| Post Name | SCIENTIFIC OFFICER (BIOLOGY) -KERALA POLICE SERVICE (FSL) |
|---|---|
| Question Paper Code | 018/2021 |
| Category Code | 025/2020 |
| Date of Test | 25 January 2021 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Which among the following is an example for cytokinin ?
Answer
C. Dihydrozeatin
2
The active site of Rubisco contains _____ ion.
Answer
A. Magnesium
3
Which is the oldest carbon-14 dated seed that has grown into viable plant ?
Answer
D. Silene stenophylla.
4
Chi-square analysis d. Calculate the spread of distribution
Answer
D. 1-a; 2-c; 3-b; 4-d
5
Match the following correctly :
Set – A Set – B
Answer
A. non-polar aminoacid i. lysine
6
Which among the following is a molybdenum requiring enzyme ?
Answer
C. Dinitrogenase
7
Which among the following is used for polymerization agent in PAGE ?
Answer
A. Ammonium persulfate
8
Smallest genome size is seen in _____
Answer
C. Carsonella ruddii
9
Which human chromosome has the highest number of genes ?
Answer
C. Chromosome 1
10
A human with a karyotype of 48, XXXY is an example for _____
Answer
B. Klinefelter’s syndrome
11
Match the following correctly :
Set – A Set – B
Answer
B. Aflatoxin ii. Claviceps purpurea
12
Pick out the wrong statement.
Answer
D. Genus Pilobolus belongs to Asomycota
13
Find out the correct statement about lichens.
Answer
B. Isidia is an asexual reproductive structure
14
Which among the following satements is correct about algae ?
Answer
C. Branched thallus is present in Cladophora
15
Match the following.
Set – A Set – B
Answer
B. Amylum stars ii. Lyngbya
16
Heterospory is present in _____
Answer
D. All the above
17
Which among the following is the commonly cultivated ‘Maidenhair fern’ ?
Answer
A. Adiantum
18
Which among the following produces lnterferon- (IFN-) ?
Answer
C. Fibroblasts
19
Polyembrony is found in
Answer
D. All the above
20
Which among the following is an example for crop species introduced in India ?
Answer
D. All the above.
21
Pick out the wrong statement :
Answer
A. Selfing reduces homozygosity
22
The new plant species from West Bengal named after former President of India Dr APJ
Abdul Kalam belongs to the genera _____
Answer
B. Drypetes
23
Which among the following is not related with family Orchidaceae ?
Answer
B. Follicle
24
Which Indian state has got highest area under mangrove forest ?
Answer
A. West Bengal
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.
Answer
C. 14
26
Covid-19 genome is _____
Answer
B. Single stranded RNA
27
Match the following :
Set – A Set – B
Answer
A. Western blotting i. DNA
28
Which among the following points is not correct about bryophytes ?
Answer
D. Oblique septa is absent in the rhizoids of bryopsida
A 5 018/2021
29
Which of the following families have anomocytic type of stomata ?
Answer
C. Ranunculaceae
30
Find out the neutral stain.
Answer
B. Giemsa stain
31
Find out the wrong statement about geological time scale from the following :
Answer
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.
Answer
B. i, ii, iii & iv correct
33
Which among the following is not the main goal of the Convention on Biological
Diversity
Answer
A. Eliminating hunger and improving nutrition and standards of living by
increasing agricultural productivity.
34
Match the following :
Set – A Set – B
Answer
C. Maidenhairtree iii Cycas revoluta
35
Which bacteria produce the antibiotic Chloramphenicol ?
Answer
A. Streptomyces venezuelae
36
Which among the following is the binomial for black gram ?
Answer
C. Vigna mungo
37
Perianth in Poaceae is represented by
Answer
B. Lodicules
38
DNA topoisomerase V is reported in
Answer
B. Methanopyrus kandleri
39
Which among the following is a stop codon in vertebrate mitochondrial DNA ?
Answer
B. AGA
40
Find out the advantage of haploids from the following.
Answer
B. Mutations can be easily detected
41
Choose the name of chemicals used in somatic hybridization technique.
Answer
D. All the above
42
Who among the following coined the term bioinformatics ?
Answer
B. Pauline Hogeweg
43
Which among the following is a nucleotide data base ?
Answer
A. DDBJ
44
In which plant corm is present ?
Answer
D. Gladiolus
45
The grass species Agrostis tenuis is an example for _____ speciation.
Answer
C. Parapatric speciation
46
Choose a stenopalynous plant family from the following :
Answer
A. Graminieae
47
Black dammer is obtained from
Answer
D. Canarium strictum
48
The chromosomes are arranged at the metaphase plate by a process called-
Answer
A. Congression
49
Which among the following is a microfilament ?
Answer
D. Actin
50
What is the causative organism for soft rot of ginger ?
Answer
C. Pythium aphanidermatum
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
Answer
Question Cancelled
52
Aminoacyl tRNAs are escorted to the ribosome by the elongation factor
Answer
A. EF – Tu
53
A set of statistical methods
Answer
C. olumn
54
Which of the following is the correct definition for the character evolution patterns
shown above ?
Answer
D. (i) – Synepomorphy ; (ii) – Homoplasy ; (iii) – Autapomorphy
018/2021 8 A
55
Which of the following events will NOT lead to transformation of a normal cell into a
cancer cell ?
Answer
C. Gain of function of genes involved in nucleotide excision repair
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.
Answer
C. (ii) & (iii) only
57
Which of the following is NOT a chromosomal anomaly ?
Answer
C. Proteus syndrome
58
Baula project is meant for
Answer
D. Crocodiles
59
Which one of the following does NOT contribute to micro-evolutionary change ?
Answer
B. Random mating
60
Choose the agent that can cause relaxation of mesangial cells.
Answer
A. Dopamine
61
Which one of the following does not belong to human antimicrobial proteins and
Peptides at epithelial surfaces forming part of innate immunity ?
Answer
D. Vimentin
62
Alveolar cells of the lung derived from
Answer
C. Endoderm
63
Entry of enveloped viruses into host cells is mediated by
Answer
C. Both endocytosis and membrane fusion
64
Which one of the following is NOT true for cholesterol metabolism ?
Answer
C. Reduction reactions use NADH as cofactor.
65
If a cell has committed to a particular fate, during development, it is said to be
Answer
D. Determined
66
Lacewings belong to which insect order ?
Answer
B. Neuroptera
67
Which gas does NOT contribute to global warming through its greenhouse effect ?
Answer
D. Nitric oxide
68
Lectotype is
Answer
B. Specimen selected from original material for nomenclature type where there
is no holotype
69
Which of the following geological period is known as the “Age of Amphibians” ?
Answer
A. Carboniferous
70
Which of the following is NOT a second messenger ?
Answer
D. Phosphetidyl inositol
71
Which of the following statements is true ?
Answer
A. Trademark registrations can be renewed for an unlimited number of 10 years.
72
What is the effect produced when a bee carries pollen from one population to another ?
Answer
B. Gene flow
73
GFP protein was originally isolated from
Answer
D. Aequoria victoria
018/2021 10 A
74
The S wave of normal human ECG originates due to the
Answer
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 ?
Answer
B. Independent assortment
76
Nick translation is done by
Answer
A. DNA polymerase I
77
The philadelphia chromosome
Answer
B. A product of a reciprocal translocation
78
Which of the following is true regarding Anthrax ?
Answer
C. Inhalation anthrax requires infection with a large number of spores
79
Capacilation of sperms in humans
Answer
A. Takes place in the ampulla of the oviduct
80
Which one of the following technique is generally used to produce transgenic animals ?
Answer
B. Desired DNA is microinjected into fertilized eggs followed by implantation
of embryo in a foster mother
81
Tautonym is a taxonomic designation used for animals referring to
Answer
A. Same name for genes and species
82
Which of the following programs is used to conserve a species facing extinction ?
Answer
D. Captive breeding
83
Cladistic classification is based on
Answer
A. Sequential order in which branches arise from a phylogenetic tree
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
Answer
A. (iv), (v), (iii), (i), (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 ?
Answer
B. (ii) only
86
Human serum immunoglobulin takes part in classical complement fixation pathway is
Answer
D. IgG
018/2021 12 A
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 ?
Answer
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 :
Answer
A. Phenocopy
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 :
Answer
B. Montreal 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 ?
Answer
A. The ‘on’ form gets bound to & subunits and activates a membrane bound
effects like adenylyl cyclase, phospholipase C or ion channel.
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 ?
Answer
D. (ii), (iii) & (iv)
92
Which of the following is a sequence alignment tool ?
Answer
A. BLAST
93
What is the function of w subunit of RNA polymerase ?
Answer
D. Subunit association
94
Which one of the following statement is INCORECT regarding the classification of stains ?
Answer
Question Cancelled
95
In eukaryotic cell division, metaphase to anaphase transition is regulated by degradation
of
Answer
B. Cyclin B1
96
Which of the following statements is INCORRECT in the context of diversity patterns of
a species ?
Answer
C. Alpha diversity is the regional diversity found among range of communities
in a geographical region
97
Which of the following bacteria has subcellular localization in lysosomes ?
Answer
D. Mycobacterium tuberculosis
98
The presence & distribution of specific mRNAs within a cell can be detected by
Answer
B. In situ hybridization
99
The “Red Queen Hypothesis” is related to
Answer
A. The evolutionary arms race between the host and parasite.
100
Production of excessive amount of corticotropin
Answer
C. Cushing’s syndrome
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