)Uncontrolled growth of tissues(c)Controlled division of tissues

82. Wncn one of the following is not a property of cancerous cells whereas the remaining three are

(a)They compete with normal cells for vital nutrients bThey do not remain confined in the area of formation

( They divide in an uncontrolled manner) They show contact inhibition

83.Tobacco smoke contains carbon monoxide whlch

(a)Reduces the oxygen-carrylng capacity of blood

(c)Raises blood pressure84. Carcinogenic agent is

(a) X-ray radiation 85.Cyclosporine A an immunosuppressive drug is produced by

(a) Aspergillus niger(b) Penicillium notatum

86. Hallucinogens (a) Are nerve depressants

(C)Alter thoughts, feelings and perceptions (d) Are pain relivers

87.First antibiotic isolated was

(b) Non-malignant tumor

(d) None of these

(b) Causes gastric ulcers

(d) Is carcinogenic

(b) U.V. radiation (c) Nicotine (d) All of these

(b) Manascus purpureus

(d) Mono acetyl morphine

(b) Are nerve stimulants

(a) Terramycin 88. Yeast is used in the production of

(a) Ethyl alcohol

89. Interferons are

(bNeomycin (c) Penicillin (d) Streptomycin

b) Acetie acid (e) Cheese (d) Curd

)Antiviral proteins. (c)Anti-bacterial proteins

90. Which one of the following is used in the baking of the bread?

(a) Rhizopus stolonifer (C)Saccharomyces cerevisiae

91.Spirullina is a microbe that has been found to be a rich source of

(a) Carbohydrate b) protein92.Symbiotic association of fungi with the roofs of higher plants is known as

(a) Lichena

93. High value of BOD (Biochemical Oxygen Demand) Shows

(a)Water is normal

(b) Water is less polluted 94. The capacity to generate a whole plant from any cell is called;

(a) Somaclones

95. Brown rust of wheat ,Red not of sugarcane and late blight of potato are caused by

(a) Bacteria

96. Who among the following discovered the enzyme restriction endo nuclease

(a) H.O. Smith

97.Which of following is a genetic vector

(a) Plasmid

98. Reverse transcriptase is also called

(a) RNA dependent DNA polymerase

(c) DNA dependent DNA polymerase

99. Natural genetic engineer is

(a)Agrobacterium Sp (b) Rhizoblum Sp

Which is the following is used in paddy fields as bio-fertilizers

(b) Complex proteins (d) Anti- cancer proteins

(b) Zygosaccharomyces (d) Saccharamycodes ludwigiü

(c) Fats (d)Vitamins

b) Moss (c)Anabaena (d)Mycorrhiza

b) Water is highly polluted (d) Water is pure

(b) Explant (c) Totipotency ()Micropropagation

b) Fungi Virus () Protozoa

(bF. Jacob (c)A.L. Wolf (d) G.Hounfield

(b) phage (c)cosmid (d)all of these

(b) DNA dependent RNA polymerase

(d) RNA dependent RNA polymerase

(c) Bacilhes (d) Bacteria phase Sp

100. (b) Cyanobacteria (c) Fungi (d) Weeds

(a) Bacteria