| Post Name | Scientific Assistant (Biology) NCA- SC - Kerala Police Service Forensic Science Laboratory |
|---|---|
| Question Paper Code | 001/2021/OL |
| Category Code | 033/2019 |
| Date of Test | 2 March 2021 |
| Medium of Question | ENGLISH |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
Venous heart is the characteristic feature of
Answer
C. Mullet
2
Choose the organisms showing 'neoteny'
Answer
A. Oikopleura, Ambystoma
3
'Ammocoetes' is the larva of
Answer
B. Petromyzon
4
The left-handed, Zig-Zag double helix DNA, with only minor grooves is
Answer
C. Z-DNA
5
'Hybridoma' is a hybrid cell produced by the fusion of __________ and __________.
Answer
B. B-lymphocyte and Myeloma cell
6
'Bovine spongiform encephalopathi' is caused by
Answer
C. Prions
7
Name the micro-organism used in the bioremediation of oil-spill.
Answer
A. Pseudomonas putida
8
Which among the following is an attenuated vaccine ?
Answer
D. Measles vaccine
9
Cephalosporin controls bacterial growth by inhibiting _________ synthesis.
Answer
B. Cell wall
10
Name the antibody which can pass through the placenta.
Answer
B. IgG
11
Which among the following is NOT a transfection method ?
Answer
C. Colony hybridization
12
Degeneration of genetic code is attributed to the
Answer
D. Third member of codon
13
In split genes, the coding sequences are called
Answer
C. Exons
14
Genes which confer antibiotic resistance on bacteria are located on
Answer
B. Plasmid
15
Which among the following is NOT a ļ¬brillar protein ?
Answer
D. Albumin
16
Albinism is a congenital human disorder resulting from the lack of the enzyme
Answer
C. Tyrosinase
17
The starting t-RNA of prokaryotes is loaded with
Answer
C. Formylated Methionine
18
"Gene-battery model" of gene regulation in eukaryotes is proposed by
Answer
B. Britten and Davidson
19
The enzyme that removes the RNA-primer after DNA replication is
Answer
A. DNA polymerase-I
20
DNA replication occurs in
Answer
C. S-phase
21
A nucleosome is made of
Answer
D. DNA wrapped over octameric core of histone
22
Which among the following is NOT a continental Island ?
Answer
B. Mauritius
23
The active secretion of some substances from blood to urinary tubule is known as
Answer
D. Augmentation
24
The light and dark bands (stripes) of muscle ļ¬bres are called _________ and ________ respectively.
Answer
B. Isotropic bands and Anisotropic bands
25
The jumping of nerve impulses from one node to the next in medullated nerve ļ¬bre is called
Answer
C. Saltatory transmission
26
Which among the following is NOT a hypothalamic hormone ?
Answer
B. ACTH
27
The hormones secreted by thymus gland
Answer
D. All the above
28
Crossing-over and genetic recombination between adjoining non-sister chromatids occur during
Answer
A. Pachytene stage of ļ¬rst meiotic prophase
29
Edward's syndrome is the result of
Answer
B. Trisomy-18
30
The RNAs present in 80S Eukaryotes chromosomes
Answer
B. 28S rRNA, 5S rRNA, 5.8S rRNA and 18S rRNA
31
Which among the following is known as "Portuguese -man-of war" ?
Answer
B. Physalia
32
Phylum 'ctenophora' is known as
Answer
A. Comb-jellies
33
'Widal test' is used for the diagnosis of
Answer
B. Typhoid fever
34
"Itai-Itai disease" is caused by
Answer
C. Cadmium poisoning
35
The formation of new species from ancestral species as a result of the geographical isolation of fragmentation of the breeding population is called
Answer
D. Allopatric speciation
36
The selļ¬ess behaviour of an animal for the beneļ¬t of its conspeciļ¬c kins is known as
Answer
B. Altruism
37
Name two 'Ramsar Sites' in Kerala.
Answer
Question Cancelled
38
The type of isomerism shown by Fumaric acid and Maleic acid are
Answer
A. Geometrical isomerism with maleic acid (trans-form) and Fumaric acid (cis-form)
39
The protein structure involving the interaction, orientation and organization of two or more polypeptide chains to form a functional proteins
Answer
D. Quarternary structure
40
The chemoreceptor found in gastropod molluscus is
Answer
C. Osphradium
41
The scientiļ¬c method in which ļ¬nal conclusions and generalisations are drawn from speciļ¬c observations and analysis of known facts
Answer
A. Inductive method
42
Which among the following is a neutral stain ?
Answer
D. Leishman's stain
43
According to the Patent Act 1970 (Amended in 2005), the term of every patent granted in India is
Answer
D. 20 years from the date of ļ¬ling
44
Choose the 'Nucleotide Sequence' databases.
Answer
A. EMBL, GenBank, NCBI
45
The Nobel Prize 2020 winners for Chemistry
Answer
C. Emmanuelle Charpentier and Jennifer A. Doudna
46
Write the scientiļ¬c name of the ļ¬sh known as "Miss Kerala".
Answer
A. Sahyadria denisonii
47
Name the technique for determining the sequence speciļ¬city of DNA-binding proteins.
Answer
D. DNA foot printing
48
The group of genes that specify regions of the body plan of an embryo along the head-tail axis of animals.
Answer
B. Hox genes
49
Which among the following is a pest of paddy ?
Answer
C. Dicladispa armigera
50
In industrial fermentation, secondary metabolites are produced in _______ stage of microbial growth.
Answer
A. Idiophase
51
A mixture of DNA lysate has been analysed for nucleotides. It has been found that the Percentage of Guanine in that mixture was 18%, what will be the percentage of Thymine in that mixture by considering Chargaļ¬ rules ?
Answer
C. 32%
52
The š¶3 cycle has been often called an evolutionary ļ¬aw. What may be Plant Physiology basics the reason for saying so ? I. The rubisco enzyme that carries out š¶3 cycle is equal aļ¬nity to Oxygen II. The ļ¬aws in š¶3 cycle leads to Photorespiration which is less energy eļ¬cient III. The statement is incorrect, š¶3 cycle has no ļ¬aw Choose the correct statements
Answer
C. I and II
53
Phylogenetic trees constructed from a Gene locus "A" have resulted in 4 diļ¬erent tree topologies. I. Tree 1 with 5 changes II. Tree 2 with 4 changes III. Tree 3 with 6 changes IV. Tree 4 with 7 changes You are directed to select the tree having maximum parsimony. Which of the following statements is correct ?
Answer
A. All trees are equally acceptable hypothesis of evolution and tree 2 is the one with maximum parsimony
54
Which of these enzymes can be found associated with pyrenoids ? I. Alpha Amylase II. Rubisco III. PEP IV. Citric acid synthase
Answer
B. II
55
Wood Wide Web is a term used to denote
Answer
A. Mycorrhiza
56
Pichia kudriavzevii is the teleomorph of the Candida Krusei, which of the following statements are true ? I. Pichia Kudriavzevii and Candida Krusei are same organism and teleomorph is the sexual stage of an organism II. Pichia Kudriavzevii and Candida Krusei are diļ¬erent organisms, teleomorph is diļ¬erent organism showing same morphology III. Pichia Kudriavzevii and Candida Krusei are related organisms, teleomorph is diļ¬erent organism showing same physiology
Answer
C. I
57
Root wilt is a serious disease causing havoc in Kerala coconut plantations.
Answer
B. The disease is caused by Phytoplasma, Plant hopper and lacewing bug spreads the disease
58
Which of this is a recently (in 2019) reported bryophyte from Kerala ?
Answer
D. Riccia sahyadrica
59
Which among the following is Not a class in the recent classiļ¬cation of Pteridophytes by Smith ?
Answer
D. Sphaenopsida
60
Archaeosperma arnoldii is a remarkable fossil found from the famennian of Penysylvania, USA. What makes this fossil remarkable ? ļæ½ļæ½ I. It is the 1 record of angiosperm fossil II. It is the earliest ovuliferous structure due to the presence of cupules III. It is indication of early seed habit due to the presence of Endosperm Which of these statements are true ?
Answer
C. II
61
Which of these plants yield an anticancer drug ?
Answer
C. Taxus brevifolia
62
Which of the following statements are true about R-Plasmids ? I. It is extrachromosomal genetic material II. It have genes encoding bacterial toxins III. It is circular and confer resistance to antibiotics IV. It can spread fast in bacterial populations
Answer
D. I, III and IV
63
The 6 Mass extinction is called as
Answer
A. Holocene extinction
64
Consider the following type of secondary thickening in Xylem I. Annular II. Pitted III. Helical IV. Reticulate Which is the correct order of progression ?
Answer
C. I, III, IV and II
65
P-Protein can be seen in
Answer
C. Sieve tube elements
66
Replacing the dehydrating agent in sections with a solvent of paraļ¬n is called clearing because
Answer
C. Most clearing agents makes the sections more translucent
67
The endometaphase can be seen in
Answer
A. Abnormal Mitosis in Tapetum
68
The speciation event due to founder eļ¬ect in small populations is known by
Answer
D. Peripatric
69
The primitive condition of apocarpy NOT seen in
Answer
C. Capparidaceae
70
Which among the following is an Eponym ?
Answer
B. Rotala vasudevanii
71
Which among the following trait can be considered as a synapomorphy for eudicots ?
Answer
B. Tricolpate Pollen
72
Which of these plants NOT belonging to the family Amaranthaceae (APG) ?
Answer
D. Cerastium
73
In the families listed below 2 are closely related by phylogenetic terms. I. Caryophyllaceae II. Malvaceae III. Capparidaceae IV. Amaranthaceae Whihc are they ?
Answer
C. IV and I
74
Which is NOT an accepted Acronym ?
Answer
D. MOU
75
Which is an evidence for the concept of ļ¬ower as a modiļ¬ed shoot ? I.Reduction in Stamens with an increase in number of petals in cultivated roses II. Gynandrophore of Gynandropsis III. Foliar open carpels of Fabaceae IV. Syconium of Ficus
Answer
C. I, II and III
76
The plant Agave sisalana has been cultivated and harvested for
Answer
A. Sisal Fiber
77
The haploid chromosome number of Rice is
Answer
C. 12
78
The TBGRI model of beneļ¬t sharing has been associated with which of the following ? I. Kani Tribes II.Trichopus zeylanicus III. Forest Development IV. Ethnomedicine
Answer
D. I, II and IV
79
The endemic plant that has been rediscovered after a period of 135 years from a sacred grove of Kerala
Answer
A. Madhuca diplostemon
80
Find the Minor Forest Products (NWFP) from the list I. Acacia torta II. Adenanthera pavonina III. Caesalpinia bonduc IV. Aegle marmelos
Answer
D. I, II, III and IV
81
An international agreement that aimed to manage and reduce carbon dioxide emissions and greenhouse gases is
Answer
B. Kyoto Protocol
82
The objectives of carbon farming are I. Lock carbon from atmosphere through farming II.Reduce reliance on chemical fertilizers through carbon rich organic fertilisers III. Increase the crop yield and food security IV. Increase the farming of seaweeds
Answer
D. I only
83
The fossil plant _______ can be seen in all continents and land masses that was part of the ancient Gondwana land which is regarded as a proof for plate tectonics.
Answer
B. Glossopteris
84
From the conditions listed below those that contributes to high risk of species extinction are I. Long Life Span II. Low Dispersal Ability III. High Degree of Specialization IV. Low Reproductive Ability
Answer
B. II, III and IV
85
An amino acid with a non polar side chain is
Answer
B. Alanine
86
You are tasked with cloning of a plant gene in bacterial systems and later its expression in cultured cells. Which type of vector you should select for easy cloning and expression ?
Answer
C. Shuttle Vector
87
The 70S ribosomes that can be seen in Chloroplast and Mitochondria is I. An evidence for Endosymbiont Hypothesis on origin of Eukaryotes II. Prokaryotic ancestor of Chloroplast and Mitochondria III. Less eļ¬cient in translation comparing to 80S ribosomes in the cytoplasm
Answer
C. I and II
88
Arrange the following algae based on its evolutionary advancement of thallus I. Volvox II. Ulothrix III. Chlamydomonas IV. Ulva V. Chara
Answer
B. III, I, II, IV, V
89
What properties of RNA support the hypothesis that it was the ļ¬rst self-replicating molecule in early evolution ? I. It can transfer amino acids for protein synthesis II. It can store and pass information III. It can catalyse its own synthesis IV. It can form 3D structures V. It has catalytic activity
Answer
D. II, III and V
90
The small polar molecules, ions and macromolecules (proteins and RNAs) can travel between the nucleus and the cytoplasm through
Answer
D. Nuclear pore complexes
91
One among the following technique is a Taxon speciļ¬c technique that can assist in identiļ¬cation of Taxon like species
Answer
C. DNA Barcoding
92
You are entrusted to analyse leaf sample for the presence of a protein followed by its structure determination. Which are the techniques you can use for these experiments ? I. Western Blotting II. 2D PAGE III. MALDI TOF MS IV. X-Ray Crystallography
Answer
D. All of these
93
Which of the following crops are sterile due to triploid chromosome number ? I. Banana II. Citrus III. Watermelon IV. Grapes
Answer
B. I and III
94
Plants has evolved to overcome the aļ¬nity of Rubisco to Oxygen by spatial and time separation of carbon dioxide ļ¬xation from the vicinity of atmosphere having oxygen and carbon dioxide
Answer
C. C4 cycle is separation in space and CAM in time respectively
95
A solution of pH 4 has been diluted by adding 40 ml of double distilled water to 10 ml of the solution. What will be the pH of the diluted solution ?
Answer
A. 4.5
96
The lab you are working is entrusting you to ļ¬nd out the molecular weight of a recently puriļ¬ed protein. Which of the following techniques available in the laboratory that you will be using for this task ?
Answer
A. Density Gradient Centrifugation
97
Name the software package that can be used to phylogenetic analysis of plants I. NTSYS II. Mesquite III. Darwin IV. Phylip
Answer
D. All of these
98
CRISPR CAS 9, which won 2020 Nobel Prize is a
Answer
A. Gene Editing Technique
99
An algae that is commonly used for the production of single cell protein is
Answer
A. Arthrospira
100
The lichen group that forms the primary coloniser of a barren rock surface is
Answer
A. Crustose
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