CUSAT CAT 2019 Question Paper Life Scince

CAT 2019 – LIFE SCIENCE

019
2
S T
E
1. T
According to Geologists the characteristics of life occurred first in
N
O
(A)
(B)
Palaeozoic era
Mesozoic era SI
(C) IS
Protozoic era
M
M
(D) Coenozoic era
D
A

N
2. O
The components used by Miller in his experiment for obtaining amino acids and other
M
O
organic matters are
M

SAT
CO (A)
C T E
Methane, water vapour, ammonia and hydrogen
(B) Carbon-di-oxide, oxygen and nitrogen
(C) Methane, ethane and ammonia

CU
T
(D) Ammonia, ethylene and nitrous oxide

A N 19
S IO
3. According to ‘fluid mosaic model’, the correct sequence of biomolecules in the plasma
membrane is
2 0
(A)
U
C IS
(B)
(C) S E
T
Lipid-Protein-Protein-Lipid
S
Protein-Protein-Lipid-Lipid
T
Protein-Lipid-Lipid-Protein
(D)
N
Protein-Protein-Lipid-Protein

O
4.
M IS
S I
In which of the following tissue the highest number of mitochondria are found?

(A)
D M
Meristematic tissue

(B) Storage tissue
(C)
A
Xylem tracheid
(D)
N
Xylem vessel
O
5. M
True nucleus is absent in which one of the following?
M
(A)
(B)
Green algae
Bacteria C O
(C) Lichen
AT
(D) Fungi
S
CU

6. Cellulose is strongly

(A) Hydrophobic 019
(B) Hydrophilic 2
(C) Lipophilic
S T
E
(D) Ionophilic
T
N
O
7. I
The cell organelles can better be isolated by
S
IS centrifugation
(A) Caesium chloride
(B) gradient M
(C) ultraA
M
Dcentrifugation
centrifugation

N
(D) differential centrifugation
O
M
8.

SA
T
O
M
O E
In a DNA segment consisting of TCC, CAA, TCG, ACC, CCT and TCA gets mutated in
C the first nucleotide. The effect of this on coding by this segment would result in
C T
(A) change of the first amino acid

CU
T
(B) change of the whole amino acids in the sequence

A N
(C) no change in the amino acid sequence
9
(D) change of the last amino acid in the sequence
1
S IO 2 0
U S
9. Sex determined cells usually possess

ST
C IS E
(A) twice the amount of DNA as the body cell
(B)
T
twice the amount of RNA as the body cell
(C)
N
half the amount of DNA as the body cells
(D)
O
thrice the amount of DNA as the body cells

M IS
S I
D
10. Ploidy level of endosperm in plant seeds is
M
(A) Haploid
(B) Diploid
A
(C)
N
Polyploid
(D)
O
Triploid

M
11. The number of chromosomes can be M
increased in plants by applying

C O
(A) thermo-treatment mechanism
(B) hormone treatment T

(D) hybrid vigour S
A
(C) colchicine treatment

CU

12. Stomata are usually confined in more numbers on the

(A) upper side of leaf 019
(B) lower side of leaf 2
(C) lateral stem
S T
E
(D) leaf base
T
N
O
13. I
Leaf abscission takes place at
S
(A) internodes I
S
(B) nodes M
D
M
A of petiole
(C) the base

(D) theNmargin of leaf
O
M
14.

SA
T
O
M
O E
Those plants which require usually 8-10 hrs of light period and continuous dark period of
C about 14-16 hrs for subsequent flowering are called
C T
(A) Short day plants (SDP)

CU
T
(B) Long night plants (LNP)

A N
(C) Both (A) and (B)
(D) Long day plants (LDP)
19
S IO 2 0
U S
15. Starch, inulin and glycogen are the examples of

ST
C IS E
(A) storage polysaccharides
(B)
T
structural polysaccharides
(C) oligosaccharides
N
(D) monosaccharides
O
M IS
S I
D
16. Organic compounds having both acidic and basic properties are called
M
(A) autophagic molecule
(B)
A
dextrorotatory molecule
(C)
N
levorotatory molecule
(D)
O
amphoteric molecule

M
17. M fatty acid?
Which among the following is not a saturated

(A) Palmitic acid C O
(B) Stearic acid
A T
(D) Myristic acid S
(C) Oleic acid

CU

18. Liquid form of triglycerides at ordinary room temperature are called

(A) Fats 019
(B) Oils 2
(C) Cheese
S T
E
(D) Wax
T
N
O
19. I
Which one among the following is a sulphur containing aminoacid?
S
(A) Cysteine I
S
(B) Leucine M
A
(C) Valine
D
M
N
(D) Alanine
O
M
20.

SA
T
O
M
O
C (A) C-phycocyanin
C T
(B) C-phycoerythirn E
Predominating pigment found in Rhodophyceae is called

CU
T
(C) Chlorophylls with carotenoids

N
(D) Phycobilin

21. A
S IO
Vitamin B5 is also known as
2 0 19
(A)
(B)
(C)
(D)
U S
Niacin

C IS
Riboflavin
Phylloquinone
Thiotic acid T E ST
N
O
22.
M S I
What type of light is required for maximum inhibition of flowering at about the middle of
IS
D
critical dark period in context to short-day plants?
M
(A) Red
(B) Green
A
(C) Violet
N
(D) Blue
O
M
23. The carbon isotope used in the study M
of photosynthesis is

(A) C C O
T
13
(B) C
A
14
(C) C 15
S
(D) C 3

C U

24. Dark reaction of photosynthesis is also known as

(A) Hill reaction 019
(B) Blackman reaction 2
(C) AMP pathway
S T
E
(D) Glyoxylate cycle
T
N
O
25. I
C4 plants are more efficient photosynthetically than C3 plants because of the absence of
S
IS in C plants
(A) Photoperiodism
M in C plants
M
4

D
(B) Photorespiration 4

A electron transport in C plants
(C) Non-cyclic

4

N electron transport in C plants
(D) Cyclic
O
4

M
26.

SA
T
O
M
C (A) 286 Kcal
(B) 486 Kcal
O
C T E
How much energy is contained in one molecule of glucose?

CU
T
(C) 686 Kcal

N
(D) 886 Kcal

27. A
S IO 2
Pinus species are commonly found in 0 19
(A)
(B)
(C)
(D)
U
C IS S T
Temperate regions of Northern hemisphere
S
Temperate regions of Southern hemisphere

T E
Tropical region of Northern hemisphere
Tropical regions of Southern hemisphere
N
O
28.
M S I
Which one of the following plants is a total stem parasite?
IS
(A)
D M
Rafflesia sp.

(B) Utricularia sp.
(C)
A
Drosera sp.
(D)
N
Cuscuta sp.

O
29. M
The stamen in angiosperm is the male reproductive part and generally may be
differentiated into M
(A) anther only C O
(B) anther and stalk
AT
(C)
S
anther, filament and connective
(D)
U
anther and filament
C

30. The map showing relative distance of linked genes on a chromosome during transfer of
characters is called
019
(A) linkage map 2
(B) linked genes
S T
E
(C) autosomes
(D) allosomes T
N
O
I
Reversal of a seriesSofSnucleotides in the gene is called inversion. For this action of gene
31.
I
M requires
M
mutation, the inversion
D
A
(A) one breakage only

N
(B) two breakage
(C) Othree breakage
M
M
O
(D) no breakage

SA
CO
C T E
T During cell division the centromere divides at
32.

CU
AT
(A) Prophase
(B) Metaphase
(C) Anaphase
N 19
S IO 0
(D) Telophase
2
33.
U S ST
The chromosomes become arranged at the equator during

(A)
C IS
Anaphase of meiosis-I
T E
(B)
N
Metaphase of mitosis
O
M
(C) Metaphase of mitosis and metaphase of meiosis-I and II
(D)
S I
Only at metaphase of meiosis-II

IS
34.
D M
In monocots, such as grasses, oats and maize, the plumule in the seed remains covered by

(A)
(B)
A Petiole
O
Shoot apex
D
a protective cap-like structure called

N
A
(C) Root apex
M
(D) Coleoptile
M
C O
AT
S
CU

35. In monocot seedling, the highest concentration of auxin is found in the

(A) stem 019
(B) bud 2
(C) coleoptile
S T
E
(D) flower
T
N
O
36. I
The number of calories required to change one gram of liquid into vapour is called
S
(A) Heat capacity IS
M of evaporation
D
M
(B) Latent heat
A before freezing
(C) Expansion

N
(D) Nucleation
O
M
37.

SA
T
O
M
O E
When the plant cell or the tissue is placed in hypertonic solution, the water comes out of
C the cell sap into the outer solution and the cell becomes flaccid. This process is known as
C T
(A) Turgor pressure

CU
T
(B) Wall pressure

A N
(C) Exosmosis
(D) Endosmosis
19
S IO 2 0
U S
38. Which of the following requires metabolic energy for mineral salt absorption?

ST
C IS E
(A) Active absorption
(B) Passive absorption
T
(C) Endosmosis
N
(D) Exosmosis
O
M IS
S I
D
39. “Late blight of potato” is caused by
M
(A) Phytophthora infestans
(B)
A
Erysiphe polygoni
(C)
N
Albugo candida
(D)
O
Puccinia graminis

M
40. White blood cells that are nonspecificM
killers of microbes are

(A) B cells C O
(B) Phagocytes
A T
(D) Helper T cells S
(C) Killer T cells

CU

41. Antibodies are synthesized by

(A) B lymphocytes 019
(B) Phagocytes 2
(C) Helper T lymphocytes
S T
E
(D) Killer T lymphocytes
T
N
O
42. I
Concave surfaces of mammalian RBCS is helpful in
S
S
(A) formation ofI more haemoglobin
Mthe surface area of rbc
D
M
(B) increasing s

A surface tension of plasmamembrane
(C) reducing

N
(D) providing more space for haemoglobin
O
M
43.

SA
T
O
M
O
C (A) Membrane fluidity
C T E
Which of the following factors does not determine the shape of the cell?

(B) Size of the vacuole

CU
T
(C) Viscosity of the cytoplasm

N
(D) Cell-cell distance

44. A
S IO
Chromosomes are held together by
2 0 19
(A)
(B)
(C)
(D)
U S
securin

C IS
separase
cohesin
mitogen factor T E ST
N
O
45.
M S I
The degree of transport across cell membrane is the
IS
(A)
D M
highest for hydrophobic molecules

(B) lowest for hydrophobic molecules
(C)
A
highest for ions
(D)
N
highest for polar molecules

O
46. M
Which of the following is the least predominant granulocyte in blood?
M
(A)
(B)
neutrophil
eosinophil C O
(C)
(D)
basophil
plasma cell AT
S
CU

47. The life span of erythrocytes is

(A) 120 days 019
(B) 90 days 2
(C) 60 days
S T
E
(D) 150 days
T
N
O
48. I
Which of the following is the precursor of germ cells?
S
(A) Zygote IS
M
D
M
(B) Gastrula
(C) A
Blastula

(D) N
Primordial germ cell
O
M
49.

SA
T
O
M
O E
Zona pellucida is rich in the
C (A) proteins and oligosaccharides
(B) lipids
C T
CU
T
(C) enzymes

N
(D) granules

50. A
S IO
The G0’ value for ATP is
2 0 19
(A)
(B)
(C)
(D)
U
C IS S
-7.3 kcal/mol
+7.3 kcal/mol
-7.3 kJ/mol
+7.3 kJ/mol T E ST
N
O
51.
M S I
The term hydride ion is used to refer to
IS
(A)
D M
one proton and two electrons

(B) two protons and one electron
(C)
A
two protons
(D)
N
two electrons

O
52. Deficiency of HGPRT leads to M
M
(A)
(B)
SCID
Hartnup’s disease C O
(C)
(D)
cystinuria
gout AT
S
CU

53. Carnosine is the precursor of

(A) anserine 019
(B) PRPP 2
(C) uric acid
S T
E
(D) purine
T
N
O
54. I
Indole derivative is excreted in urine during
S
IS
(A) Hartnup’s disease
(B) cystinuriaM
A
D
(C) cysteinuria
M
N
(D) indoluria
O
M
55.

SA
T
O
M
O E
Enzyme catalyzing conversion of ATP to 3’5’ cyclic AMP is
C (A) cyclic AMP synthese
C T
(B) cyclic AMP synthetase

CU
T
(C) adenylyl cyclase

N
(D) ATP hydrolase

56. A
S IO 2 0 19
Hydroxyapatite chromatography is used exclusively for the separation of

(A)
(B)
(C)
(D)
U
C IS S
proteins
enzymes
nucleic acids
lipids T E ST
N
O
57.
M S I
Which of the following viruses is compound of segmented double-standard RNA?
IS
(A)
D M
Herpes virus

(B) Adenovirus
(C) Reovirus
A
(D)
N
Poxvirus

O
58. M
Which of the following virus contains structurally essential lipid?
M
(A)
(B)
Herpes virus
Papovavirus C O
(C)
(D)
Adenovirus
Picornavirus AT
S
CU

59. In cells infected with virus actual synthesis of virus is immediately preceded by

(A) adsorption 019
(B) penetration 2
(C) eclipse
S T
E
(D) release
T
N
O
60. I
The genus Candida reproduces by
S
IS
(A) arthospore formation
M formation
D
M
(B) blastospore
A formation
(C) ascospore

N
(D) sporangiospore formation
O
M
61.

SA
T
O
M
C (A) skeletal
(B) mucosal
O
C T E
The most common form of sporotrichosis is

CU
T
(C) lymphocutaneous

N
(D) visceral

62. A
S IO 2 0 1
Antigenic variation is most extensive in
9
(A)
(B)
(C)
(D)
U S
smallpox virus

C IS
influenza virus
herpesvirus
measles virus T E ST
N
O
63.
M S I
The incubation period of viral hepatitis type A is
IS
(A)
D 60-90 days
M
(B) 15-45 days
(C) 5-10 days
A
(D) 2-5 days
N
O
64. M
The tetracyclines are identical in their overall mechanism of action to
M
(A)
(B)
sulfonamides
penicillin C O
(C)
(D)
isoniazid
chloramphenicol AT
S
CU

65. The reaction that occurs when antibody and soluble antigen are mixed is demonstrated by

(A) agglutination test 019
(B) precipitin test 2
(C) adsorption test
S T
E
(D) hemagglutination test
T
N
O
66. I
A newborn infant’s blood contains high levels of
S
(A) IgA IS
M
D
M
(B) IgG
(C) IgM A

(D) N
IgE
O
M
67.

SA
T
O
M
O E
At what age does the thymus reach its maximal size?
C (A) During the first year of life
C T
(B) Teenage years (Puberty)

CU
T
(C) Between 40 and 50 years of age

N
(D) After 70 years of age

68. A
S IO 2 0 19
Somatic mutation of immunoglobulin genes accounts for

(A)
(B)
(C)
(D)
U
C IS S
allelic exclusion
ST
class switching from IgM to IgG
affinity maturation
All of the above T E
N
O
69.
M S I
A slide of macrophages are stained by immunofluroscence using a monoclonal antibody
IS
D
for the TAP1 / TAP2 complex. Which of the following intracellular compartments would
M
exhibit positive staining with this antiobody?

A
(A)
(B)
(C)
O
N
A
D
Cell surface
Endoplasmic reticulum
Golgi apparatus
(D) Macrophages
M
M
C O
AT
S
CU

70. Which of the following are examples of mechanisms for the development of
autoimmunity?
019
(A) Polyclonal B cell activation 2
(B) Tissue damage
S T
E
(C) Increased expression of TCR molecules
(D) T
Increased expression of class II MHC molecules
N
O
S I
71.
IS
Malarial parasites are cultivated in the
M
D
(A) blood agar

M
(B) HelaAcell culture

N 1640
(C) RPMI
O
(D) NNN medium
M

SA T
O
M
O
C T
(A) four nuclei E
72. C Mature Entamoeba histolytica cyst is characterized by the presence of

CU
T
(B) chromatoid bars

A N
(C) glycogen mass
(D) binucleate stage
19
S IO 2 0
U S
73. Nocturnal periodicity of microfilaria is in relation with their occurrence in the

ST
C IS E
(A) Peripheral blood
(B) Urine
T
(C) Lymph
N
(D)
O
Blood of internal organs

M IS
S I
D
74. Who investigated the microbial oxidation of Ferrous ion, Fe2+ the reduced form of iron to
M
Ferric iron, Fe3+ the oxidized form, an essential component of rust?

(A)
(B)
(C)
A O
N
A
D
Martinus Beijerinck
Serge Winogradsky
Selman Walksman
(D) Jacob Lipman
M
M
The nematode predator fungus is O
75.
C
(A) Rhizoctonia solani T
SA
(B) Arthrobotrys oligospore

CU
(C) Rhizopus nigricans
(D) S.carlsbergensis

76. The average number of nucleotides in the Okazaki fragments of prokaryotes is

(A) 1500 nucleotides 019
(B) 150 nucleotides 2
(C) 1000 nucleotides
S T
E
(D) 750 nucleotides
T
N
O
77. I
‘Turner syndrome’ are most monosomic and have the chromosome
S
(A) 47 XXY I
S
(B) 46 XX M
(C) 45 XA
D
M
(D) 47NXYY
O
M
78.

SA
T
OA

O
Msingle base substitution in DNA that changes a codon for one amino acid into a codon
C for another is called
C T E
(A) frame-shift mutation

CU
T
(B) point mutation

A N
(C) nonsense mutation
(D) missense mutation
19
S IO 2 0
U S
79. The protein that binds to DNA to switch on transcription by RNA polymerase is

ST
C IS E
(A) apoinducer
(B) corepressor
T
(C) inducer
N
(D) CAP (CRP)
O
M IS
S I
D
80. The consensus sequence TATAATG centered about 10bp before the start point of
M
bacterial genes is referred as

(A)
(B)
(C)
A O
N
A
Probnow box
D
position effect

Hogness (TATA) box
(D) Homeo box
M
M
C O
AT
S
CU

81. In lysogeny, new properties are conferred on the bacterial cell by products of

(A) bacterial genes 019
(B) sex factor genes 2
(C) prophape genes
S T
E
(D) colicigenic genes
T
N
O
82. I
The attachment of aminoacids to their specific tRNA molecules are facilitated by the
S
enzyme
IS
M
(A)
(B)
D
M
aminoacyl tRNA transferase
A
sigma factor

(C) N
reverse transcriptase
(D) O
RNA polymerase
M

S
83.
AT
M

(A)
O E
COWhen DNA is denatured, the optical density increased; this characteristic is called as
C T
hyperchromicity

CU
T
(B) hybrid-arrested translation

A N
(C) G-banding
(D) disjunction
19
S IO 2 0
U S
84. The test used to determine the carcinogenic potential of a chemical is called

ST
C IS E
(A) replica planting test
(B) Kornberg assay
T
(C) Ames test
N
(D)
O
insertion frequency test

M IS
S I
D
85. Autonomously replicating sequence (ARS) is a characteristic feature of
M
(A) plasmid vectors
(B)
A
phage vectors
(C)
N
E.coli vectors
(D)
O
yeast vectors

M
86. M of proteins are based on their
In gel filtration chromatography, separation

(A) size and net charge C O
(B) size and shape
A T
S
(C) size and specific affinity

U
(D) shape and net charge
C

87. In order to obtain virus-free plants through tissue culture, the best method is

(A) meristem culture 019
(B) protoplast culture 2
(C) anther culture
S T
E
(D) embryo culture
T
N
O
88. I
Ropiness of bread is caused by
S
IS
(A) Bacillus subtilus
M expansum
D
M
(B) Penicillium
A nigricans
(C) Rhizopus

N
(D) Leuconostoc sp.
O
M
89.

SA
T
O
M
O E
Meats, low in carbohydrates are decomposed by
C (A) non-proteolytic species
C T
(B) proteolytic species

CU
T
(C) osmophilic organisms

N
(D) lipophylic organisms

90. A
S IO 2 0 19
High temperature short-time pasteurization is a process that occurs at

(A)
(B)
(C)
(D)
U S
71.5oC for 2 minutes

C IS
62.0oC for 30 minutes
71.5oC for 15 seconds
71.5oC for 5 seconds T E ST
N
O
91.
M S I
The aroma or taste of beer is provided by the addition of
IS
(A)
D sulfite
M
(B) dextrins
(C) hops
A
(D) lysine
N
O
92. M
Rennin is a proteolytic enzyme used in the manufacture of
M
(A)
(B)
Beer
Wine C O
(C)
(D) Cheese AT
Single cell protein

S
CU

93. The ‘heaviness’ or ‘lightness’ of beer is caused by the presence of relatively non-
fermentable compound called
019
(A) pectins 2
(B) sorghum
S T
E
(C) dextrins
(D) rice starch T
N
O
SI
94.
IS a chemical reaction of a compound with the solvent is called as
The formation of ions by
M
D
(A) electrolysis
(B) redox
M
Areaction

N
(C) ionization
(D) O
M dissociation

SA T
O
M
O
C T
(A) Tyndall effect E
95. C Light scattering by a colloidal dispersion is called as

CU
T
(B) Colloidal dispersions

A N
(C) Brownian movement
(D) Emulsions
19
S IO 2 0
U S
96. ‘If a system is in equilibrium, and a change is made in its conditions, the system will

ST
change in whichever way most directly restores equilibrium’ is called

(A)
(B)
C IS T E
Le Chatelier’s principle
Dalton’s Law
O
N
M
(C) Law of multiple proportions
(D)
S I
Law of Guldberg and Waage

IS
97.
D M
The reaction of an ester with sodium or potassium hydroxide to give an alcohol and the

(A)
(B)
A
salt of an acid is

N
A
D
saponification
O
stereoisomer
(C) salt bridge
M
(D) reductive process
M
C O
AT
S
CU

98. Which of the following conceptual spheres of the environment is having the least storage
capacity of matter?
019
(A) Atmosphere 2
(B) Lithosphere
S T
E
(C) Hydrosphere
(D) Biosphere T
N
O
SI
99.
IS
India has the world’s largest share of
M
(A) Manganese
(B) MicaA
D
M
N
(C) Copper
O
(D) Diamond
M

SA
O
M
O E
100.C As per the FAO definition the minimum percentage of depletion of tree crown cover, that

C T
T can be considered as deforestation is
CU (A) 50%
(B) 60%
(C) 70%
AT N 19
S IO 0
(D) 90%
2
101.
U S ST
Which of the following are major players is phosphorus cycle?

(A)
C IS
Human beings and fish
T E
(B)
N
Human beings and marine birds
O
M
(C) Fish and marine birds
(D)
S
Animals and fish I
IS
102.
D M
Who introduced the concept of biodiversity hotspot?

(A)
(B)
(C)
A WWF
O
N
A
D
Christopher Columbus
Norman Myers

(D) Charles Darwin
M
M
C O
103. What is the maximum allowable concentration of fluorides in drinking water?

(A) 1.0 milligram per literT
(B) 1.25 milligram per A
S liter
C U
(C) 1.50 milligram per liter
(D) 1.75 milligram per liter

104. Septic tank is

(A) 019
an aerobic attached growth treatment system
(B) 2
an aerobic suspended growth biological treatment system
(C) T
an anaerobic attached growth biological treatment system
S
E
(D) an anaerobic suspended growth treatment system
T
N
O
105. I
Population pyramids are useful to
S
S
(A) express the Ipopulation growth rates
M age-sex distribution of a population
D
M
(B) express the
A the birth rates
(C) indicate

N the death rates
(D) indicate
O
M

SA T
M
O
C T
(A) Enterobacter E
106. Snapping division, a distinctive type of binary fission resulting in an angular or a palisade
COarrangement of cells is characteristic of the genus

CU
T
(B) Klebsiella

A N
(C) Salmonella
(D) Corynebacterium
19
S IO 2 0
U S
107. The bacterium which help to maintain the normal intestine balance, possess

ST
antitumorigenic activity and to reduce serum cholesterol levels is

C IS
(A)
(B)
Bifidobacterium sp.
N
T E
Lactobacillus acidophilus
O
M
(C) Lactobacillus bulgaricus
(D)
S I
Streptococcus thermophilus

IS
108.
D M
N-acetyl-glucosamine and N-acetyl-muramic acid are fundamental building blocks for

A
(A)
(B)
(C)
capsule

O
N
A
D
peptidoglycon
lipopolysaccharide
(D) outer membrane
M
M
109. Reoviruses possess
C O
(A) a lipid envelope
AT
(B) one capsid
S
(C)
(D) two capsids
CU
capsomeres connected to six neighbouring capsomers

110. Which of the following is not a component of chlorophyll?

(A) Calcium 019
(B) Carbon 2
(C) Magnesium
S T
E
(D) Hydrogen
T
N
O
111. I
Monosporic eight-nucleated female gametophyte is found in
S
(A) adoxa IS
M
D
M
(B) onion
(C) A
fritillaria

(D) N
polygonum
O
M

SA
M
T (B) RuBP
3

O
C T E
112. In C plants, first stable product of phosynthesis during dark reaction is
CO (A) PGA

CU
T
(C) Pyruvic acid

N
(D) Oxaloacetic acid

113. A
S IO 2 0 19
A drug which reduces high blood pressure is obtained from

(A)
(B)
(C)
(D)
U
C IS S
Aconitum chasmanthum
Centella asiatica

T
Rauvolfia serpentine
Solanum nigrum
E ST
N
O
114.
M S I
Aggregate fruit is defined as the one which develops from
IS
(A)
D M
multicarpellary apocarpus gynoecium

(B) multicarpellary syncarpous gynoecium
(C)
A
multicarpellary superior ovary
(D)
N
complete inflorescence

O
115. M
Angiosperms differ from the gymnosperms

(A) in having compound leavesO
M
(B) being ever green
(C) being smaller in size T
C
SA
(D) in having ovules enclosed in ovary

CU

116. In helminthes, flame cells are component of their

(A) reproductive system 019
(B) excretory system 2
(C) nervous system
S T
E
(D) respiratory system
T
N
O
117. I
Which of the following has no alternate host?
S
IS
(A) Taenia solium
M
D
M
(B) Ascaris lumbricoides
A
(C) Plasmodium vivax

N hepatica
(D) Fasiola
O
M

SA
M
CO (A) Insects
T (B) Crustaceans O
C T E
118. Lung books are the respiratory organs of

CU
T
(C) Archnids

N
(D) Peripatus

119. A
S IO
Auricularia is the larva of
2 0 19
(A)
(B)
(C)
(D)
U S
Echinoidea

C IS
Asterioda
Ophiuroidea
Holothuroidea T E ST
N
O
120.
M S I
In which of the following the heart is not ventral in position
IS
(A)
D Fish
M
(B) Frog
(C) Lamprey
A
(D) Crabs
N
O
121. Flying frog is M
M
(A)
(B)
Hyla
Pipa C O
(C)
(D)
Bufo
Rhacophorus AT
S
CU

122. The cells which secrete male sex hormone testosterone are

(A) isthmus 019
(B) crypt cells 2
(C) lieberkiihn
S T
E
(D) Leydig’s cells
T
N
O
123. I
Pulmonary artery originates from
S
IS
(A) right ventricle
M
D
M
(B) right auricle
A
(C) left auricle

N ventricle
(D) left
O
M

SA
T
O
M
124. Brunner’s
C (A) stomach
(B) ileum
O
C T E
gland is found in

CU
T
(C) duodenum

N
(D) rumen

125. A
S IO 2 0
The strongest ligament in the body is
19
(A)
(B)
(C)
(D)
U
C IS S
Inguinal ligament
Lacunar ligament
Ligamentum flavum
Iliofemoral ligamentT E ST
N
O
126.
M S I
The mean molecular weight of an amino acid in a typical globular protein is
IS
(A)
D 70
M
(B) 150
(C) 110
A
(D) 90
N
O
127. M
The maturation of anther and stigma at different times in the same flower is known as
M
(A)
(B)
Herkogamy
Cleistogamy C O
(C)
(D)
Chasmogamy
Dichogamy AT
S
CU

128. How many DNA molecules are present in the nucleus of human somatic cell in G2 stage
of cell cycle?
019
(A) 23 2
(B) 46
S T
E
(C) 69
(D) 92 T
N
O
I
129. The high solubility SofSamino acids in water is due to
I
M
D
(A) the presence

Mof side chain
A ion structure
(B) dipolar

N
(C) unipolarity
(D) O
M the hydrophilic nature of the amino group

SA
O
M
O E
130.C Human chorionic gonadotropin responsible for maintenance of pregnancy in women
T originates from
C T
CU (A) Ovary

AT N
(B) Pituitary
(C) Uterus
19
S IO 0
(D) Placental trophoblast
2
131.
U S ST
Which of the following has a quaternary structure?

C IS
(A) -chymotrypsin
T E
(B) Haemoglobin
N
O
M
(C) Insulin
(D) Myoglobin
S I
IS
132.
D M
Binding of oxygen to haemoglobin occurs when Fe is in the following oxidation state

A
(A)
(B)
(C)
+1
+2
+3
O
N
A
D
(D) +4
M
M
C O
AT
S
CU

133. Philadelphia chromosome is generated by translocation between

(A) Chromosome 18 and chromosome 6 019
(B) Chromosome 22 and chromosome 3 2
(C) T
Chromosome 22 and chromosome 9
S
E
(D) Chromosome 16 and chromosome 4
T
N
O
134. I
Pantothenic acid is a constituent of the coenzyme involved in
S
IS
(A) Decarboxylation
M
D
M
(B) Acetylation
A
(C) Dehydrogenation

N
(D) Reduction
O
M

SA
T
O
M
135. Chymotrypsin

O
C (A) Phenylalanine
(B) Alanine
C T E
in the small intestine hydrolyzes peptide linkage containing

CU
T
(C) Methionine

N
(D) Valine

136. A
S IO 2 0 19
How many meiotic divisions are required to produce 12 pollen grains in Cyperaceae?

(A)
(B)
(C)
(D)
U
C IS
2
3
6
12
S T E ST
N
O
137.
M S I
Glucose and galactose are two isomeric monosaccharides known as
IS
(A)
D Anomers
M
(B) Epimers
(C)
A
Enantiomers
(D)
N
Conformers

O
138. M
Mutations which do not cause any functional change in the protein are known as
M
(A)
(B)
Non-sense mutation
Missense mutation C O
(C)
(D) A
Silent mutation
T
Backward mutation

S
CU

139. In Guinea pig, black coat color is a dominant trait and white is recessive trait. A black

19
female in test crosses, produces six black offsprings. The probability that a heterozygous
0
2
black would do this by chance alone is approximately

(A) 50% S T
E
(B) 1%
(C) 25% T
N
(D) O
cannot be determined from the information

S I
140. The end productM
IS

M
of purine catabolism in normal humans is
D
(A) UreaA

N acid
(B) Uric
O
(C) Creatinine
M
M
O
(D) Xanthine

SA
CO
C T E
T The concentrations of sphingomyelins are increased in
141.

CU (A)
(B)
(C) T
Gaucher’s disease

A N
Fabry’s disease
Febrile disease
19
S IO 0
(D) Niemann-Pick disease
2
142.
U S ST
The only carbohydrate which is not having any chiral carbon atom is

C IS
(A) Glyceraldehyde
T E
(B) Erythrose
N
O
M
(C) Dihydroxyacetone
(D) Erythrulose
S I
IS
143.
D M
If the garden pea has 14 chromosomes in its diploid complement, how many double

A
(A)
(B)
6
16 O
D
trisomics could theoretically exist?

N
A
(C) 9
M
(D) 21
M
C O
AT
S
CU

144. Which of the following compounds does not act as secondary messenger during signaling
process?
019
(A) cAMP 2
(B) calcium ions
S T
E
(C) inositol 1,4,5-triphosphate
(D) Triacylglycerols T
N
O
S I
IS statements is not correct for an oncogene?
145. Which of the following
M cellular transformation
D
(A) They cause

M
(B) TheyAare often transduced by retroviruses

N
(C) Generally they are growth regulatory proteins
O
(D) They are always localized in the nucleus
M

SA T
O
M
O
C T
(A) Puromycin E
146.C Which of the following can serve as an inhibitor of electron transport?

CU
T
(B) Actinomycin

A N
(C) Malonate
(D) Cyanide
19
S IO 2 0
U S
147. Inhibition of photosynthesis in the presence of O2 in C3 plants is called

ST
C IS E
(A) Pasteur effect
(B) Warburg effect
T
(C) Decker effect
N
(D)
O
Hexose monophosphate shunt

M IS
S I
D
148. Which one among the following is the most important factor in speciation?
M
(A) Geographic isolation
(B)
A
Ethological isolation
(C)
N
Reproductive isolation
(D)
O
Ecological isolation

M
M is common in prokaryotic DNA binding
149. Which of the following structural motifs
proteins?
CO
(A) Homeodomain
(B) Helix-turn-helix A
T
(C) Helix-loop-helixS
(D) Leucine zipperU
C

150. Which one of the following viruses replicate in the cytoplasm?

(A) SV40 019
(B) Adenovirus 2
(C) Vaccinia virus
S T
E
(D) Herpex simplex virus
T
N
O
SI
IS
M
A
D
M
N
O
M

SAT
CO
M
O
C T E
CU
AT N 19
S IO 2 0
U
C IS S T E ST
N
O
M IS
S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

LIFE SCIENCE 9 - ANSWER KEY
1
20 CODE: 611
TEST
QN. NO. KEY QN. NO. KEY QN. NO. T KEY QN. NO. KEY QN. NO. KEY
E S

1 B 26 C 51 T A 76 A 101 B
2 A 27 A N
O52 D 77 C 102 B

3 C 28 D I
S 53 A 78 D 103 C
4 A 29 C IS 54 A 79 A 104 D
M
5 B 30 A AD 55
M C 80 B 105 B

6 B 31 BN 56 C 81 C 106 D
O
7 D 32 MC 57 C 82 A 107 A
8
9
10
A
C
D
33
34 T
S
35A
CO
M C
D
C
O
C TE
58
59
60
A
C
B
83
84
85
A
C
D
108
109
110
B
D
A
11
12
C
B
U
C 36
37
B
C
AT N
61
62
C
B
86
87
19
B
A
111
112
D
A
13 C 38 A
S I O 63 B 88
2 0 A 113 C

U S
14 C 39 A 64 D 89 B 114 A
15 A 40 B 65 B ST 90 C 115 D
16
17
D
C
41
42 C IS
A
B
66
67
O
B
N
B
T E 91
92
C
D
116
117
B
B
18 B 43
M
B 68
IS
S I C 93 C 118 C

D
19 A 44 C 69 B 94 C 119 D
20 B 45 A 70 M A 95 A 120 D
21
22
23
A
A
B
46
47
48
A C
A
D O
N
A
71
72
73
D C
A
A
96
97
98
A
A
A
121
122
123
D
D
A
M
24 B 49 A 74
M B 99 B 124 C

CO
25 B 50 A 75 B 100 D 125 D

AT
S
CU

019
2
QN. NO. KEY
S T
TE
126 C
127 D N
O
128 D SI
129 B IS
M
130 D A
D
M
131 B N
O
132 B M
133
134
135
C
B
A SA
T
CO
M
O
C TE
136
137
D
B
CU
AT N 19
138 D
S I O 2 0
U S
139 A
140 B ST
141
142
D
C C IS O
N
T E
143 D
M IS
S I
D
144 D
145 D M
146
147
148
D
B
C
A O
N
A
D

M
149 B
M
CO
150 C

AT
S
CU