1. Which among the following is an example for cytokinin ?
(A) Phenylacetic acid
(B) Phosphon D
(C) Dihydrozeatin
(D) 2-methoxy-3, 6-dichlorobenzoic acid
2. The active site of Rubisco contains _____ ion.
(A) Magnesium (B) Potassium (C) Copper (D) Zinc
3. Which is the oldest carbon-14 dated seed that has grown
into viable plant ?
(A) Nelumbo nucifera (B) Archaefructus liaoningensis
(C) Michelia champaka (D) Silene stenophylla.
4. C-4 epimer of D-glucose is _____
(A) Mannose (B) Arabinose (C) Allose (D) Galactose
5. Match the following correctly :
Set – A Set – B
(a) non-polar aminoacid i. lysine
(b) aromatic aminoacid ii. proline
(c) positively charged aminoacid iii. cysteine
(d) polar aminoacid iv. tryptophan
(A) a-ii, b-iv, c-i, d-iii (B) a-iii,b-i,c-iv, d-ii
(C) a-ii; b-iv, c-iii, d-i (D) a-iv, b-iii, c-ii, d-i.
6. Which among the following is a molybdenum requiring
enzyme ?
(A) Urease (B) Cytochrome oxidase
(C) Dinitrogenase (D) Pyruvate kinase
7. Which among the following is used for polymerization
agent in PAGE ?
(A) Ammonium persulfate (B) Sodium dodycel supfate
(C) Mercaptoethanol (D) Sodium hydroxide
8. Smallest genome size is seen in _____
(A) E. coll (B) Helicobater pylori
(C) Carsonella ruddii (D) Saccharomyces cerevisiae
9. Which human chromosome has the highest number of genes ?
(A) X chromosome (B) Y chromosome
(C) Chromosome 1 (D) Chromosome 8
10. A human with a karyotype of 48, XXXY is an example for
_____
(A) Turner’s syndrome (B) Klinefelter’s syndrome
(C) Down’s syndrome (D) Triplo X
11. Match the following correctly :
Set – A Set – B
(a) Fumonisin i. Aspergillus falvus
(b) Aflatoxin ii. Claviceps purpurea
(c) Ergot toxin iii Amanita phalloides
(d) Mushroom toxin iv. Fusarium verticillioides
(A) a-ii, b-iv, c-i, d-iii (B) a-iv,b-i,c-ii, d-iii
(C) a-ii, b-iv, c-iii, d-i (D) a-iv, b-iii, c-ii, d-i.
12. Pick out the wrong statement.
(A) Clamp connections are seen in Basidiomycota
(B) Dolipore septum is present in Basidiomycota
(C) Fairy rings are formed by Agaricus
(D) Genus Pilobolus belongs to Asomycota
13. Find out the correct statement about lichens.
(A) Cladonia is an example for foliose lichen
(B) Isidia is an asexual reproductive structure
(C) Soredia are sexual reproductive structures
(D) Cyanophycophilous lichen has green algae as phycobiont
14. Which among the following satements is correct about
algae ?
(A) Branched filaments are seen in Zygnema
(B) Oedogonia thallus is branched
(C) Branched thallus is present in Cladophora
(D) Thallus is branched in Ulothrix.
15. Match the following.
Set – A Set – B
(a) Hormogonia i. Polysiphonia
(b) Amylum stars ii. Lyngbya
(c) Tetraspores iii. Vaucheria
(d) Synzoospore iv. Chara
(A) a-ii, b-iii, c-i, d-iv (B) a-ii,b-iv,c-i, d-iii
(C) a-ii, b-iv, c-iii, d-i (D) a-iv, b-iii; c-i, d-ii.
16. Heterospory is present in _____
(A) Isoetus (B) Azolla
(C) Selaginella (D) All the above
17. Which among the following is the commonly cultivated
‘Maidenhair fern’ ?
(A) Adiantum (B) Pteridium
(C) Gleichenia (D) Equisetum
18. Which among the following produces lnterferon- (IFN-)
?
(A) Leucocytes (B) Sensitized T cells
(C) Fibroblasts (D) Natural killer cells
19. Polyembrony is found in
(A) Citrus (B) Maize
(C) Kiwi (D) All the above
20. Which among the following is an example for crop species
introduced in India ?
(A) Cabbage (B) Cauliflower
(C) Hevea brasiliensis (D) All the above.
21. Pick out the wrong statement :
(A) Selfing reduces homozygosity
(B) Inbreeding depression is absent on self pollinated crops
(C) Heterosis is the superiority of F1 hybrids over both of
its parents
(D) Selfing decreases heterozygosity
22. The new plant species from West Bengal named after
former President of India Dr APJ
Abdul Kalam belongs to the genera _____
(A) Oryza (B) Drypetes
(C) Santalam (D) Eriocaulon
23. Which among the following is not related with family
Orchidaceae ?
(A) Resupination (B) Follicle
(C) Pollinium (D) Rostellum
24. Which Indian state has got highest area under mangrove
forest ?
(A) West Bengal (B) Kerala
(C) Gujarat (D) Tamil Nadu
25. The height in cm of 11 plants are given below. Which is
the median height ?
16, 17, 10, 14, 20, 8, 22, 31, 5, 10, 13.
(A) 10 (B) 15
(C) 14 (D) 17
26. Covid-19 genome is _____
(A) Single stranded DNA (B) Single stranded RNA
(C) Double stranded RNA (D) Double stranded DNA
27. Match the following :
Set – A Set – B
(a) Western blotting i. DNA
(b) Southern blotting ii. Protein
(c) Northern blotting iii. PCR
(d) Taq polymerase iv. RNA
(A) a-ii, b-i, c-iv, d-iii (B) a-ii, b-iv, c-iii, d-i
(C) a-ii, b-iv, c-i, d-iii (D) a-iv, b-iii, c-i, d-ii
28. Which among the following points is not correct about
bryophytes ?
(A) Air chambers and air pores are absent in Anthocerotopsida
(B) The archesporium is endothecial in origin in
Hepaticopsida
(C) Sporogenous tissue is amphithecial in origin in
Anthocerotopsida
(D) Oblique septa is absent in the rhizoids of bryopsida
29. Which of the following families have anomocytic type of
stomata ?
(A) Rubiaceae (B) Cruciferae
(C) Ranunculaceae (D) Caryophyllaceae
30. Find out the neutral stain.
(A) Safranin (B) Giemsa stain
(C) Methyl blue (D) Ferric sulphate
31. Find out the wrong statement about geological time scale
from the following :
(A) Holocene epoch belongs to Quaternary period
(B) Cretaceous period belongs to Mesozoic era
(C) Devonian period belongs to Palaeozoic era
(D) Silurian period is belongs to Mesozoic era
32. Find out the correct answer related with Trichopus
zeylanicus from the following statements :
i. It has anti-fatique property
ii. Fruits and leaves are used
iii. It belongs to Dioscoreaceae family
iv. It is used by Kani tribes of Western Ghats.
(A) Only i & iv correct. (B) i, ii, iii & iv correct
(C) i, iii & iv only correct (D) ii & iv only
correct
33. Which among the following is not the main goal of the
Convention on Biological
Diversity (CBD) ?
(A) Eliminating hunger and improving nutrition and standards
of living by
increasing agricultural productivity.
(B) Share any benefits from genetic diversity equally
(C) Use of diversity without destroying it
(D) To protect biodiversity
34. Match the following :
Set – A Set – B
(a) Chilgoza i. Tumboa
(b) Sagopalm ii. Pinus gerardiana
(c) Maidenhairtree iii Cycas revoluta
(d) Welwitschia iv. Ginkgo biloba
(A) a-iv, b-iii, c-ii, d-i (B) a-iv, b-iii, c-i, d-ii
(C) a-ii,b-iii,c-iv; d-i (D) a-iii, b-i; c-iv, d-ii
35. Which bacteria produce the antibiotic Chloramphenicol ?
(A) Streptomyces venezuelae (B) Streptomyces fradiae
(C) Streptomyces rimosus (D) Pencillium sp.
36. Which among the following is the binomial for black gram
?
(A) Vigna radiata (B) Vigna unguiculata
(C) Vigna mungo (D) Cajanus cajan
37. Perianth in Poaceae is represented by
(A) Lema (B) Lodicules
(C) Palea (D) glume
38. DNA topoisomerase V is reported in
(A) Bacillus subtilis (B) Methanopyrus kandleri
(C) Thiobacillus denitrificans (D) Micrococcus luteus
39. Which among the following is a stop codon in vertebrate
mitochondrial DNA ?
(A) UUU (B) AGA
(C) UGA (D) GUC
40. Find out the advantage of haploids from the following.
(A) High vigour (B) Mutations can be easily detected
(C) Sterility (D) Expression of dominant alleles
41. Choose the name of chemicals used in somatic
hybridization technique.
(A) PEG (B) Hemicellulase
(C) Sorbitol (D) All the above
42. Who among the following coined the term bioinformatics ?
(A) Younan Nowzardan (B) Pauline Hogeweg
(C) David J Lipman (D) M Gromiha
43. Which among the following is a nucleotide data base ?
(A) DDBJ (B) PDB
(C) BLAST (D) Pylip
44. In which plant corm is present ?
(A) Sweet potato (B) Cassava
(C) Coleus (D) Gladiolus
45. The grass species Agrostis tenuis is an example for
_____ speciation.
(A) Sympatric speciation (B) Allopatric speciation
(C) Parapatric speciation (D) Peripatric speciation
46. Choose a stenopalynous plant family from the following :
(A) Graminieae (B) Verbenaceae
(C) Rubiaceae (D) Asteraceae
47. Black dammer is obtained from
(A) Vateria indica (B) Pterocarpus marsupium
(C) Pterocarpus santalinus (D) Canarium strictum
48. The chromosomes are arranged at the metaphase plate by a
process called-
(A) Congression (B) Centromere splitting
(C) Microtubule pulling (D) Microtubule pushing
49. Which among the following is a microfilament ?
(A) Acidic keratins (B) Desmin
(C) Vimentin (D) Actin
50. What is the causative organism for soft rot of ginger ?
(A) Phytophthora capsici (B) Hemileia vastatrix
(C) Pythium aphanidermatum (D) Phytophthora palmivora
51. Which of the following hormones affect Na+, Cl–, Ca2+
and water reabsorption and K+
secretion by renal tubules ?
(i) Angiotensin II
(ii) Aldosterone
(iii) ADH
(iv) Atrial natriuretic peptide
(v) Thyroid hormone
(vi) Parathyroid hormone
(A) (ii), (iii), (iv), (v) & (vi) (B) (i), (ii), (iii),
(iv) & (vi)
(C) (i), (ii), (iii), (v) & (vi) (D) (i), (iii), (iv),
(v) & (vi)
52. Aminoacyl tRNAs are escorted to the ribosome by the
elongation factor
(A) EF – Tu (B) eEF-2
(C) EF-Ts (D) EF-G
53. A set of statistical methods (Column A) and their
applications (Column B) in a random
manner are given below :
Column – A Column – B
1. Variance a. Measures strength of association between two variables
2. Correlation coefficient b. Prediction of value of a dependent variable based on known value of an associated variable
3. Regression analysis c. Calculation of deviation between observed & expected values
4. Chi-square analysis d. Calculate the spread of
distribution
(A) 1-b; 2-d; 3-a; 4-c (B) 1-c; 2-b; 3-d; 4-a
(C) 1-d; 2-a; 3-b; 4-c (D) 1-a; 2-c; 3-b; 4-d
54.Which of the following is the correct definition for the character evolution patterns
shown above ?
(A) (i) – Autapomorphy ; (ii) – Synepomorphy ; (iii) –
Homoplasy
(B) (i) – Autapomorphy ; (ii) – Homoplasy ; (iii) –
Synepomorphy
(C) (i) – Synepomorphy ; (ii) – Autapomorphy ; (iii) –
Homoplasy
(D) (i) – Synepomorphy ; (ii) – Homoplasy ; (iii) –
Autapomorphy
55. Which of the following events will NOT lead to
transformation of a normal cell into a
cancer cell ?
(A) Gain of function of oncogenes
(B) Loss of function of tumor suppressors
(C) Gain of function of genes involved in nucleotide
excision repair
(D) Loss of function of pro-apoptosis related genes
56. What can be the impact of excessive use of nitrogenous
fertilizers in agriculture ?
(i) Proliferation of nitrogen fixing microorganism in soil
can occur
(ii) Increase in the acidity of soil can occur
(iii) Leaching of nitrate to the ground water can occur
Select the correct one.
(A) (i) & (iii) only (B) (ii) only
(C) (ii) & (iii) only (D) (i), (ii) & (iii)
57. Which of the following is NOT a chromosomal anomaly ?
(A) Cri du Chat syndrome (B) Jacob’s syndrome
(C) Proteus syndrome (D) Patau syndrome
58. Baula project is meant for
(A) Turtles (B) Snow leopard
(C) Lion (D) Crocodiles
59. Which one of the following does NOT contribute to
micro-evolutionary change ?
(A) Natural selection (B) Random mating
(C) Genetic drift (D) Mutation
60. Choose the agent that can cause relaxation of mesangial
cells.
(A) Dopamine (B) Histamine
(C) Thrombaxane A2 (D) Norepinephrine
61. Which one of the following does not belong to human
antimicrobial proteins and
Peptides at epithelial surfaces forming part of innate
immunity ?
(A) Lactoferrin (B) Defensin
(C) Calprotectin (D) Vimentin
62. Alveolar cells of the lung derived from
(A) Ectoderm (B) Mesoderm
(C) Endoderm (D) Both Ectoderm & Mesoderm
63. Entry of enveloped viruses into host cells is mediated
by
(A) Only endocytosis
(B) Only periocytosis
(C) Both endocytosis and membrane fusion
(D) Both endocytosis and phagocytosis
64. Which one of the following is NOT true for cholesterol
metabolism ?
(A) Biosynthesis takes place in the cytoplasm.
(B) HMG-CoA reductase is the key regulator of cholesterol
biosynthesis.
(C) Reduction reactions use NADH as cofactor.
(D) Cholesterol is transported by LDL in plasma.
65. If a cell has committed to a particular fate, during
development, it is said to be
(A) Differentiated (B) Tolipotent
(C) Pluripotent (D) Determined
66. Lacewings belong to which insect order ?
(A) Diploptera (B) Neuroptera
(C) Megaloptera (D) Coleoptera
67. Which gas does NOT contribute to global warming through
its greenhouse effect ?
(A) Nitrous oxide (B) Methane
(C) Carbon dioxide (D) Nitric oxide
68. Lectotype is
(A) Duplicate of holotype
(B) Specimen selected from original material for
nomenclature type where there
is no holotype
(C) Specimen described along with holotype
(D) Specimen cited by author making one holotype
69. Which of the following geological period is known as the
“Age of Amphibians” ?
(A) Carboniferous (B) Devonian
(C) Ordovician (D) Cretaceous
70. Which of the following is NOT a second messenger ?
(A) Cyclic GMP (B) Diacylglycerol
(C) Inositol triphosphate (D) Phosphetidyl inositol
71. Which of the following statements is true ?
(A) Trademark registrations can be renewed for an unlimited
number of 10 years.
(B) Trademark law is intended to protect the owner’s
original work.
(C) Surnames alone can be trademarked.
(D) To qualify for federal protection, a mark must be
distinctive and have a
“secondary meaning”.
72. What is the effect produced when a bee carries pollen
from one population to another ?
(A) Assortative mating (B) Gene flow
(C) Founder effect (D) Diversifying selection
73. GFP protein was originally isolated from
(A) Drosophila melanogaster (B) Carnorhabditis elegans
(C) Arabidopsis thaliana (D) Aequoria victoria
74. The S wave of normal human ECG originates due to the
(A) Left to right septal depolarization
(B) Reprolanzation of atrium
(C) Septal and left ventricular depolarization
(D) Late depolarization of the ventricular walls moving back
toward the AV
junction
75. Two siblings who inherit 50% of the genome from the
mother and 50% from the father
show lots of phenotypic differences. Which one of the
following events during
gametogenesis of the parents will maximally contribute to
this difference ?
(A) Mutation (B) Independent assortment
(C) Recombination (D) Environment
76. Nick translation is done by
(A) DNA polymerase I (B) Kinase
(C) DNA ligase (D) DNA polymerase II
77. The philadelphia chromosome
(A) An example of gene amplification
(B) A product of a reciprocal translocation
(C) Causes retinoblastoma
(D) Causes Burkitt’s lymphoma
78. Which of the following is true regarding Anthrax ?
(A) Anthrax is highly contagious
(B) Anthrax is caused by a virus
(C) Inhalation anthrax requires infection with a large
number of spores
(D) Inhalation anthrax and cutaneous anthrax are caused by
separate strains of
Bacillus anthracis
79. Capacilation of sperms in humans
(A) Takes place in the ampulla of the oviduct
(B) Occurs during copulation
(C) Occurs after the acrosome reaction
(D) Takes place in the epididymis of testis
80. Which one of the following technique is generally used
to produce transgenic animals ?
(A) Entire foreign nucleus is introduced in exnucleated unfertilized
egg.
(B) Desired DNA is microinjected into fertilized eggs
followed by implantation
of embryo in a foster mother
(C) Processed mRNA containing only exones are introduced
into blastocyst stage
embryo.
(D) cDNA of desired gene is introduced into animal embryos
and implanted in a
foster mother
81. Tautonym is a taxonomic designation used for animals
referring to
(A) Same name for genes and species
(B) The name of the author for the species
(C) Same name for species and sub-species
(D) Trinomial nomenclature
82. Which of the following programs is used to conserve a
species facing extinction ?
(A) Sustainable use (B) Edge effects
(C) Natural resources (D) Captive breeding
83. Cladistic classification is based on
(A) Sequential order in which branches arise from a
phylogenetic tree
(B) Cellular organization and cytoskeleton
(C) Morphological features and skeleton of individuals
(D) The order of sequence divergence
84. Which is the correct chronological order among the
following events in the history of
life ?
(i) Prokaryotic cell
(ii) Eukaryotic cell
(iii) Natural selection
(iv) Organic molecules
(v) Self replicating molecules
(A) (iv), (v), (iii), (i), (ii) (B) (iv), (v), (i), (ii),
(iii)
(C) (v), (iv), (i), (iii), (ii) (D) (iv), (v), (i), (iii),
(ii)
85. A person suffering from thyrotoxicosis has extremely
high level of thyroid hormone in
blood. There is a failure of feedback regulation
hypothelemic-pituitary-thyroid exist. The
detailed blood investigation exhibited high level of the
following :
(i) Thyroid Stimulating Hormone
(ii) Thyroid Stimulating Immunoglobulin
(iii) Thyrotropin Releasing Hormone
(iv) Parathyroid Hormone
Which one of the following is the reason for such
thyrotoxicosis ?
(A) (i) only (B) (ii) only
(C) (i) & (iii) (D) (iii) & (iv)
86. Human serum immunoglobulin takes part in classical
complement fixation pathway is
(A) IgD (B) IgE
(C) IgA (D) IgG
87. The following are the statements regarding the
development and maintenance of anterior
and posterior compartments in each segment of Drosophila :
(i) Expression of wingless and engrailed is activated by
pair-rule genes.
(ii) Continued expression of wingless and engrailed is
maintained by interaction
between the cells expressing Engrailed and Wingless proteins
(iii) Hedgehog is expressed in wingless expressing cells and
forms short range
gradient
(iv) Hedgehog is a transcription factor
(v) Engrailed is a secretory factor and binds with the
patched receptor of the
wingless expressing cells.
Which of the following combinations of above statements is
correct ?
(A) (iii) & (v) (B) (iii), (iv) & (v)
(C) (iv) & (v) (D) (i) & (ii)
88. Some Drosophila larvae are exposed to 37 C during their
growth. One of the adult flies
first emerged had a crossveinless phenotype. Crossveinless
is a known mutant in
Drosophila. When this crossveinless fly was crossed to a
known crossveinless mutant fly,
all the progeny had a normal phenotype. The observed
phenotype is an example of :
(A) Phenocopy (B) Pleiotropy
(C) Penetrance (D) Conditional mutant
89. The International treaty adopted to regulate the
production and use of chemicals that
contribute to the depletion of Earth’s ozone layer is known
as :
(A) Rio de Janeiro Conference (B) Montreal Protocol
(C) The Vienna Convention (D) The Kyoto Protocol
90. G. Protein Coupled Receptors (GPCRs) are used to detect
and respond in many different
types of signals and function as molecular switches.
Regarding GPCR which one of the following statements is
INCORRECT ?
(A) The ‘on’ form gets bound to & subunits and
activates a membrane bound
effects like adenylyl cyclase, phospholipase C or ion
channel.
(B) GPCRs are coupled to trimeric G proteins comprising
three subunits , & .
(C) The subunit is a GTPase switch protein that alternates
between an active
(on) state with bound GTP and an inactive (off) state with
GDP.
(D) GPCRs with a common structure of seven membrane spanning
helices.
91. Following are the key points about the effect of genetic
drift :
(i) Genetic drift can cause allele frequencies to change in
a pre-directed way.
(ii) Genetic drift is significant in small populations
(iii) Genetic drift can lead to a loss of genetic variation
within populations
(iv) Genetic drift can cause harmful alleles to become
fixed.
Which one of the following combinations are true ?
(A) (i) & (ii) only (B) (ii) & (iii) only
(C) (i), (ii) & (iii) (D) (ii), (iii) & (iv)
92. Which of the following is a sequence alignment tool ?
(A) BLAST (B) PROSITE
(C) PIR (D) PRINTS
93. What is the function of w subunit of RNA polymerase ?
(A) Cation binding (B) Promoter binding
(C) Initiation and elongation (D) Subunit association
94. Which one of the following statement is INCORECT
regarding the classification of stains ?
(A) Bismark brown is a basic stains
(B) Janus green B and Methylene blue are examples of neutral
stains
(C) Eosin is an acidic stain
(D) Neutral red and Janus green are vital stains
95. In eukaryotic cell division, metaphase to anaphase
transition is regulated by degradation
of
(A) Aurora A Kinase (B) Cyclin B1
(C) CDK1 (D) Polo-like Kinase
96. Which of the following statements is INCORRECT in the
context of diversity patterns of
a species ?
(A) Alpha diversity is diversity within a single community
(B) Beta diversity is a measure of the change in species
composition from one
community or habitat to another
(C) Alpha diversity is the regional diversity found among
range of communities
in a geographical region
(D) Gamma diversity is the regional diversity found among
range of
communities / habitats in a geographical region
97. Which of the following bacteria has subcellular
localization in lysosomes ?
(A) Salmonella typhi (B) Sheplococcus pneumoniae
(C) Vibrio cholerae (D) Mycobacterium tuberculosis
98. The presence & distribution of specific mRNAs within
a cell can be detected by
(A) Northern blot analysis (B) In situ hybridization
(C) Real time PCR (D) ELISA
99. The “Red Queen Hypothesis” is related to
(A) The evolutionary arms race between the host and
parasite.
(B) The mating order in the harem of a polyganous male
(C) The elimination by deleterious mutations by sexual
reproduction
(D) Mate selectin process by a female in a lek
100. Production of excessive amount of corticotropin (ACTH)
occur in which of the following
diseases ?
(A) Greve’s disease (B) Greig’s syndrome
(C) Cushing’s syndrome (D) Alport syndrome
Scientific Officer Biology (Forensic ) Questions and Answers