MCQ, 2012,

Choose one correct answer for the following questions:1. The first microscope was invented by

Answer: F.janssen and janssen

1. Leeuwenhoek

2. Hooke

3. F.janssen and janssen

4. Schleiden

2. Fuelgen test is specific for

Answer: DNA

1. Proteins 2. RNA 3. Lipids

4. DNA

3. Electrons used in an electron microscope have a wavelength of

Answer: 0.05 A

1. 0.05 A

2. 0.1A

3. 0.15 A

4. 0.5 A

4. X-ray crystallography is useful in the study of

Answer: Three dimensional structures of proteins

1. Lipd structure

2. Three dimensional structure of proteins

3. Arrangement of proteins

4. Composition of nucleic acids and proteins

5. Blue print for building and running cellular machinery is

Answer: DNA

1. RNA

2. DNA 3. mRNA 4. Ribosome

6. Which of the following cannot be grown on artificial culture medium?

Answer: TMV

1. E.coli 2. TMV 3. Aspergillus 4. Yeast 7. Process absent in viruses is

Answer: Energy liberation

1. Replication 2. Mutation 3. Protein synthesis 4. Energy liberation

8. Life originated in

Answer: Water 1. Air 2. Soil 3. Mountains 4. Water

9. Cell theory was put forward by

Answer: Schleiden & Schwann

1. Schleiden & Schwann 2. Sutton & Boveri 3. Watson & Crick 4. Darwin & Wallace

10. Smaller cell is

Answer: More active metabolically

1. Less active metabolically 2. With smaller nucleus 3. With larger nucleus 4. More active metabolically

11. The three kinds of macromolecules present in the plasma membrane are

Answer: Proteins, lipids and carbohydrates

1. RNA, DNA and proteins 2. RNA, proteins and carbohydrates 3. DNA, proteins and lipids 4. Proteins, lipids and carbohydrates

12. Ribosomes in eukaryotes have their origin from

Answer: Nucleolus

1. Nucleus 2. Nucleolus 3. Endoplasmic reticulum 4. Mitochondria

13. Starch is commonly stored in

Answer: Amyloplast

1. Choroplast 2. Amyloplast 3. Chromoplast 4. Leucoplast

14. Rigidity of plant cell wall is due to

Answer: Lignin

1. Pectin 2. Lignin 3. Suberin 4. Cutin

15. Singer and Nicolson's model of plasma membrane differs from Robertson's model in the

Answer: Arrangement of proteins

1. Number of lipid layers 2. Arrangement of lipid layers 3. Arrangement of proteins 4. All of the above

16. Naked DNA is found is

Answer: Chloroplast

1. Chloroplast 2. Nucleus 3. Lysosome 4. Golgi complex

17. Red blood corpuscles placed in 0.5% sodium chloride solution will show

Answer: Bursting

1. Bursting 2. Crenation 3. Plasmolysis4. Turgidity

18. Basal bodies are associated with the formation of

Answer: Cilia & flagella

1. Phragmoplast 2. Cilia & flagella 3. Cell plate 4. Kinetochore 19. Cell sap is

Answer: Nonliving content of vacuole

1. Living content of cytoplasm2. Nonliving content of cytoplasm 3. Nonliving content of vacuole 4. Living content of vacuole

20. folding of inner mitochondrial membrane are called

Answer: Cristae

1. Grana 2. Thylakoids 3. Cristae 4. F0-F121. Material exchange through nuclear pore is facilitated by

Answer: Protein nucleoplasmin

1. Protein rhodopsin 2. Lamina propria 3. Lipid bilayer 4. Protein nucleoplasmin

22. Membrane bound Krebs cycles enzyme is

Answer: Succinate dehydrogenase

1. Fumarase 2. Cis-aconitase 3. Succinate dehydrogenase 4. Malate dehydrogenase23. Which one is different?

Answer: chromosomes-mendel

1. Protoplasm-Huxley 2. Cell-Schwann 3. Vitamin-Funk 4. chromosomes-mendel

24. How many mitotic divisions occur in a cell to produce 256 daughter/somatic cells?

Answer: 8

1.128 2.64

3.32 4.8

25. Carbohydrates present in cell membrane function in

Answer: Cell to cell recognition

1. Attachment of microfilaments 2. Attachment of microtubules 3. Cell to cell recognition 4. Transport of substances

26. Which one is responsible for DNA histone binding?

Answer: both i and ii1. Topoisomerase 2. A=T base abundance3. Both i and ii4. Teloisomerase

27. Which is not a type of DNA marker? Answer: RAPD

1. RFLP2. STR3. SNP4. RAPD 28. Which cannot act as inducer?

Answer: none

1. Allolactose

2. galactosidase

3. IPTG

4. None

29. Which one is not used in making genetically modified crops?

Answer: artificial plasmid of animals

1. vector based on plant virus2. various plasmid DNA3. artificial plasmid of animals4. natural plasmid of agro bacterium30. Exons form which fraction of whole human genome

Answer: 1.5%

1.50.2% 2.19% 3.75% 4.1.5%

31. Who proposed one gene one enzyme hypothesis?

Answer: beadle and tatum

1. Beadle and Tatum2. Meselson and Stahl3. Watson and Crick4. Kornberg

32. Informational molecules of the cell are

Answer: both i and ii1. Protein2. DNA and RNA3. Polysaccharides4. Both i and ii

33. Adapters used in ligation of blunt ended DNA has

Answer: one sticky end and one blunt end

1. One sticky end and one blunt end2. Both sticky ends3. Both blunt ends4. None34. Which protein binds to the unwinded single strand DNA during replication?

Answer: SSB

1. Dna B2. DNA ligase3. SSBprotein4. Primase

35. What is the ratio of absorbance of UV light by pure DNA at 260 nm and 280nm wavelength?

Answer: 1.8

1. 1.8 2. 4.8 3. 10.2 4. 7.8

36. Genome of HIV is

Answer: ssRNA

1.ss DNA 2.ss RNA 3.ds DNA 4.ds RNA

37. A. tumefaciens causes

Answer: Crown gall disease

1. Rust2. Wart3. Crown gall disease4. Hairy root disease

38. An anticoagulant mucopolysaccharide commonly present in animal body is

Answer: Heparin 1. Chondroitin sulphate

2. Keratin sulphate

3. Heparin 4. Hyaluronic acid

39. DNA is composed of repeating units of

Answer: Deoxyribonucleotides 1. Ribonucleosides 2. Deoxyribonucleosides 3. Ribonucleotides 4. Deoxyribonucleotides

40. Casein present in milk is a

Answer: Protein 1. Fat 2. Carbohydrate 3. Protein 4. Bacterium

41. In an experiment, DNA was found to have 31% adenine and 19% guanine. The quantity of cytosine in the said DNA would be

Answer: 19% 1.38% 2.31% 3.19% 4.62%

42. The cancerous cells has ______________ type of division

Answer: uncontrolled

1. Controlled2. Sequential3. Uncontrolled4. Metastatic

43. The cell cycle is divided into

Answer: Interphase & M Phase

1. M & C Phase 2. M & S Phase 3. M & G Phase 4. Interphase & M Phase

44. Why leaves appear green in colour?

Answer: Because they reflect green light

1. Because they absorb blue light

2. Because they absorb red light3. Because they reflect green light4. All

45. Enzyme that catalyze conversion of glucose to ethanol Answer: Zymase 1. Zymase 2. Invertase 3. Maltase 4. Diastase 46. What is the pH of 0.16 M HCl and 0.072 M phosphoric acid? Answer: 0.8 1. 0.8 2. 11.3 3. 12.9 4. 1.3

47. Eukaryotic mRNA is

Answer: Monocistronic 1. Monocistronic 2. Polycistronic 3. Consists SD sequence4. 5' cap is absent

48. Vector used in first cloning experiment in mammalian cell was based on

Answer: SV 40

1. SV 40 2. BPV 3. Adenovirus4. Retrovirus

49. Plant material suited for studying mitosis is

Answer: root apex

1. Candidate Answers: 2. Shoot apex 3. root apex 4. cork50. What are G-proteins?

Answer: GTP binding proteins

1. GDP Binding Proteins2. GTP binding proteins3. GMP binding proteins4. GTP transferring protein 51. The process which cannot take place in the absence of viruses is called:

1. Transformation

2. Conjugation

3. Translocation

4. Transduction

52. Pulse Polio programme is organized in our country to:

1. Cure polio

2. Eradicate polio

3. Spread polio

4. None of these

53. Spoilage of food material is prevented in cold storage is due to:

1. Reduced respiration at low temperature

2. Reduced enzyme activity in the food article

3. Reduced enzyme activity in the microbes as well as food article

4. Purified nature of air

54. The sequence of organelles involved in Photorespiration is:

1. Chloroplast (Mitochondria(Peroxisomes

2. Mitochondria(Choloroplast(Peroxisome

3. Peroxisome(Chloroplast(Mitochondria

4. Chloroplast (Peroxisome(Mitochondria

55. Red blood corpuscles placed in 0.5% sodium chloride solution will show:

1. Bursting

2. Crenation

3. Plasmolysis

4. Turgidity

56. Feedback inhibition is caused by blocking of enzyme of the metabolic pathways

by:

1. Accumulated end products

2. Chemical produced by hormones

3. Hormones

4. Competitive inhibition

57. Membrane permeability is controlled by:

1. Na+2. K+3. Both (1) and (2)

4 Ca2+58. Which one of the following is a biodegradable plastic?

1. Leinolic acid

2. Poly hydoxy butyrate

3. Catechol

4. Formamide

59. The rate of evolutionary processes have gone slow mainly because:

1. The earth has become heated

2. There is lack of water on earth surface

3. The environment has become oxidative

4. The environment has become reductive

60. Which Immunoglobulin is found in maximum percentage of total immunoglobulin

in serum?

1. IgG

2. IgM

3. IgD

4. IgA

61. The genetic material of HIV is a:

1. Single stranded DNA

2. Double stranded DNA

3. Single stranded RNA

4. Double stranded RNA62. The driving force behind evolution is:

1. Sexual reproduction

2. Natural selection

3. Mutation

4. Acquired characters

63. If the frequency of a recessive phenotype is 50% in a large Mendelian population,

what would be frequency of dominant gene?

1. 30%

2. 40%

3. 50%

4. 60%

64. The sequence of bases in tRNA can be represented as:

1. 5C---ACC3

2. 5G---CCA3

3. 5U---UCC3

4. 5A---CCA3

65. Which one of the following is one of the three ancestors of common bread wheat?

1. Solanum

2. Zingiber

3. Oryza

4. Aegilops

66. Which light wavelength promotes germination of seed?

1. Red

2. Blue

3. Far red

4. Red and far red67. Inbreeding leads to sterility mainly because it leads to production of:

1. Recessive homozygous progeny

2. Dominant homozygous progeny

3. Heterozygous progeny

4. Mutant progeny

68. Dehang-Debang Bioreserve is situated in the state:

1. Arunachal Pradesh

2. Assam

3. West Bengal

4. Mijoram

69. ELISA technique is based on:

1. Antigen-Antibody interaction

2. Antigen-Antibody precipitation

3. Antigen Antibody binding

4. None of these

70. The Red Data Book which lists endangered species is maintained by:

1. WWF

2. UNO

3. WHO

4. IUCN

71. Vaccines are:

1. Attenuated microorganism

2. Inactivated microorganisms

3. Both 1& 2

4. None of the above

72. Among the following which gene is not concerned with induction of cancer?

1. Src

2. Ras

3. P534. Actin

73. Which of the following character is controlled by a holandric gene?:

1. Sickle cell anemia

2. Hypertrichosis

3. Blood clotting

4. Phenylketonurea

74. International Rice Research Institute is in:

1 Japan

2. India

3. Phillipines

4. China

75. A protein which is to be degraded in proteosome is tagged with:

1. Polyglycine

2. Polyprolin

3. Ubiquitin

4. Formyl methionine

76. An oligonucleotide DNA sequence tagged with fluorescent tag used to identify

unknown gene by hybridization is termed as:

1. Probe

2. Reporter gene

3. Ligand

4. cDNA77. The example of X-linked inheritance in human is:

1. Hemophilia

2. Colour blindness

3. Both 1 & 3

4. Hypertrichosis

78. The conversion of pyruvic acid to acetyl Co A requires:

1. Oxidative decarboxylation

2. Oxidative deamination

3. Reductive decarboxylation

4. Reductive deamination

79. In human, Downs syndrome results due to trisomic condition of chromosome

number:

1.23

2.22

3.21

4.20

80. Lignin, the most abundant organic substance in plants, is an example of

1. Primary metabolite

2. Secondary metabolite

3. Both 1& 2

4. None of these

81. Post translational modification of proteins occurs in:

1. Nucleus

2. Mitochondria

3. Endoplasmic reticulum

4. Glyoxysomes

82. The complementary gene ratio as observed in interaction between two dominant

genes is:

1.9:7

2.13:3

3.9:3:4

4.15:1

83. Which anticancerous drug has been extracted from Catharanthus roseus?

1. Taxol

2. Vincristine

3. Colchicin

4. Serpentine

84. CDFD, a forensic science laboratory of the Government of India based on

Molecular Biological tools, is located at:

1. New Delhi

2. Hyderabad

3. Madurai

4. Mumbai

85. Covalent bond formation between two atoms takes place by:

1. Transfer of electron from one atom to another

2. One side sharing of electrons

3. Electron sharing by both interacting atom

4. Affinity between two atoms

86. What would be the correct sequence of mRNA if the sequence of bases in template strand is 5CTTGACTGA 3?

1. 5UCAGUCAAG3

2. 5GAACUGACU3

3. 5TCAGTCAAC3

4. 5GAACTGACT387. The bacterial promoter contains sequences rich in:

1. A&T

2. Only A

3. Only T

4. G&C

88. Absorption of water and minerals and fixation of the plant body is the function of:

1. Root system only

2. Vegetative part

3. Shoot system only

4. All of the above

89. A heterozygous tall plant bearing red flower on selfing produced 640 seeds. How many progeny plants in F2 generation would be pure tall bearing white flowers?

1. 10

2. 20

3. 30

4. 40

90. In human body ectoderm is responsible for the formation of:

1. Lens of eye

2. Nervous system

3. Sweat glands

4. All of the above

91. Human eye is sensitive to wavelength in the range of:

1. 330-760 nanometer



4. 300-390 nanometer92. Which one the following does not act as a neurotransmitter?

1. Epinephrine

2. Norepinephrine

3. Cortisone

4. Acetylcholoine

93. The catalytic efficiency of two enzymes may be compared by the:

1. Km value

2. pH optimum value

3. Molecular size of enzyme

4. Formation of the product

94. The enzyme used for alcoholic fermentation by yeast is:

1. Maltase

2. Invertase

3. Sucrase

4. Zymase

95. Certain metabolic inhibitors which inhibit carbohydrate translocation are:

1. 2, 4-dinitrophenol and Arsenic

2. Azide iodoacetic acid and Lead

3. Fluoride, Hydrogen cyanide

4. All of the above

96. If guanine (G) in a given DNA is 32%, what would be the amount of adenine (A)?

1. 16%

2. 18%

3. 64%

4. 68%97. In an inducible operon, the regulator gene produces

1. Inducer

2. Aporepressor

3. Active repressor

4. Co-repressor

98. Histone protein H4 associated with DNA in the chromatin is:

1. Lysine rich

2. Arginine rich

3. Cystein rich

4. Metheonine rich

99. The chromosomes during meiotic division divide during:

1. Anaphase I only

2. Anaphase II only

3. Both Anaphase I and II

4. Diakinesis

100. Which of the following represents the correct order in prophase I of meiosis?

1. Leptotene, zygotene, diplotene, pachytene, diakinesis

2. Leptotene, zygotene, pachytene, diplotene, diakinesis

3. Zygotene, diplotene, pachytene, leptotene, diakinesis

4. Diakinesis, zygotene, diplotene, leptotene, pachytene

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MCQ, 2012,