Scientific Officer Biology (SR for SC/ST and ST only) – Kerala Police Service Forensic Science Laboratory
PROVISIONAL ANSWER KEY
Question Paper Code: 94/2022/OL
Category Code: 113/2022
Exam: Scientific Officer Biology (SR for SC/ST and ST only)
Date of Test 01-12-2022
Department Kerala Police Service Forensic Science Laboratory
Alphacode A
Question1:-Agar-agar is found in which part of the algal cell?
A:-Plasma membrane
B:-Cell Wall
C:-Chloroplast
D:-Vacuole
Correct Answer:- Option-B
Question2:-‘Red Snow’ is a phenomenon caused by Chlamydomonas nivalis is due to the presence of the pigment
A:-Fucoxanthin
B:-Violaxanthin
C:-Phycoerythrin
D:-Astaxanthin
Correct Answer:- Option-D
Question3:-‘Spawn’ in mushroom cultivation is the mixture of sterilized grain with
A:-Basidiospores
B:-Basidium
C:-Mycellium
D:-Basidiocarp
Correct Answer:- Option-C
Question4:-Lichens reproduce by
A:-Soredium
B:-Oidium
C:-Both 1 and 2
D:-None of these
Correct Answer:- Option-A
Question5:-The name ‘Bordeaux’ in Bordeaux mixture came from
A:-A fungus
B:-A chemical
C:-A crop
D:-A place
Correct Answer:- Option-D
Question6:-The bio fungicide Trichoderma Viride is belonging to the major group
A:-Algae
B:-Fungi
C:-Bacteria
D:-Lichens
Correct Answer:- Option-B
Question7:-Which one of the following is a fossil Bryophyte?
A:-Dawsonia
B:-Buxbaumia
C:-Niadita
D:-All of the above
Correct Answer:- Option-C
Question8:-Bryophytes are said to be the ‘amphibians of the plant kingdom’ because
A:-They can live in both water and land
B:-Water is essential to do fertilization
C:-Water is essential for their survival
D:-All of the above
Correct Answer:- Option-B
Question9:-Vascular bundles are found scattered in the ground tissue is called
A:-Atacostele
B:-Solenostele
C:-Meristele
D:-None of the above
Correct Answer:- Option-A
Question10:-Find out the xerophytic species of Selaginella from the following
A:-Selagilnella lepidophylla
B:-Selagilnella pilifera
C:-Selaginella rupestris
D:-All of the above
Correct Answer:- Option-D
Question11:-Which of the following statement is correct with regard to Cycas?
A:-Antherozoids are the largest in size in the plant kingdom
B:-Ovules are the biggest among the plant kingdom
C:-Potential true polyembryony is present
D:-All of the above
Correct Answer:- Option-D
Question12:-In Gymnosperms, the endosperm is
A:-Haploid
B:-Diploid
C:-Triploid
D:-Tetraploid
Correct Answer:- Option-A
Question13:-Generally, antibiotics are not effective for viral disease because
A:-Viruses are without cell wall
B:-Viruses are non-living
C:-Viruses are non-cellular in nature
D:-All of the above
Correct Answer:- Option-A
Question14:-Birbal Sahni Institute of Palaeosciences is located at
A:-Delhi
B:-Pune
C:-Lucknow
D:-Kolkata
Correct Answer:- Option-C
Question15:-A Jurassic angiosperm fossil found by the Indian Palaeobotanist Birbal Sahni is
A:-Homoxylon
B:-Trochodendron
C:-Palmoxylon
D:-Tetracentron
Correct Answer:- Option-A
Question16:-Passage cells are found in
A:-Epidermis
B:-Hypodermis
C:-Endodermis
D:-Pericycle
Correct Answer:- Option-C
Question17:-Which tissue of Corchorus Capsularis is Jute Fibre?
A:-Xylem fibre
B:-Phloem fibre
C:-Sclerenchymatous hypodermis
D:-Endodermis
Correct Answer:- Option-B
Question18:-Which one of the following is a coal tar dye?
A:-Haematoxylin
B:-Brazilin
C:-Carmine
D:-Erythrosine
Correct Answer:- Option-D
Question19:-Phase contrast microscope was invented by
A:-Robert Hooke
B:-Knoll and Ruska
C:-Frits Zernike
D:-Leeuwenhoek
Correct Answer:- Option-C
Question20:-What is amphimixis?
A:-Normal act of sexual reproduction
B:-Formation of seedless fruits
C:-Embryo formation without fertilization
D:-Embryo formation from synergids
Correct Answer:- Option-A
Question21:-Male gametophyte in Angiosperm is
A:-Microspore mother cell
B:-Pollen grain
C:-Male gametes
D:-Sperm cells
Correct Answer:- Option-B
Question22:-Acetolysis of pollen grain is
A:-Treating with acetocarmine
B:-Treating with acetic acid
C:-Treating with a mixture of concentrated sulfuric acid and acetic anhydride
D:-All of the above
Correct Answer:- Option-C
Question23:-Sporopollenin is composed of
A:-Fatty acids
B:-Phenylpropanoids and phenolics
C:-Carotenoids
D:-All of the above
Correct Answer:- Option-D
Question24:-Which Travancore Maharaja introduced tapioca in Kerala?
A:-Sree. Vysakham Tirunal
B:-Sree. Chithira Tirunal
C:-Sree. Moolam Tirunal
D:-Sree. Avittom Tirunal
Correct Answer:- Option-A
Question25:-Which of the following statement is correct with regard to selection method in plant breeding?
A:-Selection does not create any variation
B:-Selection utilizes the variation that is already present in a population
C:-Both 1 and 2 are correct
D:-None of the above are correct
Correct Answer:- Option-C
Question26:-Random fluctuations in the numbers of gene variants in a population is called
A:-Mutation
B:-Migration
C:-Genetic drift
D:-Natural selection
Correct Answer:- Option-C
Question27:-“Ontogeny repeats phylogeny”. This theory is known as
A:-Natural Selection Theory
B:-Germplasm Theory
C:-Mutation Theory
D:-Recapitulation Theory
Correct Answer:- Option-D
Question28:-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
A:-Isotype
B:-Lectotype
C:-Neotype
D:-Syntype
Correct Answer:- Option-C
Question29:-Gynostemium is present in the family
A:-Asclepiadaceae
B:-Orchidaceae
C:-Scitamineae
D:-All of the above
Correct Answer:- Option-B
Question30:-Polyadelphous stamens are found in
A:-Bombax
B:-Citrus
C:-Both 1 and 2
D:-None of these
Correct Answer:- Option-C
Question31:-Morphology of the edible fleshy portion of Jack fruit is
A:-Bract
B:-Perianth
C:-Aril
D:-Mesocarp
Correct Answer:- Option-B
Question32:-A coffee substitute and food additive ‘Chicory’ (Cichorium intybus) belonging to the family
A:-Rubiaceae
B:-Asteraceae
C:-Boraginaceae
D:-Lamiaceae
Correct Answer:- Option-B
Question33:-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
A:-Only (ii)
B:-Only (i) and (ii)
C:-Only (i) and (iii)
D:-All of the above ((i) (ii) and (iii))
Correct Answer:- Option-D
Question34:-The largest sacred grove in Kerala State is
A:-Panachikkadu Kavu
B:-Vallikavu
C:-Iringol Kavu
D:-Kulathur Kavu
Correct Answer:- Option-C
Question35:-What is the botanical name of ‘Kallur Vanchi’ which is a famous herb traditionally used in kerala for the treatment of kidney/bladder stone?
A:-Scoparia dulsis
B:-Homonoia retusa
C:-Homonoia riparia
D:-Rotula aquatica
Correct Answer:- Option-D
Question36:-Which wildlife santuary in Kerala owes its name to the rare endemic tree species, Gluta travancorica?
A:-Chimmony Wildlife Sanctuary
B:-Chulannur Wildlife Sanctuary
C:-Shendurney Wildlife Sanctuary
D:-Kurinjimala Wildlife Sanctuary
Correct Answer:- Option-C
Question37:-‘Black dammer’ is obtained from
A:-Canarium strictum
B:-Vateria indica
C:-Boswellia sacra
D:-Boswellia serrata
Correct Answer:- Option-A
Question38:-An example for a partial root parasite is
A:-Christisonia tubulosa
B:-Santalum album
C:-Aeginetia indica
D:-Orobanche aegyptiaca
Correct Answer:- Option-B
Question39:-The chapman cycle is associated with
A:-Global warming
B:-Acid rain
C:-Ozone layer
D:-EI Nino
Correct Answer:- Option-C
Question40:-Tonoplast is the membrane of
A:-Vacuole
B:-Glyoxysome
C:-Peroxisome
D:-All of the above
Correct Answer:- Option-A
Question41:-Mitochondria is a semi-autonomous body because it contains
A:-ATpase
B:-DNA, RNA and Ribosomes
C:-Oxysomes
D:-Both 1 and 2
Correct Answer:- Option-B
Question42:-Holandric genes are
A:-Genes of X chromosomes
B:-Genes of Y chromosomes
C:-Genes of Autosomes
D:-None of these
Correct Answer:- Option-B
Question43:-An example of quantitative inheritance is
A:-Blood group in man
B:-Eye colour in man
C:-Skin colour in man
D:-Coat colour in mouse
Correct Answer:- Option-C
Question44:-Seeds which can survive drying/freezing during ex-situ conservation and with long viability period is termed as
A:-Orthodox seeds
B:-Recalcitrant seeds
C:-Intermediate seeds
D:-None of these
Correct Answer:- Option-A
Question45:-In eukaryotes, the link reaction of cellular respiration takes place in
A:-Cytoplasm
B:-Mitochondrial matrix
C:-Mitochondrial inner membrane
D:-Mitochondrial inter membrane space
Correct Answer:- Option-B
Question46:-Inulin is a
A:-Monosaccharide
B:-Oligosaccharide
C:-Polysaccharide
D:-None of these
Correct Answer:- Option-C
Question47:-Any of the variants of an enzyme that are coded by alleles at a single genetic locus is called
A:-Isozyme
B:-Allozyme
C:-Coenzyme
D:-Allosteric enzyme
Correct Answer:- Option-B
Question48:-In paper chromatography, the stationery phase is
A:-Paper
B:-Water
C:-Both 1 and 2
D:-None of these
Correct Answer:- Option-B
Question49:-The maximum probability of rejecting the null hypothesis when the null hypothesis is true is called
A:-Degree of freedom
B:-Significant level
C:-Critical value
D:-Calculated value
Correct Answer:- Option-B
Question50:-Callus regeneration is an example for
A:-Re-differentiation
B:-De-differentiation
C:-Both 1 and 2
D:-None of these
Correct Answer:- Option-A
Question51:-The presence of which substance made the origin of photosynthetic prokaryotes in primitive sea
A:-Magnesium
B:-Sodium
C:-Porphyrin
D:-Haemocyanin
Correct Answer:- Option-C
Question52:-The pre-historic man who made use of fire is
A:-Cro-magnon man
B:-Neanderthal man
C:-Peking man
D:-Java man
Correct Answer:- Option-D
Question53:-In biological communities, some species are important in determining the ability of large number of species to persist there, they are termed as
A:-Flagship species
B:-Endemic species
C:-Keystone species
D:-Consumer species
Correct Answer:- Option-C
Question54:-Which of the following is an example for homology and similarity tool?
A:-BLAST
B:-RasMol
C:-EMBOSS
D:-PROSPECT
Correct Answer:- Option-A
Question55:-Selection favoring one extreme of a trait is called
A:-Centrifugal
B:-Directional
C:-Stabilizing
D:-Disruptive
Correct Answer:- Option-B
Question56:-Which is used to find out the extent of asymmetry and direction?
A:-SD
B:-Median
C:-Skewness
D:-Variance
Correct Answer:- Option-C
Question57:-Name a general-purpose multiple sequence alignment program for DNA or proteins.
A:-FASTA
B:-CLUSTAL
C:-BLAST
D:-None of the above
Correct Answer:- Option-B
Question58:-The international treaty in 1992, formed by United Nations Framework Convention on Climate Change (UNFCCC) that commits state parties to reduce greenhouse gas emissions
A:-Kyoto Protocol
B:-Montreal Protocol
C:-Earth Summit
D:-Worid Summit
Correct Answer:- Option-A
Question59:-Which of the following is the first completed and published gene sequence?
A:-ΦX174
B:-T4 phage
C:-M13 phage
D:-Lambda phage
Correct Answer:- Option-A
Question60:-Electrophoresis technique to separate charged molecular particles, was first developed by
A:-Tswett
B:-Tiselius
C:-Sanger
D:-Franklin
Correct Answer:- Option-B
Question61:-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
A:-Standard deviation
B:-Lincoln index
C:-Fischer index
D:-Students t-test
Correct Answer:- Option-B
Question62:-The computer simulation refers to
A:-Dry lab
B:-In Vitro
C:-In Silico
D:-Wet lab
Correct Answer:- Option-C
Question63:-In ECG, the P wave represents
A:-Atrial repolarization
B:-Atrial diastole
C:-Atrial depolarization
D:-Ventricular systole
Correct Answer:- Option-C
Question64:-Leptospirosis, the most widespread zoonotic disease is due to Leptospira interrogans. It is an
A:-aerobic, gram negative, spirochete
B:-aerobic, gram positive, spirochete
C:-aerobic, gram negative bacterium
D:-anaerobic bacterium
Correct Answer:- Option-A
Question65:-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
A:-A-3, B-4, C-1, D-2, E-5
B:-A-4, B-3, C-1, D-2, E-5
C:-A-5, B-4, C-3, D-2, E-1
D:-A-1, B-4, C-3, D-2, E-5
Correct Answer:- Option-A
Question66:-Widal test is used to detect
A:-Tuberculosis
B:-Enteric fever
C:-Typhidot
D:-Pregnancy
Correct Answer:- Option-B
Question67:-Larger subunit of Eukaryotic ribosomes contains
A:-23 S rRNA, 18 S rRNA and about 33 proteins
B:-28 S rRNA, 18 S rRNA and about 50 proteins
C:-28 S rRNA, 5.8 S rRNA, 5 S rRNA and about 50 proteins
D:-18 S rRNA, 28 S rRNA, 5.8 S rRNA and about 33 proteins
Correct Answer:- Option-C
Question68:-The variation in the lengths of restriction DNA fragments between individuals of a species is called
A:-RAPD
B:-AFLP
C:-SSR
D:-RFLP
Correct Answer:- Option-D
Question69:-Identify the wrong statement.
A:-Monoflagellated spermatozoa is present in sea urchin and Amphioxus
B:-Sperm is star shaped in cray fishers
C:-Most elasmobranchs have biflagellate sperms
D:-In human, sperm mitochondria can be seen twiested spirally around axial filament of tail piece to provide energy
Correct Answer:- Option-D
Question70:-In which of the following hormone, receptor is found associated on the cell membrane?
A:-T3
B:-Aldosterone
C:-Insulin
D:-Both 1 and 3
Correct Answer:- Option-C
Question71:-The ratio between energy flow at different points in a food chain and expressed as percentage is known as
A:-Ecological capacity
B:-Ecological potential
C:-Ecological assimilation
D:-Ecological efficiency
Correct Answer:- Option-D
Question72:-In Drosophila, white eye mutation leads to de-pigmentation of body parts. It is an example for
A:-Multiple allelism
B:-Pleiotropy
C:-Polygenic inheritance
D:-Complementary inheritance
Correct Answer:- Option-B
Question73:-Which among the following belongs to Urochordata?
A:-Amphioxus
B:-Myxine
C:-Salpa
D:-Balanoglossus
Correct Answer:- Option-C
Question74:-Which area in human brain is concerned with the comprehension of speech?
A:-Broca’s area
B:-Association area
C:-Wernicke’s area
D:-Hippo campus
Correct Answer:- Option-C
Question75:-Which of the following is the characteristics of a cancer cell?
A:-Density dependent inhibition
B:-Contact inhibition
C:-Loss of anchorage dependence
D:-Apoptosis
Correct Answer:- Option-C
Question76:-Biosphere reserves differ from National Park and Wildlife Sanctuaries because in the former
A:-human beings are not allowed to enter
B:-people are integral part of the system
C:-plants are given greater attention than the animals
D:-living organisms are brought from all over the world and preserved
Correct Answer:- Option-B
Question77:-Which among the following phenomena play an important role in driving small animal populations to extinction?
A:-Shannon index
B:-Simpson’s diversity index
C:-Allee’s effect
D:-Whittaker’s effect
Correct Answer:- Option-C
Question78:-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?
A:-Uracil
B:-Thymine
C:-Cytosine
D:-Guanine
Correct Answer:- Option-B
Question79:-The first step in glycogen breakdown releases glucose units as
A:-glucose 6-phosphate
B:-glucose 1-phosphate
C:-glucose
D:-glucose and glucose 6-phosphate
Correct Answer:- Option-B
Question80:-Which one of the following does NOT contribute to micro-evolutionary change?
A:-Mutation
B:-Random mating
C:-Genetic drift
D:-Natural selection
Correct Answer:- Option-B
Question81:-The inborn error of amino acid metabolism, alkaptonuria is due to the lack of one of the following enzymes
A:-Fumaryl acetoacetate hydrolase
B:-α-keto acid decarboxylase
C:-Homogentisate oxidase
D:-p-hydroxyphertyl pyruvate dehydroxylase
Correct Answer:- Option-C
Question82:-The key determinant of the plane of cytokinesis in mammalian cells is the position of
A:-Centriole
B:-Chromosome
C:-Central spindle
D:-Pre-prophase band
Correct Answer:- Option-C
Question83:-Which protein secreted by the amphibian organizer induces neural tissue formation by inhibiting bone morphogenetic protein?
A:-β-catenin
B:-Noggin
C:-Dickhopf
D:-Dishevelled
Correct Answer:- Option-B
Question84:-Cladistic classification is based on
A:-sequential order in which branches arise from a phylogenetic tree
B:-the order of sequence of divergence
C:-morphological features and skeleton of individuals
D:-cellular organization and cytoskeleton
Correct Answer:- Option-A
Question85:-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?
A:-Acidithiobacillus ferroxidans
B:-Pseudomonas putida
C:-Deinococcus radiodurans
D:-Rhodopseudomonas capsulate
Correct Answer:- Option-A
Question86:-Which of the following atomic nuclei cannot be probed by nuclear magnetic resonance spectroscopy?
A:-1�
B:-31�
C:-16�
D:-14�
Correct Answer:- Option-C
Question87:-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?
A:-To be used as cell cycle inhibitor of myeloma cells
B:-To block the pathway for nucleotide synthesis
C:-To facilitate fusion of myeloid B cells and antibody producing B cells
D:-To facilitate production of antibody producing B cells
Correct Answer:- Option-B
Question88:-DiGeorge syndrome is caused by
A:-11p22 deletion
B:-22p11 deletion
C:-11q22 deletion
D:-22q11 deletion
Correct Answer:- Option-D
Question89:-Michaelis and Menten derived their equation using which of the following assumption?
A:-Rate limiting step in the reaction is the breakdown of ES complex to product and free enzyme
B:-Rate limiting step in the reaction is the formation of ES complex
C:-Concentration of the substrate can be ignored
D:-Non-enzymatic degradation of the substrate is the major step
Correct Answer:- Option-A
Question90:-Most common type of phospholipid in the cell membrane of nerve cells is
A:-phosphatidylcholine
B:-phosphatidylinositol
C:-phosphatidylserine
D:-sphingomyelin
Correct Answer:- Option-A
Question91:-The maternal effect gene products that regulate the production of anterior structures in Drosophila embryo?
A:-Bicoid and Nanos
B:-Bicoid and Hunchback
C:-Bicoid and Caudal
D:-Nanos and Caudal
Correct Answer:- Option-B
Question92:-Release of intracellular 𝐶𝑎 2+is due to
A:-Absence of 𝑃𝐼𝑃2hydrolysis
B:-Rapid dephosphorylation of 𝐼𝑃3
C:-Retention of DAG in cytoplasm
D:-Activation of 𝐼𝑃3receptors
Correct Answer:- Option-D
Question93:-Which of the following is a component of the coenzyme A?
A:-Retinol
B:-Pantothenic acid
C:-Pyridoxine
D:-Retinoic acid
Correct Answer:- Option-B
Question94:-Production of excessive amount of corticotropin (ACTH) occurs in which one of the following
A:-Grave’s disease
B:-Cushing’s syndrome
C:-Grieg’s syndrome
D:-Addison’s syndrome
Correct Answer:- Option-B
Question95:-The Biosafety Protocol, 2000 was conducted in
A:-Montreal
B:-Kyoto
C:-Stockholm
D:-Rio de Janeiro
Correct Answer:- Option-A
Question96:-The first DNA vaccine approved in India is
A:-Engerix-B
B:-ActHIB
C:-ZyCov D
D:-Havrix
Correct Answer:- Option-C
Question97:-Which of the following functions are macrophages unable to carry out?
A:-Pinocytosis
B:-Phagocytosis
C:-T cell priming
D:-Antigen presentation to activated cells
Correct Answer:- Option-C
Question98:-Which of the following selection pressure is obtained in late succession stage?
A:-K-selection
B:-R-selection
C:-E-selection
D:-L-selection
Correct Answer:- Option-A
Question99:-What is chromosome walking?
A:-Hybridization technique
B:-Sequencing technique
C:-Genetic marker
D:-Chemical degradation technique
Correct Answer:- Option-A
Question100:-What is microsome?
A:-Compartment of Golgi complex
B:-Smaller ribosomes
C:-Small ER compartments
D:-Small vesicles of fragmented ER
Correct Answer:- Option-D
