INTER SCIENCE GOLLEGE,HAZARIBAG BIOLOGY XII Full Marks: 100

Time: 2 Hours

1. Spermatogenesis is promoted by (a) Ocstrogen (b) Progesterone

2. Which cells in the testis secrete testosterone, the male sex hormone

Interstitial cells or cells of Leydig(c)Sertoli cells

3. From acrosome which secrets (a) Hyaluronie acid

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

corpus lutcum

LH 5. Corpus luteum is the source of seeretion of

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

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

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

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

(a) Day 1 of the cycle Day 14 of the cyclee

9. Ovnlatiòn 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 foctal membranes in man is

2 11.The shock absorber fluid of the developing embryo is known as

(a) Chorionic fluid

12. Placenta is the region, where

(a) Foetus is supplied by maternal blood Embryo is attached to mother by umbilical cord

(c)Foetus receives maternal blood and nutrition (d)Embryo is enclosed by membranes

13.Ubisch bodies are present in

(a) Pollen tube

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

(a) 100

15. Female gametophyte of angiosperm is generally

(a) 7 celled and 7 nucleate

7 celled and 8 nucleate

16. Which of the following pairs of plant parts are both haploid ?

Antipodal cells and egg cells

(c)Nucellus and antipodal cells

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

called

Testosterone (d) Oxytocin

(b) Cells of the germinal epithelium (d) Secondary spermatocytes

Hyaluronidase (c) TSH (d) Firtilizin

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

Progesterone (c) Oestradiole (d) LH

Degenerates in a short time

(b) Puberty Menopause (d) maturation

(b) Day 5 of the eycle (d) Day 28 of the cycle

At the end of the proliferative phase

(d) Just before the end of the secretory phase

(b) 3 (c) 4 (d) 0

Amniotice Muid (c) Allantoic fluid (d) Tail region

(b) Pollen grain (c) Microspore Tapetum

25 (c) 50 (d) 20

(b) 8 celled and 8 nucleate

(d) 8 celled and 7 nucleate

(b) Nucllus and primary endosperm nucleus

(d) Antipodal cells and megaspore mother cells

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

(b) Herkogamy Autogamy

Angiosperms (a) Gymnosperms 19. Fusion product of polar nuclei and male gamete is

(a) Triple fusion

20.If the number of chromosomes in endosperm of a dicot plant maize grain is 36,the root cells will

contain

(b) Bryophytes (d) Pteridophytes

Primary endosperm nucleus (c) Zygote (d) Secondary nucleus

(a) 72 chromosomes (b) 28 chromosomes 24 chromosomes (d) 48 chromosomes

41.In food chain initial organisms are (a) Top consumers

(c) Primary consumers

42.The bacteria that attack dead organic matter are

(b) Secondary consumers @Photosynthasis

(b) Herbivore (C) Carnivores-Decomposers (a) Producer

43. Which is the correct sequence in the food chain in a grassland? (a) Grass wolf deer wolf

Grassinsectbirds-snakes 44. The word "ecosystem" was first coined by

(a) Weaver and Clements

45.If all decomposers are removed fom an ecosystem, what will happen?(a) All consumers will die Balance of biogeochemical cycle will-be disturbed ()Only herbivores will die

46. The transfer of energy from organisms to organtsms on a natural community establishes (a) Food chains

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

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

49.DDT residues are rapidly passed through food chain causing biomagnifications because DDT is Lipo soluble(c) Non toxic to aquatic animals

50. Which of the following is not a greenhouse gas? (a) N,O

51. Eutrophication results in the reduction of

(6) Bacteria grass rabbit snakes

(d) Grass snake->insect-deer

A.G. Tansley (c) E.P. Odum (d) By all of these

(b) Energy cycle will be affected

(b) Biological control (c)Natural barriers all of these

Carnivores (c)producers (d) Decomposers

Phosphorus cycle (c)Nitrogen cycle (d) Carbon cycle

(b) Moderately toxic (d) Water soluble

(b) CFC (d) SO

(a) Dissolved hydrogen Dissolved oxygen (C)Mineral salts () none of these 52. Which of the following plant is used for the purificafion of water?

(a) Biggiata53. Secondary sewage treatment is mainly 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 higher percentage of

protein and lysine is

(a) Lerma safed 56. South-east Asia is thought to be the centre of originof

(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

Inbreeding (b) Hybridization () Heterosis 58. Emasculation is a part of

(a) Clonal selection (b) Mass selection 59.A plant cell has potential to develop into full plant. This property of the plant cell is called

(a) Tissue culture60. What is a clone?

(b) Chlorella Spirogyra Eichhornia

(b) Physical process (d) Chemical process

(6) April 21 September 16 (d) December 25

Kalyan (C) Sharbati sonara Sonalika

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

(d) Self breeding

Hybridization (d) pure line selection

Totipotency () Pleuripotenty (d) Gene cloning

(a) A heterozygote produced by sexual means A homozygote produced by asexual meang b) A heterozygote produced by asexual means (d) A homozygote produced by sexual means

61.The Triticum aestivum wheat is (a) Haploid ( 7 chromosome) (c)Tetraploid (30 chromosome)

(b) Diploid (14 chromosome) Hexaploid (42 chromosome)

S1. Canoer is related to (b) Non -malignant tumor

(d) None of these ncontrolled growth of tissues

(cControlled division of tissuesN2. Which one of the following is not a property of cancerous cells whereas the remaining three are

(aThey compete with normal cells for vital nutrients hey do not remain confined in the area of formation () They divide in an uncontrolled manner They show contact inhibition

Todacco smoke contains carbon monoxide which

(C)Raises (aReduces

bloodthe oxygen-carrying capacity of blood (b) Causes gastric ulcers

Is carcinogenic (c)Raises blood pressure 4. Carcinogenic agent is

(aX-ray radiation &Celosporine A an tmmunosuppressive drug is produced by

(a) Aspergillus niger(b) Penicillium notatum

86. Hallucinogens (a) Are nerve depressantsAlter thoughts, feelings and perceptions (d) Are pain relivers

87.First antibiotic isolated was

None Manascus purpureus Taichodesma

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

The (Fung (d) Mono acetyl morphine

(b) Are nerve stimulants

Penicillin (d) Streptomycin (8) Terramycin 88. Yeast is used in the production of

Ethyl alcohol (b) Acetic acid 89. Interferons are

(b)Neomyein

() Cheese (d) Curd

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

Antiviral proteins(c)Anti-bacterial proteins

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

(a) Rhizopus stolonifer Saccharomyces cerevisiae

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

(a) Carbohydrate 92.Symbiotic association of fungi with the roofs of higher plants is known as

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

(a) Water is normal

(6) 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 Iate blight of potato are caused by-

(a) Bacteria

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

H.O. Smith 97. Which of foltowing is a geneticvector

(a) Plasmid98. Reverse transcriptase is also called

RNA dependent DNA polymerase

(c) DNA dependent DNA polymerase 99. Natural geneticengineer 15.

Agro bacterium Sp (b) Rhizobium Sp

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

(b) Zygosaccharomyces (d) Saccharamycodes ludwigüi

protein (c) Fats (d)Vitamins

b) Moss (c)Anabaena Mycorrhiza

Water is highly polluted(d) Water is pure

Totipotency (d)Micropropagation (b) Explant

Fungi (c) Virus (d) Protozoa

(d) G.Hounfield (b)F. Jacob (C)A.L, Wolf

(c)cosmid all of these (b) phage

(b) DNA dependent RNA polymerase RNA (d) RNA dependent RNA polymerase

(c) Bacilhes (d) Bacteria phase Sp

(c) Fungi (d) Weeds

(a) Bacteria Cyanobacteria

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 F.C. Steward

64. Bt toxin is obtained from

Prokaryotes 65."Molecular scissors" used in genetic engineering is

b) Meloidogyne neognita(d) Penicillium expansum

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

(c) Both (a) and (b) (d) none of these (b) Eukaryotes

(a) Helicase b) DNA ligase ()DNA polymerase ORestriction endonuclease

66. In protoplast fusion which chemical is used

(a) DMSO 67. Somaclones are obtained by

Tissue culture (b) plant breeding68. A change in the chromosome number is called

(a) Chromosomal mütation(c)Somatic mutation

69. Heterosis means

(b) LiquidN (c) Pectinase PEG

) Irradiation(d) Geneticengineering

b) Gene mutation

Polyploidy

Hybrid vigour (C)Hybrid are weak as well as vigorous

70. Gene mutation is

(b) Hybrid are weak (d) Hybrid are neitheweak nor vigorous

(a)Due to breedingDue to change in nitrogenous base sequencepresent 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 performPlants in which genes of another organism have been implanted

74. Callus is

(b) Due to linkage (d) Due to change in sequence of genes

(b) Test cross (c) Back cross (d) Heterosis

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

Undifferentiated mass of tissuec)Plant hormones

75. Conservation of organisma 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) Tetanus78. Which of the following is a pair of viral diseases?

(a) Ringworm, AIDS (c)Typhoid, Tuberculosis

Congenital diseases are those which a) Occur during life time

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

bIn situ consservation (c) none of these

(b) Sanctuary )Tiger reserve Biosphere reserve(b) Dysentery )Typhoid. none of these-

OCommon Cold, AIDS (d) Dysentery, Common Cold

(b) Are deficiency diseasesAre present from time of birth (Are spread from man to man

80. Hereditary diseases condition in which the blood fails to coagulate a)Sickle cell anaemia Haemophilia

(6) Leukemia(d) Alkaptonuria

21. Term 'genetiesyNas given by (a) Mendel Morg Bateso

(d) Boveri

22. Which one of the following represents a test cross ?

(a) Wwx WW (b) Wwx Ww W x 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

(d) W Wx WW (d) w w x ww

Escherichia coli (d) Salmonella typhimurium

is 5 to3 (c) Varies in Eukaryotes (d)Varies in prokaryotes

4.Who among the following did not provide experimental prooffor the semiconservative model

of DNA replication? Meselson & Stahl

26. A mutation which substitutes one purine base with another purine base s ae Transversion-(b) Transduction

27. The central dogma of protein synthesis in teminious is

(a)g RNA-+ DNA> m RNA protein

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

te)Transition (d) Transfection

(b) DNA GRINA- m RNAprotein DNADNA> m RNA protein (d) m RNA-g RNA DNAprotein

28. Number of the autosomes in a normal female is (a) 21

29. Genotype of a Down's syndrome is capu 21ehsomesome-b) 22 (c) 23

(d) 22+ XY 5+X 45+XX (b) 44 + XY 30.A colour blind man marries the daughter of a colour blind person. Then in their progeny

None of their daughters are colour blind (b) All the sons are colour blind All the daughters are colour blind

31.RNA poBymerase is involved in (a) Translation

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

(aj fhermophitie fungus 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 of Y chromosome

34.Golden rice is a promising transgenic crop. When released for cultivation ,it will help in (a) Herbicide tolerance 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

(d) Half of their sons are colour blind

Transcription (c) Translocation (d) Replication (b) Mesophilic fungus (d) Halophilic bacterium

Loss of a segment of 5 chorosome (d) none of the above

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

(b) William (c) Odumn Haeckel

neither can survive without the other is (a) Commensalism

37.Ozone hole means b) Amensalism (c)Proto- cooperation Mutualism

(a) Hole is the stratosphere Decrease in concentration

38. Which of the following is not a biotic component? (a)Phytoplankton 39.Pyramid of energy ioa pond ecosystem is always (a) Inverted 40. Energy flow and energy transformations in living systems strictly conform to the

(a) Law of limiting factors

Law of thermodynamies (e) Biogenetic law

b) Same concentration of ozone (d) Increase in the concentration (b) Herbivores Light (d) BacteriaUpright (c) Irregular (d) Linear

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