| Post Name | Scientific Officer Biology (SR for SC/ST and ST only) |
|---|---|
| Department | Kerala Police Service Forensic Science Laboratory Category No : 113/2022 |
| Question Paper Code | 094/2022/OL |
| Category Code | 113/2022 |
| Date of Test | 1 December 2022 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
Agar-agar is found in which part of the algal cell?
Answer
B. Cell Wall
2
'Red Snow' is a phenomenon caused by Chlamydomonas nivalis is due to the presence of the pigment
Answer
D. Astaxanthin
3
'Spawn' in mushroom cultivation is the mixture of sterilized grain with
Answer
C. Mycellium
4
Lichens reproduce by
Answer
A. Soredium
5
The name 'Bordeaux' in Bordeaux mixture came from
Answer
D. A place
6
The bio fungicide Trichoderma Viride is belonging to the major group
Answer
B. Fungi
7
Which one of the following is a fossil Bryophyte?
Answer
C. Niadita
8
Bryophytes are said to be the 'amphibians of the plant kingdom' because
Answer
B. Water is essential to do fertilization
9
Vascular bundles are found scattered in the ground tissue is called
Answer
A. Atacostele
10
Find out the xerophytic species of Selaginella from the following
Answer
D. All of the above
11
Which of the following statement is correct with regard to Cycas?
Answer
D. All of the above
12
In Gymnosperms, the endosperm is
Answer
A. Haploid
13
Generally, antibiotics are not effective for viral disease because
Answer
A. Viruses are without cell wall
14
Birbal Sahni Institute of Palaeosciences is located at
Answer
C. Lucknow
15
A Jurassic angiosperm fossil found by the Indian Palaeobotanist Birbal Sahni is
Answer
A. Homoxylon
16
Passage cells are found in
Answer
C. Endodermis
17
Which tissue of Corchorus Capsularis is Jute Fibre?
Answer
B. Phloem fibre
18
Which one of the following is a coal tar dye?
Answer
D. Erythrosine
19
Phase contrast microscope was invented by
Answer
C. Frits Zernike
20
What is amphimixis?
Answer
A. Normal act of sexual reproduction
21
Male gametophyte in Angiosperm is
Answer
B. Pollen grain
22
Acetolysis of pollen grain is
Answer
C. Treating with a mixture of concentrated sulfuric acid and acetic anhydride
23
Sporopollenin is composed of
Answer
D. All of the above
24
Which Travancore Maharaja introduced tapioca in Kerala?
Answer
A. Sree. Vysakham Tirunal
25
Which of the following statement is correct with regard to selection method in plant breeding?
Answer
C. Both 1 and 2 are correct
26
Random fluctuations in the numbers of gene variants in a population is called
Answer
C. Genetic drift
27
"Ontogeny repeats phylogeny". This theory is known as
Answer
D. Recapitulation Theory
28
A specimen selected to serve as a substitute for the holotype when all material on which the name of the taxon was based, is missing is called
Answer
C. Neotype
29
Gynostemium is present in the family
Answer
B. Orchidaceae
30
Polyadelphous stamens are found in
Answer
C. Both 1 and 2
31
Morphology of the edible fleshy portion of Jack fruit is
Answer
B. Perianth
32
A coffee substitute and food additive 'Chicory' (Cichorium intybus) belonging to the family
Answer
B. Asteraceae
33
Which of the following statement is/are correct about spices and condiments? (i) A condiment is a spice or preparation that is added to food. (ii) A spice is a plant substance primarily used for flavouring or colouring food. (iii) A condiment is added to food, typically after cooking, to impart a specific flavour
Answer
D. All of the above ((i) (ii) and (iii))
34
The largest sacred grove in Kerala State is
Answer
C. Iringol Kavu
35
What is the botanical name of 'Kallur Vanchi' which is a famous herb traditionally used in kerala for the treatment of kidney/bladder stone?
Answer
D. Rotula aquatica
36
Which wildlife santuary in Kerala owes its name to the rare endemic tree species, Gluta travancorica?
Answer
C. Shendurney Wildlife Sanctuary
37
'Black dammer' is obtained from
Answer
A. Canarium strictum
38
An example for a partial root parasite is
Answer
B. Santalum album
39
The chapman cycle is associated with
Answer
C. Ozone layer
40
Tonoplast is the membrane of
Answer
A. Vacuole
41
Mitochondria is a semi-autonomous body because it contains
Answer
B. DNA, RNA and Ribosomes
42
Holandric genes are
Answer
B. Genes of Y chromosomes
43
An example of quantitative inheritance is
Answer
C. Skin colour in man
44
Seeds which can survive drying/freezing during ex-situ conservation and with long viability period is termed as
Answer
A. Orthodox seeds
45
In eukaryotes, the link reaction of cellular respiration takes place in
Answer
B. Mitochondrial matrix
46
Inulin is a
Answer
C. Polysaccharide
47
Any of the variants of an enzyme that are coded by alleles at a single genetic locus is called
Answer
B. Allozyme
48
In paper chromatography, the stationery phase is
Answer
B. Water
49
The maximum probability of rejecting the null hypothesis when the null hypothesis is true is called
Answer
B. Significant level
50
Callus regeneration is an example for
Answer
A. Re-differentiation
51
The presence of which substance made the origin of photosynthetic prokaryotes in primitive sea
Answer
C. Porphyrin
52
The pre-historic man who made use of fire is
Answer
D. Java man
53
In biological communities, some species are important in determining the ability of large number of species to persist there, they are termed as
Answer
C. Keystone species
54
Which of the following is an example for homology and similarity tool?
Answer
A. BLAST
55
Selection favoring one extreme of a trait is called
Answer
B. Directional
56
Which is used to find out the extent of asymmetry and direction?
Answer
C. Skewness
57
Name a general-purpose multiple sequence alignment program for DNA or proteins.
Answer
B. CLUSTAL
58
The international treaty in 1992, formed by United Nations Framework Convention on Climate Change (UNFCCC) that commits state parties to reduce greenhouse gas emissions
Answer
A. Kyoto Protocol
59
Which of the following is the first completed and published gene sequence?
Answer
A. ΦX174
60
Electrophoresis technique to separate charged molecular particles, was first developed by
Answer
B. Tiselius
61
A statistical measure used in several fields to estimate the number of cases that have not yet been observed, based on two independent sets of observed cases
Answer
B. Lincoln index
62
The computer simulation refers to
Answer
C. In Silico
63
In ECG, the P wave represents
Answer
C. Atrial depolarization
64
Leptospirosis, the most widespread zoonotic disease is due to Leptospira interrogans. It is an
Answer
A. aerobic, gram negative, spirochete
65
Match columns A and B choose the correct answer: A B A. Epstein-Barr Virus 1. RNA tumor virus B. Human Papilloma Virus 2. Syphilis C. Hepatitis C Virus 3. Lymphoma D. Treponema 4. Genital Warts 5. Mad Cow disease 5. Prison
Answer
A. A-3, B-4, C-1, D-2, E-5
66
Widal test is used to detect
Answer
B. Enteric fever
67
Larger subunit of Eukaryotic ribosomes contains
Answer
C. 28 S rRNA, 5.8 S rRNA, 5 S rRNA and about 50 proteins
68
The variation in the lengths of restriction DNA fragments between individuals of a species is called
Answer
D. RFLP
69
Identify the wrong statement.
Answer
D. In human, sperm mitochondria can be seen twiested spirally around axial filament of tail piece to provide energy
70
In which of the following hormone, receptor is found associated on the cell membrane?
Answer
C. Insulin
71
The ratio between energy flow at different points in a food chain and expressed as percentage is known as
Answer
D. Ecological efficiency
72
In Drosophila, white eye mutation leads to de-pigmentation of body parts. It is an example for
Answer
B. Pleiotropy
73
Which among the following belongs to Urochordata?
Answer
C. Salpa
74
Which area in human brain is concerned with the comprehension of speech?
Answer
C. Wernicke's area
75
Which of the following is the characteristics of a cancer cell?
Answer
C. Loss of anchorage dependence
76
Biosphere reserves differ from National Park and Wildlife Sanctuaries because in the former
Answer
B. people are integral part of the system
77
Which among the following phenomena play an important role in driving small animal populations to extinction?
Answer
C. Allee's effect
78
Deamination of bases is a common chemical event that produces spontaneous mutation. Which one of the following bases will be formed by deamination of 5-methylcytosine?
Answer
B. Thymine
79
The first step in glycogen breakdown releases glucose units as
Answer
B. glucose 1-phosphate
80
Which one of the following does NOT contribute to micro-evolutionary change?
Answer
B. Random mating
81
The inborn error of amino acid metabolism, alkaptonuria is due to the lack of one of the following enzymes
Answer
C. Homogentisate oxidase
82
The key determinant of the plane of cytokinesis in mammalian cells is the position of
Answer
C. Central spindle
83
Which protein secreted by the amphibian organizer induces neural tissue formation by inhibiting bone morphogenetic protein?
Answer
B. Noggin
84
Cladistic classification is based on
Answer
A. sequential order in which branches arise from a phylogenetic tree
85
Microbial leaching involves the process of dissolution of metals from ore breaking rocks using microorganisms. Which one of the following bacteria helps in leaching copper from its ore?
Answer
A. Acidithiobacillus ferroxidans
86
Which of the following atomic nuclei cannot be probed by nuclear magnetic resonance spectroscopy?
Answer
C. 16�
87
In the case of monoclonal antibody production by hybridoma technology, myeloma cells used lack the enzyme 'hypoxanthine-guanine phosphoriboxyl transferase (HGPRT) such that fused cells can only survive when selected on hypoxanthine-aminopterin-thymidine (HAT). What is the role of aminopterin in this medium?
Answer
B. To block the pathway for nucleotide synthesis
88
DiGeorge syndrome is caused by
Answer
D. 22q11 deletion
89
Michaelis and Menten derived their equation using which of the following assumption?
Answer
A. Rate limiting step in the reaction is the breakdown of ES complex to product and free enzyme
90
Most common type of phospholipid in the cell membrane of nerve cells is
Answer
A. phosphatidylcholine
91
The maternal effect gene products that regulate the production of anterior structures in Drosophila embryo?
Answer
B. Bicoid and Hunchback
92
Release of intracellular 𝐶𝑎 + is due to
Answer
D. Activation of 𝐼𝑃3 receptors
93
Which of the following is a component of the coenzyme A?
Answer
B. Pantothenic acid
94
Production of excessive amount of corticotropin (ACTH) occurs in which one of the following
Answer
B. Cushing's syndrome
95
The Biosafety Protocol, 2000 was conducted in
Answer
A. Montreal
96
The first DNA vaccine approved in India is
Answer
C. ZyCov D
97
Which of the following functions are macrophages unable to carry out?
Answer
C. T cell priming
98
Which of the following selection pressure is obtained in late succession stage?
Answer
A. K-selection
99
What is chromosome walking?
Answer
A. Hybridization technique
100
What is microsome?
Answer
D. Small vesicles of fragmented ER
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