1. The genus 'Vanilla' belongs to

Orchidaceae

Liliaceae

Poaceae

Cyperaceae

2. The family known to be very rich in alkaloids

Poaceae

Solanaceae

Amaranthaceae

Rananculaceae

3. Petrification is a complex process of protein degradation and results in the production of noxious odours due to amino acid

Deamination

Transamination

Decarboxylation

Deamination followed by decarboxylation

4. Identify the mismatch

Quorum sensing -Population density

Siderophores -Acquires iron

Enterobactin -Acquires magnesium

Idophase -Secondary metabolite production

5. Greenhouse gases in the atmosphere absorb

More visible radiation than infrared

Visible and infrared equally

More infrared radiation than visible

Neither visible nor infrared radiation

6. 16S rRNA is a component of subunit of ribosome

30S

50S

80S

40S

7. Which of the following is not a characteristic of Phylum Annelida?

Parapodia

Notochord

larva

Metamerism

8. Oxidation of which substance in the body yields the most calories

Glucose

Glycogen

Protein

Lipids

9. If the calculated chi-square value is larger than the critical chi-square value, then the researcher should

Accept the null hypothesis

Reject the null hypothesis

Check for a mathematical error

Multiply by the sample size

10. How many carbons an isoprenoid unit has









11. Which of the following permits only selective uptake of minerals in the root?

Pericycle

Epidermis

Endodermis

Root cap

12. Mixotrophic refer to

Microorganisms that combine autotrophic and heterotrophic metabolic processes

Microorganisms that either have autotrophic or heterotrophic metabolic processes

Microorganisms that have photo-and chemo-autotrophic metabolic processes

Microorganisms that combine carbon and nitrogen metabolic processes

13. One among the following is NOT an electron acceptor for anaerobic respiration

NO3+

SO4

Fumarate

Malate

14. Plants that flower only once in their lifetime are known as_.

Monoecious

Monocarpic

Dioecious

Polycarpic

15. Hershey and Chase's experiments

Involved finding radioactivity inside bacteria infected with T2 phage having DNA labeled with 32p.

Involved finding radioactivity inside bacteria infected with T2 phage having DNA labeled with 35S.

Involved finding radioactivity inside bacteria infected with T2 phage having protein labeled with 32p• .

Involved finding radioactivity inside bacteria infected with T2 phage having protein labeled with 35S.

16. Which of the following dyes are used for negative staining

India inklNigrosin dye

Nigrosin dye/Basic fuchsin

Basic fuchsin/Crystal violet

Crystal violetlMalachite green

17. Identify the mismatch

Peptone media -Complex media

Crystal violet media -Characteristic media

MacConkey media -Selective and differential media

Chocolate agar media -Enrichment media

18. An example for an amphibolic pathway is

Glycolysis

Calvin pathway

Embden-Meyerhof-Parnas pathway

Entner-Doudoroff pathway

19. Catalytic dehydrogenation of a primary alcohol gives

Ketone

Aldehyde

Secondary alcohol

Ester

20. Which one among the following is correct for IMViC (Indole; Methyl red; Voges­ Proskauer; Citrate) test for Escherichia coli

MR VP Indole -ve

MR VP Indole +ve

MR VP Indole +ve ..

MR VP Indole -ve

21. The enzyme activity associated with reverse transcriptase that digests the RNA template after DNA has been synthesized

Reverse discriminase .

Lipase-H

RNAse-H

DNAse-H

22. Which among the following statements is TRUE for pili and fimbriae which are very commonly found in many bacteria

These are proteinaceous cell surface appendages which are helpful in attachment, while pili help in cell-cell attachment and useful in genetic exchange, fimbriae help in confinement of cells.

These are proteinaceous (c)ell surface appendages which are helpful in attachment, while pili help in confinement of cells to the surface, fimbriae help in genetic exchange.

These are non-proteinaceous cell surface appendages which are helpful in motility of the bacteria

These are very specialized lipo-protein structures ofbacteria which are useful in cell-to-cell signalling.

23. The list of events that occur during meiosis 1 are listed below

A. Homologous chromosomes are roughly aligned but not physically linked

B. Homologous chromosomes segregate to opposite poles

C. Homologous chromosomes are linked by synaptonemal complexes

D. Homologous chromosomes are linked by chiasmata

E. Chromosomes replicate The correct order of these events is

ACDBE

AECDB

EACDB

EADCB

24. N-linked polysaccharides are attached to

Serine

Glycine

Tryptophan

Asparagine

25. Penicillin acts as an antibiotic in susceptible bacteria by interfering with

Cell wall fOimation

Protein synthesis

Krebs cycle

Electron transport chain

26. In which photosynthetic organism H2S as a donor

Purple sulfur bacteria

Blue sulfur bacteria

Cyanobacteria

Chlamydomonas

27. Bacteria which are commonly associated with the methanogenic bacteria are

Acetogenic bacteria

Methylotrophic bacteria

Iron reducng bacteria

Sulfur reducing bacteria

28. Antibiotic tetracycline binds to subunit of ribosome

50S

30S

32S

80S

29. Lactose is composed of galactose and glucose and which forms a

glycosidic

glycosidic

glycosidic

glycosidic

30. The substance that is general biosynthetic precursor of sex harmones and harmones of adrenal cortex is

Inositol

Sphingomyelin

Lecithin

Cholestrol

31. Carbon sequestration refers to:

The sale of carbon credits in the international market

The process of capture and long-term storage of atmospheric C02

The release of carbon, as C02, into the atmosphere

The accumulation of carbon in the atmosphere

32. Which of the following statement about mitochondria is NOT true?

Size and shape of mitochondria varies in a cell

Mitochondria in the cell can fuse with one another

Large mitochondria in the call can split into two

In all cells, one mitochondria will be exceptionally larger than others

33. Which of the following statement is NOT true for a plant cell?

Ribosomes are smaller than vacuole.

Plant cells have centriole.

Plant cells contain mitochondria

Plant cells are surrounded by a cell wall.

34. In the tall trees water move from the soil to the top of tree by using following property of· water?

Osmosis

Capillary rise

Ionization

Adhesion and cohesion of water molecules

35. If two AaBb individuals are crossed, what is the probability that a particular offspring will show one or both of the dominant traits? and B are dominant to a and respectively, and are unlinked

3/16

9/16

12/16

15/16

36. Multiple sclerosis is a disease related to

Heart

Bones

Nerve cells

Teeth

37. If a Punnett square is made showing Gregor Mendel's cross between true-breeding tall plants and true-breeding short plants, the square would show that the offspring had

The genotype of one of the parents

A phenotype that was different from that of both parents

Genotype that was different from that of both parents

The genotype of both parents

38. The two strands of the DNA double helix are held together by:

Hydrogen bonds.

C=C double bonds.

Hydrophobic bonds.

Peptide bonds.

39. The fluctuation test of Luria and Delbruck (studying resistance of Escherichia coli to bacteriophage Tl infection) showed all of the following except

Mutations are present in the cells before selection

The number of resistant colonies per clone was similar on all plates

The variance in resistant colony number was very much greater between cultures than within them.

The production of mutations is non-random with respect to their effects on the phenotype

40. Which one of the following are collectively called the calyx.

Sepals

Petals

Tepals

Stamens


41. A light receptor in certain bacteria resembles that found in the eyes of animals and they are referred as

Photochrome

Rhodopsin

Bacteriolysin

Bacteriorhodopsin

42. Benzaldehyde and acetone be best distinguished using

Hydroazine

Tollen's reagent

Sodium hydroxide solution

2,4-DNP

43. Cyanobacteria contains a special pigment complex called·

Light harvesting complex

Phycobilisome

Phycoerythrobiline

Bacterial Pigment complex

44. Amino acids are synthesized from

Fatty acids

Carbohydrates

a-keto acids

Proteins



45. Spore formation is absent in

Archaea

Bacteria

Plants

Archaea and Bacteria

46. Which of the following statements is TRUE regarding the ABO blood system?

People of type A normally would not produce the anti-A antibody

People of type B normally would produce the anti-B antibody

People who are type AB normally produce both anti-A and anti-B antibodies

people of0 blood group do not produce anti-A and anti-B antibodies

47. Eukaryotic and multicellular body forms are not observed in one of the following:

Monera

Fungi

Plantae

Animalia­

48. Which of the following is a correct statement about biological nitrogen fixation carried out by legumes?

Plants convert nitrogen to ammonia

Plants convert ammonia to nitrate.

Fungus growing on plants produce ammoni(a)

Bacteria convert nitrogen to ammonia

49. Satity center regulating food intake is in

Liver

Hypothalamus

Medulla oblongata

Stomach

50. What is difference between Phosphene and Phosphine?


Phosphene is a phenomenan characterized by the experience of seeing light without light actually entering the eye whereas phosphine is the name of flammable toxic gas which is a group of organophosphorous compound

Phosphine is a phenomenan characterized by the experience of seeing light without light actually entering the eye whereas phosphene is the name of flammable toxic gas which is a group of organophosphorous compound

Phosphene is the name of organic compound which posses two alkenes group combined with phosphoric acid whereas phosphine is the name of flammable toxic gas which is a group of organophosphorous coumpond

Phosphene is the name of plant disease which occur due to high phosphorous toxicity inplantswhereasphosphine isthephenomena ofdeficiencyofphosphorous inhuman bone.

51 In competitive inhibition, an inhibitor:

Bind$ at several different sites on an enzyme

Binds reversibly at the active site

Binds only to the ES complex

lowers the characteristic Vmax of the enzyme

52. The process by which proteins are synthesized in cell is known as:

Replication

Transcription

Transformation

Translation

53. A characteristic feature for saturated fatty acid is

Low melting point

High melting points

Short hydro carbon chain

Nonlinear side chain

54. DNA microarrays have been widely used in genomic studies because they can

Eliminate the function of any gene in the genome

Help in analyzing the expression of many genes in the genome to be compared at once

Help in introducing entire genomes into bacterial cells

Dramatically enhance the efficiency of in vitro mutagenesis

55. The stage of cell division in which DNA replicates is called

Interphase

Metaphase

Anaphase

Telophase

56. In humans. drug detoxification majorly occurs in

Heart

Bone marrow

Liver

Lungs

57. A person with Klinefelter's syndrome exhibits one ofthe following conditions

Triploid

Haploid

Monosomic

Trisomic

58. For the flower induction, the vernalization signal in plants is perceived mainly by:

Young leaves subtending the apical meristem

Mature leaves near the root shoot junction

All vegetative parts

Shoot apical meristem

59. Alkaloid production in plants is regulated by change in the endogenous pool of:

Gibberellins

Jasmonates

Brassinosteroids

Abscisic acid

60. An organism with two identical alleles for a given trait is

Homozygous

Segregating

Dominant

Unusually rare

61. A chemical called Polyethylene glycol is commonly used as precipitant for plasmid DNA isolation and to concentrate viruses. PEG is also used in complete fusion of biomolecule. How PEG is prepared commercially?

By heating ethanol with excess of concentrated sulphuric acid at 170°C

By hydrolysis of ethylene oxide with water at 200°C under pressure. Polymerization depends upon the ratio of reactants.

When ethylene glycol reacts with PCls first to form ethylene chlorohydrin and then polymerization occurs to form PEG

When ethylene reacts with HOCI, it form ethylene chlorohydrin. This is followed by reaction with carboxylic acid in the presence of mineral acid to form PEG

62. Malaria fever is caused by .

Plasmodium falciparum

Trypanosoma brucei

Cockroach

House fly

63. Removal of outer exoskeleton is the process called

Metamorphosis

Ecdysis

Paedogenesis

Gametogenesis

64. If the amino acid net charge is zero is called

Ionizable

Isoelectric point

Stereochemistry

Chiral center

65. Dark-grown seedling display 'triple response' when exposed to ethylene. Which one of the following is not a part of 'triple response'?

Decrease in epicotyl elongation

Rapid unfolding and expansion of leaves

Thickening of shoot

Horizontal growth of epicotyl

66. Which one of the following is part of carbohydrates,proteins and nucleic acids?

Nitrogen 11

Carbon

Magnesium

Iron



67. The function of contractile vacuole

Nutrition

Reproduction

Osmoregulation

Locomotion

68. High Density Lipoprotein is synthesized and secreted from

Pancreas

Liver

Kidney

Muscle

69. What is the term for the symbiotic association between fungi and cyanobacteria?

Lichen

Mycorrhizae

Epiphyte

Nitrogen-fixing nodule

70. The biochemical reaction involving adding sugars to proteins is called as

Glucogenesis

Glycolysis

Glycosylation

Glalactolation

71. Two different restriction enzymes digesting within the same recognition sequence are called as

Endo restriction enzymes

Isoschizomers

Exo restriction enzymes

Palindromes

72. The filamentous DNA and protein that can be stained in Interphase nuclei is called

Solenoid

Nucleosome

Chromatin

Polytene

73. A mature fruiting body of an ascomycete fungal organism is referred as

Peritheicum

Epithecium

Apotheicum

Trichogyne

74. Enterokinase is involved in the conversion of

Pepsinogen to pepsin

Trypsinogen to trypsin

Caseinogen to casein

Glycogen to glucose

75. Ephyra larva is found in the life cycle of

Fasciola

Obelia

Sycon

Aurelia

76. Why do glycolipids exist almost exclusively on the exterior side, bit not on the cytoplasmid side of the cell membrane?

The inner layer of the membrane is not thick enough to accommodate carbohydrates

Carbohydrates are added only to lipids on the luminal side of the ER and Golgi

Flippases more the glycolipids to the exterior side of the membrane

Carbohydrates are enzymatically removed from the cytoplasmic side of the membrane

77. Which era is called the "Age ofReptiles"?

Coenozoic Era

Mesozoic Era

Palaeozic Era

Archeozoic Era

78. Binomial nomenclature was proposed by

Linnaeus

Mendel

Koch

Lamarck

79. Natural rubber is extracted from the plant that belongs to the family

Boraginaeeae

Apoeynaeeae

Asteraeeae

Euphorbiaeeae

80. Finger millet is

Setaria italica

Eleusine coraeana

Pennesetum glaueum

Sorghum hieolor

81. In which system the stone canal is found

Circulatory system ofEarthworm

Respiratory system ofUnio

Water vascular system of Starfish

Excretory system ofPeripatus

82. Statocyst of prawn is an organ which is associated with

Locomotion

Equilibrium and orientation

Excretion

Chemoreception

83. Gigantism are rare condition that causes abnormal growth in children. Acromegaly is one ofthe hormonal disorder. Both gigantism and acromegaly occurs due to

Hyperpituitarism

Hypothyroidism

Hypopituitarism

Hyperthyroidism

84. The property of a living organism to emit light called "Bioluminescence". This is well marked phenomena of the animals belong to which of the following phylum or class?

Cnidaria

Echinodermata

Chondrichthyes

Ctenophora

85. Some of the distinctive cell line in the interior body walls of sponges have a central flagellum that is surrounded by a collar of microvilli. These cells are called

Pinacocytes

Chaonocytes

Archaeocytes

Sclerocytes

86. In the presence of AICh, benzene reacts with methyl chloride in Friedel-Craft's reaction to form

n-Propylbenzene

Xylene

Benzene hexachloride

Tuluene



87. "Toddy palm" is

Phoenix sylvestris

Caryota urens

Borassus flabellifera

Cocas nucifera



88. Botulism is

Bacterial disease in man

Bacterial toxin produced in milk

Bacterial disease in plants

A type of bacterial food poisoning

89. In humans, inactivation of X-chromosomes in a given cell of female embryos involve

Only maternal X-chromosome

Only paternal X-chromosome

Either maternal or paternal X-chromosome

Both maternal and paternal X-chromosomes

90. Offspring of heterozygous parents (Aa at a single locus) are 25 percent AA, 50 percent Aa and 25 percent aa, then all of the following are true except:

The parents are diploid organisms

The allele is recessive lethal

The alleles assort independently

The gametes combine at random

91. The association between cattle and rumen bacteria is a well known example of

Antibiosis

Parasitism

Obligate symbiosis

Neutralization

92. Muscle of heart walls called as

Myocardium

Myonemes

Myocyte

Columnae camae

93. Insulin is a

Peptide enzyme

Peptide hormone

Nucleotidyl molecule

Carbohydrate

94. Conversion of nitrite to nitrate in soil is done by the bacteria

Azotobacter

Nitrosomonas

Nitrobacter

Pseudomonas

95. A messenger RNA is 336 bases long including the initiation and termination codon. The number of amino acids in the polypeptide translated from this is

110

(b)333

111

(d)600

96. Charles Darwin discussed all of the following except

Natural selection removes organisms that are poorly adapted to their environment

Individual within a species exhibit variability in form and function

Organisms produce more offspring than can survive

Gene mutations are the sources of variation for evolution

97. Which Co-enzyme is involved in transaminase reaction?

TPP

NAD+

Biotin

Mg+

98. Which one of the following viruses cause acute gastrointestinal illness due to contamination of drinking water?

Norovirus

Poliovirus

Rotavirus

Filoviruses

99. The vitamin which is essential for blood clotting is

Vitamin-A

Vitamin-B

Vitamin-C

Vitamin-K

100. Genes Band C control three phenotypes which assort independently. A plant with the genotype Aa Bb Cds selfe(d) What is the probability for progeny which shows the dominant phenotype for AT LEAST ONE of the phenotypes controlled by genes B and