এই post-এ আমরা আপনাদের জন্য নিয়ে এসেছি WBCS Preliminary Previous Year Biology Questions with Answers (2000–2023) — যেখানে সমস্ত Biology PYQ গুলি এক জায়গায় Year Wise এবং exam-oriented ভাবে দেওয়া হয়েছে, সাথে রয়েছে Correct Answers।
WBCS Preliminary Biology Questions (2000–2023)
Below is the complete list of Biology questions asked in WBCS Prelims from 2000 up to 2023 with answers.
Q. 1) Which of the following diseases is autosomal?
(WBCS Preliminary Exam: 2023)
A) Haemophilia
B) Thalassemia
C) Colour blindness
D) All of the above
Correct Answer: Thalassemia
Q. 2) Which hormone is responsible for breaking the dormancy of a seed?
(WBCS Preliminary Exam: 2023)
A) Auxin
B) Dormin
C) Cytokinin
D) Gibberellin
Correct Answer: Gibberellin
Q. 3) Which of the following pairs comprises of the smallest and the largest endocrine glands of human respectively?
(WBCS Preliminary Exam: 2023)
A) Pituitary-thyroid
B) Thyroid-pituitary
C) Pineal body-ovary
D) Pineal body-thyroid
Correct Answer: Pineal body-thyroid
Q. 4) Which of the following reproductions is found in plants alone?
(WBCS Preliminary Exam: 2023)
A) Vegetative reproduction
B) Asexual reproduction
C) Sexual reproduction
D) Parthenogenesis
Correct Answer: Vegetative reproduction
Q. 5) Which institution has released the ‘Adaptation Gap Report 2022‘ ?
(WBCS Preliminary Exam: 2023)
A) NITI Aayog
B) UNEP
C) WSF
D) WEF
Correct Answer: UNEP (United Nations Environment Programme)
Q. 6) Cause of myopia is
(WBCS Preliminary Exam: 2023)
A) contraction of eyeball
B) expansion of eyeball
C) dryness of optic nerve
D) All are true
Correct Answer: expansion of eyeball
Q. 7) One of the following terms includes rest of the lot. Identify that single term:
(WBCS Preliminary Exam: 2023)
A) Mineralocorticoids
B) Adrenaline
C) Suprarenal gland
D) Glucocorticoids
Correct Answer: Suprarenal gland
Q. 8) The main source of methane gas in India —
(WBCS Preliminary Exam: 2023)
A) Floriculture gardens
B) Orchards
C) Tea gardens
D) Paddy fields
Correct Answer: Paddy fields
Q. 9) Which state/union territory has launched a ‘15-point Winter Action Plan‘ to control air pollution?
(WBCS Preliminary Exam: 2023)
A) Punjab
B) New Delhi
C) Rajasthan
D) Haryana
Correct Answer: New Delhi
Q. 10) The word, ‘Biodiversity’ was coined by
(WBCS Preliminary Exam: 2023)
A) Ernst Mayr
B) W.G. Rosen
C) Tansley
D) Odum
Correct Answer: W.G. Rosen
Q. 11) Forests having no free entry by people in India—
(WBCS Preliminary Exam: 2023)
A) National Park
B) Wildlife Sanctuary
C) Reserved Forest
D) Protected Forest
Correct Answer: National Park
Q. 12) In which substage of interphase is DNA doubled?
(WBCS Preliminary Exam: 2023)
A) G1
B) S
C) G2
D) G0
Correct Answer: S
Q. 13) Which one of the following animals is known as a ‘living fossil’?
(WBCS Preliminary Exam: 2022)
A) Peripatus
B) Amoeba
C) Prawn
D) Apple snail
Correct Answer: Peripatus
Q. 14) The radioactive element used in heart-pacemakers is
(WBCS Preliminary Exam: 2022)
A) Uranium
B) Deuterium
C) Plutonium
D) Radium
Correct Answer: Plutonium
Q. 15) The ‘powerhouse’ of cell is
(WBCS Preliminary Exam: 2022)
A) Nucleus
B) Lysosome
C) Mitochondria
D) DNA
Correct Answer: Mitochondria
Q. 16) The first transgenic crop was
(WBCS Preliminary Exam: 2022)
A) Tobacco
B) Cotton
C) Pea
D) Rice
Correct Answer: Tobacco
Q. 17) Which part of human eye has the maximum refractive index?
(WBCS Preliminary Exam: 2022)
A) Aqueous humour
B) Vitreous humour
C) Lens
D) Cornea
Correct Answer: Lens
Q. 18) Phytophthora palmivora is a
(WBCS Preliminary Exam: 2022)
A) bio-pesticide
B) bio-insecticide
C) mycoherbicide
D) first bio-herbicide
Correct Answer: mycoherbicide
Q. 19) What is the chromosome number in human ovum?
(WBCS Preliminary Exam: 2022)
A) 36
B) 46
C) 48
D) None of the above
Correct Answer: None of the above (23)
Q. 20) ‘ELISA’ test is employed to diagnose
(WBCS Preliminary Exam: 2022)
A) Polio Virus
B) AIDS antibodies
C) Tuberculosis
D) Cancer
Correct Answer: AIDS antibodies
Q. 21) Which of the following is an aquatic fern?
(WBCS Preliminary Exam: 2022)
A) Adiantum
B) Dryopteris
C) Salvinia
D) Equisetum
Correct Answer: Salvinia
Q. 22) ‘Seahorse‘ is a
(WBCS Preliminary Exam: 2022)
A) Mammal
B) Plant
C) Fish
D) None of the above
Correct Answer: Fish
Q. 23) Which one of the following animals is not ‘warm-blooded’?
(WBCS Preliminary Exam: 2022)
A) Hen
B) Tiger
C) Bat
D) Toad
Correct Answer: Toad
Q. 24) The vitamin which helps in clotting of blood is
(WBCS Preliminary Exam: 2022)
A) A
B) D
C) B
D) K
Correct Answer: K
Q. 25) Fermentation ability of Yeast is due to
(WBCS Preliminary Exam: 2022)
A) Amylase
B) Zymase
C) Invertase
D) Galactase
Correct Answer: Zymase
Q. 26) Which metal is present in haemoglobin?
(WBCS Preliminary Exam: 2022)
A) Iron
B) Zinc
C) Magnesium
D) Copper
Correct Answer: Iron
Q. 27) The leader of the Narmada Bachao Andolon is
(WBCS Preliminary Exam: 2021)
A) Anna Hajare
B) Medha Patker
C) Ramdev
D) Binayak Sen
Correct Answer: Medha Patker
Q. 28) ‘Chipko Andolon‘ is known as
(WBCS Preliminary Exam: 2021)
A) Feminist Movement
B) Tribal Movement
C) Political Movement
D) Caste Movement
Correct Answer: Feminist Movement
Q. 29) The ‘Namami Gange‘ Programme is associated with
(WBCS Preliminary Exam: 2021)
A) Worshipping Ganga
B) Canal irrigation
C) River linking
D) National Mission for Clean Ganga
Correct Answer: National Mission for Clean Ganga
Q. 30) Official name of the virus responsible for Covid-19 is
(WBCS Preliminary Exam: 2021)
A) SARS-CoV-2
B) Covid-19
C) nCovid-19
D) Corona Virus
Correct Answer: SARS-CoV-2
Q. 31) Researchers discovered antibody of which virus in bats from Mahabaleshwar?
(WBCS Preliminary Exam: 2021)
A) Nipah
B) Ebola
C) Covid 19
D) Zika
Correct Answer: Nipah
Q. 32) Plants receive nutrients from
(WBCS Preliminary Exam: 2020)
A) atmosphere
B) chlorophyll
C) soil
D) light
Correct Answer: soil
Q. 33) Greenhouse gas that is a product of fossil fuels is
(WBCS Preliminary Exam: 2020)
A) CO2
B) CH4
C) O3
D) N2O
Correct Answer: CO2
Q. 34) Which can bind O2 molecules?
(WBCS Preliminary Exam: 2020)
A) Red blood cells
B) White blood cells
C) Vitamin B12
D) Vitamin E
Correct Answer: Red blood cells
Q. 35) Excess fluoride in drinking water causes
(WBCS Preliminary Exam: 2020)
A) Lung disease
B) Intestinal Infection
C) Fluorosis
D) Rickets
Correct Answer: Fluorosis
Q. 36) The number of spinal nerves in human body are
(WBCS Preliminary Exam: 2019)
A) 12 pairs
B) 31 pairs
C) 31
D) 12
Correct Answer: 31 pairs
Q. 37) Food that gives more calories per unit mass is
(WBCS Preliminary Exam: 2019)
A) protein
B) carbohydrates
C) fat
D) water
Correct Answer: fat
Q. 38) ECG records
(WBCS Preliminary Exam: 2019)
A) rate of heart beats
B) potential difference
C) ventricular concentration
D) volume of blood pumped
Correct Answer: potential difference
Q. 39) Bio gas consists of
(WBCS Preliminary Exam: 2019)
A) CO, Methane, H2
B) CO2, Methane, H2
C) CO, Ethane, H2
D) CO2, Ethane, H2
Correct Answer: Carbon dioxide, Methane and Hydrogen
Q. 40) Alcohol damages the liver because it
(WBCS Preliminary Exam: 2019)
A) detoxifies alcohol
B) stores glycogen
C) secretes bile
D) accumulates excess fats
Correct Answer: accumulates excess of fats
Q. 41) Appiko movement was led by
(WBCS Preliminary Exam: 2018)
A) Sarala Ben
B) Mira Ben
C) Pandu Rao Hegde
D) Sundarlal Bahuguna
Correct Answer: Pandu Rao Hegde of Sirsi
Q. 42) Life span of red blood cells is
(WBCS Preliminary Exam: 2018)
A) 60
B) 120
C) 180
D) 240
Correct Answer: 120 days
Q. 43) Muscle fatigue is due to accumulation of
(WBCS Preliminary Exam: 2018)
A) Carbon Dioxide
B) Creatinine
C) Lactic acid
D) Ethyl alcohol
Correct Answer: Lactic acid
Q. 44) The number of milk teeth in man is
(WBCS Preliminary Exam: 2018)
A) 28
B) 29
C) 20
D) 12
Correct Answer: 20
Q. 45) O2 carried by 100 ml of pure human blood is
(WBCS Preliminary Exam: 2018)
A) 40 ml
B) 10 ml
C) 20 ml
D) 30 ml
Correct Answer: 20 ml
Q. 46) Main respiratory organ of whale?
(WBCS Preliminary Exam: 2018)
A) Integuments
B) Gills
C) Lungs
D) Trachea
Correct Answer: Lungs
Q. 47) Deficiency of Vitamin-D results in
(WBCS Preliminary Exam: 2018)
A) night blindness
B) rickets
C) scurvy
D) hair fall
Correct Answer: rickets
Q. 48) Nekton are
(WBCS Preliminary Exam: 2017)
A) floating organisms
B) swimming organisms
C) aquatic plant animals
D) sub-merged plants
Correct Answer: swimming organisms in water
Q. 49) Barr body is absent in somatic cell of
(WBCS Preliminary Exam: 2017)
A) Klinefelter
B) Triple X
C) Turner syndrome
D) Sub-human female
Correct Answer: Turner syndrome individual
Q. 50) A mammal that lays eggs
(WBCS Preliminary Exam: 2017)
A) Talpa
B) Echinda
C) Pteropus
D) Lemur
Correct Answer: Echinda
Q. 51) Which animal phylum is latest by discovery?
(WBCS Preliminary Exam: 2017)
A) Pogonophora
B) Kinnorhyncha
C) Loricifera
D) Ctenophora
Correct Answer: Loricifera
Q. 52) Example of modified underground stem is
(WBCS Preliminary Exam: 2017)
A) Carrot
B) Potato
C) Groundnut
D) Turnip
Correct Answer: Potato
Q. 53) Crossing over occurs during meiosis at
(WBCS Preliminary Exam: 2017)
A) Leptotene
B) Anaphase -I
C) Pachytene
D) Diakinesis
Correct Answer: Pachytene
Q. 54) “Particulate theory of inheritance” proposed by
(WBCS Preliminary Exam: 2017)
A) Charles Darwin
B) Gregor Johann Mendel
C) Herman Muller
D) T. H. Morgan
Correct Answer: Gregor Johann Mendel
Q. 55) What is a bacteriophage
(WBCS Preliminary Exam: 2017)
A) A virus
B) A bacterium
C) A fungus
D) A phagocytic protozoa
Correct Answer: A virus
Q. 56) Nature of stele in primitive vascular plants
(WBCS Preliminary Exam: 2017)
A) Protostele
B) Siphonostele
C) Dictyostele
D) Atactostele
Correct Answer: Protostele
Q. 57) Which process makes direct use of oxygen?
(WBCS Preliminary Exam: 2017)
A) Glycolysis
B) Fermentation
C) Citric Acid Cycle
D) Electron transport
Correct Answer: Electron transport
Q. 58) Antibiotic penicillin is obtained from
(WBCS Preliminary Exam: 2017)
A) Algae
B) Fungi
C) Lichen
D) Angiosperm
Correct Answer: Fungi
Q. 59) National committee on Environmental Planning set up in
(WBCS Preliminary Exam: 2017)
A) 1972
B) 1980
C) 1985
D) 1990
Correct Answer: 1972
Q. 60) Pure red crossed with white yields pink flowers. Example of:
(WBCS Preliminary Exam: 2016)
A) Pseudo dominance
B) Dominance
C) Epistasis
D) Co-dominance
Correct Answer: Incomplete dominance (Note: Option D used in source as Co-dom)
Q. 61) Short day plant with critical 14 hrs flowers when day is:
(WBCS Preliminary Exam: 2016)
A) 15 hours
B) 18 hours
C) 12 hours
D) 16 hours
Correct Answer: 12 hours
Q. 62) An endobiotic fungus is:
(WBCS Preliminary Exam: 2016)
A) Agaricus
B) Morchella
C) Synchytrium
D) Polyporus
Correct Answer: Synchytrium
Q. 63) Gynobasic style is present in family:
(WBCS Preliminary Exam: 2016)
A) Mawaceae
B) Solanaceae
C) Labiatae
D) Orchidaceae
Correct Answer: Labiatae
Q. 64) ‘Globule’ and ‘Nucule’ is found in:
(WBCS Preliminary Exam: 2016)
A) Oedogonium
B) Rhizopus
C) Calamites
D) Chara
Correct Answer: Chara
Q. 65) Spindle fibres are made up of:
(WBCS Preliminary Exam: 2016)
A) Flagellin
B) Tubulin
C) Cellulose
D) Chitin
Correct Answer: Tubulin
Q. 66) A carcinoma is a cancer originating from:
(WBCS Preliminary Exam: 2016)
A) Epithelial tissue
B) Connective tissue
C) Muscular tissue
D) Nerve tissue
Correct Answer: Epithelial tissue
Q. 67) A muscle that is consciously controlled:
(WBCS Preliminary Exam: 2016)
A) Striated voluntary
B) Striated involuntary
C) Non-striated vol
D) Non-striated invol
Correct Answer: Striated voluntary
Q. 68) Grub is the larva of
(WBCS Preliminary Exam: 2016)
A) Insects
B) Crustacea
C) Beetle
D) Sponges
Correct Answer: Beetle
Q. 69) Two species cannot occupy the same:
(WBCS Preliminary Exam: 2016)
A) Biome
B) Habitat
C) Territory
D) Niche
Correct Answer: Niche
Q. 70) Target tissue of insulin is:
(WBCS Preliminary Exam: 2016)
A) Red Blood Cell
B) Kidney tissues
C) Intestinal tissues
D) None of the above
Correct Answer: None of the above (Liver/Muscle)
Q. 71) Pollen from anther to stigma of same flower:
(WBCS Preliminary Exam: 2015)
A) Allogamy
B) Geitenogamy
C) Xenogamy
D) Autogamy
Correct Answer: Autogamy
Q. 72) Pyrimidine bases in a DNA are:
(WBCS Preliminary Exam: 2015)
A) A and G
B) T and A
C) C and G
D) T and C
Correct Answer: Thymine and Cytosine
Q. 73) Which one of the following is the natural auxin?
(WBCS Preliminary Exam: 2015)
A) NAA
B) IAA
C) 2, 4-D
D) IBA
Correct Answer: IAA
Q. 74) During cell division, DNA synthesis takes place in
(WBCS Preliminary Exam: 2015)
A) Interphase
B) Anaphase
C) Prophase
D) Telophase
Correct Answer: Interphase
Q. 75) In monohybrid cross, F1 were all tall because of:
(WBCS Preliminary Exam: 2015)
A) Co-dominance
B) Dominance
C) Incomplete dom
D) Epistasis
Correct Answer: Dominance
Q. 76) Cerebral Malaria is caused by
(WBCS Preliminary Exam: 2015)
A) P. vivax
B) P. malariae
C) P. falciparum
D) None of the above
Correct Answer: Plasmodium falciparum
Q. 77) “Natural Selection” theory is from
(WBCS Preliminary Exam: 2015)
A) G. J. Mendel
B) Charles Darwin
C) T. H. Morgan
D) None of the above
Correct Answer: Charles Darwin
Q. 78) Coal, Petroleum and Natural Gas are
(WBCS Preliminary Exam: 2015)
A) Fossil Fuels
B) Cryogenic Fuels
C) Indigenous Fuels
D) Radioactive Fuels
Correct Answer: Fossil Fuels
Q. 79) ‘Tasar’ silk fiber is produced by
(WBCS Preliminary Exam: 2015)
A) Antheraea mylitta
B) Bombyx mori
C) Philosomia ricini
D) A. assamensis
Correct Answer: Antheraea mylitta
Q. 80) One turn of DNA helix measures
(WBCS Preliminary Exam: 2015)
A) 34A°
B) 3.4A°
C) 24A°
D) 44A°
Correct Answer: 34A°
Q. 81) Phenotypic ratio of Mendelian Dihybrid cross
(WBCS Preliminary Exam: 2015)
A) 9 : 3 : 3 : 1
B) 1 : 1 : 1 : 1
C) 3 : 4 : 3 : 1
D) 1 : 2 : 1 : 1
Correct Answer: 9 : 3 : 3 : 1
Q. 82) Cranial nerve in mammals are
(WBCS Preliminary Exam: 2015)
A) 10 pairs
B) 10
C) 12 pairs
D) 12
Correct Answer: 12 pairs
Q. 83) Mitosis stage where chromosomes become V, J, L or I shaped?
(WBCS Preliminary Exam: 2014)
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
Correct Answer: Anaphase
Q. 84) Digested food is absorbed in
(WBCS Preliminary Exam: 2014)
A) Stomach
B) Small Intestine
C) Large Intestine
D) Colon
Correct Answer: Intestine (small)
Q. 85) Rhizome is a modified stem because
(WBCS Preliminary Exam: 2014)
A) grows upward
B) has nodes/eyes
C) stem is disc like
D) nodes/internodes/scales
Correct Answer: it has nodes, internodes and has brown, scaly leaves
Q. 86) The longest cell in animals is
(WBCS Preliminary Exam: 2014)
A) Nerve cell
B) Hepatocyte
C) Blood cell
D) Muscle cell
Correct Answer: Nerve cell
Q. 87) Identifying features of carrot roots are
(WBCS Preliminary Exam: 2014)
A) Conical with small roots
B) Conical without small
C) Round with small
D) Irregular
Correct Answer: Conical with small roots
Q. 88) Which is a protein deficiency disease?
(WBCS Preliminary Exam: 2014)
A) Pellagra
B) Ricket
C) Kwashiorkor
D) Retinoblastoma
Correct Answer: Kwashiorkor
Q. 89) Which disease is caused by fungus?
(WBCS Preliminary Exam: 2014)
A) Polio
B) Malaria
C) Dermatitis
D) Cholera
Correct Answer: Dermatitis
Q. 90) Clove is obtained from
(WBCS Preliminary Exam: 2014)
A) Root
B) Stem
C) Leaf
D) Flower bud
Correct Answer: Flower bud
Q. 91) Which one of the following is not a true fruit?
(WBCS Preliminary Exam: 2014)
A) Date
B) Plum
C) Apple
D) Grape
Correct Answer: Apple
Q. 92) AIDS is caused by
(WBCS Preliminary Exam: 2014)
A) Bacteria
B) Virus
C) Protozoa
D) Helminth
Correct Answer: Virus
Q. 93) Monocotyledonous plants feature:
(WBCS Preliminary Exam: 2014)
A) Reticulate venation
B) Tap root system
C) Trimerous flowers
D) Perennial growth
Correct Answer: Flowers are trimerous
Q. 94) Triple fusion is required for the formation of —
(WBCS Preliminary Exam: 2013)
A) Embryo
B) Endosperm
C) Suspensor
D) Pericarp
Correct Answer: Endosperm
Q. 95) Forestation prevents
(WBCS Preliminary Exam: 2013)
A) Soil erosion
B) Pollution
C) Flood
D) All of the above
Correct Answer: All of the above
Q. 96) Oil is obtained from the endosperm of —
(WBCS Preliminary Exam: 2013)
A) Groundnut
B) Coconut
C) Mustard
D) Sesame
Correct Answer: Coconut
Q. 97) Number of cervical vertebrae in mammal is —
(WBCS Preliminary Exam: 2013)
A) Seven
B) Seventeen
C) Seventy seven
D) Eleven
Correct Answer: Seven
Q. 98) Limbless Amphibians belong to order —
(WBCS Preliminary Exam: 2013)
A) Urodela
B) Anura
C) Gymnophiona
D) None
Correct Answer: Gymnophiona
Q. 99) Birds differ from bats in absence of —
(WBCS Preliminary Exam: 2013)
A) Warm blood
B) 4 chambered heart
C) Trachea
D) Diaphragm
Correct Answer: Diaphragm
Q. 100) Carapace covering gill of prawn is —
(WBCS Preliminary Exam: 2013)
A) Bronchus
B) Branchiostegal membrane
C) Branchiostegite
D) Branchiostegal spine
Correct Answer: Branchiostegite
Q. 101) Rich source of amylase?
(WBCS Preliminary Exam: 2013)
A) Brain
B) Blood
C) Thyroid
D) Pancreas
Correct Answer: Pancreas
Q. 102) Adult Filaria worms live in human
(WBCS Preliminary Exam: 2012)
A) Blood
B) Lymphatics
C) Liver
D) Intestine
Correct Answer: Lymphatics
Q. 103) Disease caused due to lack of ADH
(WBCS Preliminary Exam: 2012)
A) Diabetes insipidus
B) Diabetes mellitus
C) Grave’s disease
D) Cushing’s disease
Correct Answer: Diabetes insipidus
Q. 104) Animal group not found in marine water
(WBCS Preliminary Exam: 2012)
A) Mammals
B) Amphibian
C) Reptiles
D) Aves
Correct Answer: Amphibian
Q. 105) Normal human blood is
(WBCS Preliminary Exam: 2012)
A) Acidic
B) Alkaline
C) Neutral
D) Variable
Correct Answer: Alkaline
Q. 106) The non-poisonous snake is :
(WBCS Preliminary Exam: 2012)
A) Viper
B) Krait
C) Python
D) Coral Snake
Correct Answer: Python
Q. 107) Which one of the following is a viral disease?
(WBCS Preliminary Exam: 2012)
A) Trypanosomiasis
B) Giardiasis
C) Encephalitis
D) Oriental sore
Correct Answer: Encephalitis
Q. 108) Xylem tissue is mainly concerned with:
(WBCS Preliminary Exam: 2012)
A) Photosynthesis
B) Water/Mineral transport
C) Food storage
D) Enzyme transport
Correct Answer: Transport of water and mineral nutrients in plants
Q. 109) ‘Theory of Natural Selection’ proposed by
(WBCS Preliminary Exam: 2012)
A) J. B. S Haldane
B) G. J. Mendel
C) A. I. Oparin
D) C. R Darwin
Correct Answer: C. R Darwin
Q. 110) Enzyme ‘DNA gyrase’ is associated with:
(WBCS Preliminary Exam: 2012)
A) Protein synthesis
B) DNA replication
C) Lipid biosynthesis
D) DNA damage
Correct Answer: DNA replication
Q. 111) Body not differentiated into root/stem/leaves in
(WBCS Preliminary Exam: 2012)
A) Pteridophytes
B) Angiosperms
C) Gymnosperms
D) Algae
Correct Answer: Algae
Q. 112) Total mass of all organisms in an area
(WBCS Preliminary Exam: 2012)
A) Biome
B) Biomass
C) Biomarer
D) Biosensor
Correct Answer: Biomass
Q. 113) Which one is an endemic plant?
(WBCS Preliminary Exam: 2011)
A) Quercus Incana
B) Eleusine Coracana
C) Phoenix Paludosa
D) Kydia Calycina
Correct Answer: Phoenix Paludosa
Q. 114) Name one rootless plant
(WBCS Preliminary Exam: 2011)
A) Ceratophyllum
B) Eichhornia
C) Monochoria
D) Pistia
Correct Answer: Ceratophyllum
Q. 115) Watson and Crick discovered:
(WBCS Preliminary Exam: 2011)
A) Life history P. Vivax
B) Vaccinia
C) Structure of DNA
D) Antibodies
Correct Answer: Structure of DNA
Q. 116) Nerve cells originate from embryonic
(WBCS Preliminary Exam: 2011)
A) Ectoderm
B) Endoderm
C) Mesoderm
D) Both endo/meso
Correct Answer: Ectoderm
Q. 117) Number of amino acids in nature is
(WBCS Preliminary Exam: 2011)
A) 10
B) 20
C) 30
D) 40
Correct Answer: 20
Q. 118) Which is an unlatching group?
(WBCS Preliminary Exam: 2011)
A) Cray/Cuttle/Hag fish
B) Star/Urchin/Cucumber
C) Cockroach/Crab/Spider
D) Whale/Lizard/Frog
Correct Answer: Star fish, sea urchin and sea cucumber
Q. 119) Cell size seen with unaided eye
(WBCS Preliminary Exam: 2011)
A) 1 micron
B) 10 microns
C) 100 microns
D) 1000 microns
Correct Answer: 100 microns
Q. 120) Gastric glands produce enzyme
(WBCS Preliminary Exam: 2011)
A) Insulin
B) Ptyalin
C) Pepsin
D) Trypsin
Correct Answer: Pepsin
Q. 121) Which of the following is a terrestrial algae?
(WBCS Preliminary Exam: 2011)
A) Chlorella
B) Trentepohlia
C) Spirullina
D) Sargassum
Correct Answer: Trentepohlia
Q. 122) Kranz anatomy states that, plant has
(WBCS Preliminary Exam: 2011)
A) C3 cycle
B) C4 cycle
C) C2 cycle
D) Both C3 and C4
Correct Answer: C4 cycle
Q. 123) Essential constituent of plant cells is
(WBCS Preliminary Exam: 2011)
A) Cellulose
B) Sucrose
C) Starch
D) Lignin
Correct Answer: Cellulose
Q. 124) The gene for Haemophilia is
(WBCS Preliminary Exam: 2010)
A) X-linked recessive
B) X-linked dominant
C) Y-linked
D) Autosome
Correct Answer: X-linked recessive
Q. 125) Narrow portion between uterus and vagina
(WBCS Preliminary Exam: 2010)
A) Clitoris
B) Urethra
C) Oviduct
D) Cervix
Correct Answer: Cervix
Q. 126) Toxic chemical causing Minamata disease
(WBCS Preliminary Exam: 2010)
A) Uranium
B) Mercury
C) Cadmium
D) Arsenic
Correct Answer: Mercury
Q. 127) Forest Protection Committees consist of
(WBCS Preliminary Exam: 2010)
A) Forest Guards
B) Panchayat Members
C) Villagers/Dept/Panchayat
D) Dept officials
Correct Answer: Forest Villages, Forest Department and Panchayat
Q. 128) Vegetative body of moss represents
(WBCS Preliminary Exam: 2010)
A) Sporophyte
B) Gametophyte
C) Either
D) Both
Correct Answer: Gametophyte
Q. 129) Enzymes speed up reactions by
(WBCS Preliminary Exam: 2010)
A) Increasing activation E
B) Lowering Temp
C) Increasing Temp
D) Lowering activation E
Correct Answer: Lowering the activation energy of the reaction
Q. 130) Cardiac muscles do not fatigue due to
(WBCS Preliminary Exam: 2010)
A) Intercalated discs
B) Numerous mitochondria
C) More actins
D) More myosin
Correct Answer: Having numerous mitochondria
Q. 131) ‘Light reaction’ takes place in
(WBCS Preliminary Exam: 2010)
A) Cytosol
B) Grana
C) Stroma
D) Ribosome
Correct Answer: Grana of Chloroplast
Q. 132) Haversian system is a part of
(WBCS Preliminary Exam: 2010)
A) Kidney
B) Bone
C) Heart
D) Brain
Correct Answer: Bone
Q. 133) Polytene chromosome is found in
(WBCS Preliminary Exam: 2010)
A) Salivary gland flies
B) Liver of man
C) Neuron insects
D) None
Correct Answer: Salivary gland of larvae of flies
Q. 134) Sunken stomata indicates:
(WBCS Preliminary Exam: 2010)
A) Hydrophytes
B) Xerophytes
C) Halophytes
D) Mesophytes
Correct Answer: Xerophytes
Q. 135) Carbohydrate used in silvering mirrors
(WBCS Preliminary Exam: 2010)
A) Sucrose
B) Fructose
C) Cellulose
D) Glucose
Correct Answer: Glucose
Q. 136) Metal ion responsible for electron transport
(WBCS Preliminary Exam: 2010)
A) Sodium
B) Potassium
C) Cobalt
D) Iron
Correct Answer: Iron
Q. 137) ‘DNA sequencing’ technique discovered by
(WBCS Preliminary Exam: 2010)
A) H. G. Khorana
B) Watson and Crick
C) Frederick Sanger
D) E. M. Southern
Correct Answer: Frederick Sanger
Q. 138) A Cladogram depicts
(WBCS Preliminary Exam: 2010)
A) Evolutionary relation
B) Phenatic relation
C) Genetic relation
D) Taxonomic relation
Correct Answer: Evolutionary relationship
Q. 139) AIDS/HIV virus is a type of
(WBCS Preliminary Exam: 2010)
A) DNA virus
B) RNA virus
C) Either
D) Both
Correct Answer: RNA virus
Q. 140) Cytosol plays a role in
(WBCS Preliminary Exam: 2010)
A) Oxidative phosph
B) Pyruvic decarbox
C) Krebs cycle
D) Glycolysis
Correct Answer: Glycolysis
Q. 141) Coastal Regulation Zones identified by:
(WBCS Preliminary Exam: 2010)
A) Tidal Height
B) Sea Level Rise
C) Depth of Water
D) Bathymetry
Correct Answer: Tidal Height
Q. 142) How much percent of human body is water?
(WBCS Preliminary Exam: 2009)
A) 66
B) 50
C) 33
D) 10
Correct Answer: 66
Q. 143) Iodine is for patients suffering from
(WBCS Preliminary Exam: 2009)
A) Goitre
B) Night blindness
C) Ricket
D) Rheumatism
Correct Answer: Goitre
Q. 144) Vitamin C is
(WBCS Preliminary Exam: 2009)
A) Tocopherol
B) Cyanocobalamin
C) Ascorbic acid
D) Thiamine
Correct Answer: Ascorbic acid
Q. 145) Greenhouse effect is caused by too much
(WBCS Preliminary Exam: 2009)
A) Carbon di-oxide
B) Ammonia
C) Water vapour
D) Dust particles
Correct Answer: Carbon di-oxide
Q. 146) Edible portion of coconut is
(WBCS Preliminary Exam: 2009)
A) Fruit wall
B) Endosperm
C) Cotyledon
D) Embryo
Correct Answer: Endosperm
Q. 147) Quinine is obtained from Cinchona:
(WBCS Preliminary Exam: 2009)
A) Seed
B) Leaf
C) Flower
D) Bark
Correct Answer: Bark
Q. 148) Agent Orange used in Vietnam War to:
(WBCS Preliminary Exam: 2009)
A) Destroy Crops
B) Pollute Air
C) Reveal hiding places
D) Start fire
Correct Answer: Remove leaves and reveal enemy hiding places
Q. 149) Malaria Parasite obtained from blood:
(WBCS Preliminary Exam: 2009)
A) 1 hr before rise
B) 5 hrs after
C) When temp rise/rigor
D) Any time
Correct Answer: When temperature rise with rigor
Q. 150) Vitamin in acyl-COA dehydrogenase:
(WBCS Preliminary Exam: 2009)
A) Nicotinic acid
B) Pyridoxine
C) Pantothenic acid
D) Riboflavin
Correct Answer: Riboflavin
Q. 151) Excretory organ of prawn
(WBCS Preliminary Exam: 2009)
A) Salivary gland
B) Green gland
C) Ink gland
D) Malpighian tubule
Correct Answer: Green gland
Q. 152) Ruminant Stomach is possessed by
(WBCS Preliminary Exam: 2009)
A) Cow
B) Dog
C) Pigeon
D) Cameleon
Correct Answer: Cow
Q. 153) Rhinoceros indica in Wildlife Act:
(WBCS Preliminary Exam: 2009)
A) Schedule I
B) Schedule II
C) Schedule III
D) None
Correct Answer: Schedule I
Q. 154) Silk from Antheraea assamensis
(WBCS Preliminary Exam: 2009)
A) Tasar
B) Munga
C) Eri
D) Mulberry silk
Correct Answer: Munga
Q. 155) Convention for wetland conservation?
(WBCS Preliminary Exam: 2009)
A) Earth Sumit
B) Ramsar Convention
C) Belem Declaration
D) Botanical Congress
Correct Answer: Ramsar Convention
Q. 156) Blood pumped by adult heart per hour
(WBCS Preliminary Exam: 2008)
A) 150 litre
B) 200 litre
C) 300 litre
D) 340 litre
Correct Answer: 340 litre
Q. 157) Bacterium differs from virus with
(WBCS Preliminary Exam: 2008)
A) DNA
B) RNA
C) Both RNA and DNA
D) None
Correct Answer: Both RNA and DNA
Q. 158) Instrument for blood pressure
(WBCS Preliminary Exam: 2008)
A) Barometer
B) Sphygmomanometer
C) Tonometer
D) None
Correct Answer: Sphygmomanometer
Q. 159) Energy in ecosystem is flow because
(WBCS Preliminary Exam: 2008)
A) Multi-directional
B) Denominator
C) One way indirection
D) None
Correct Answer: Energy transformations are one way indirection
Q. 160) Complete loss of memory
(WBCS Preliminary Exam: 2008)
A) Trauma
B) Amnesia
C) Coma
D) Paramnesia
Correct Answer: Amnesia
Q. 161) Ingredient assisting clotting
(WBCS Preliminary Exam: 2008)
A) Vitamin A
B) Folic acid
C) Vitamin D
D) Vitamin K
Correct Answer: Vitamin K
Q. 162) Causative organism of malignant malaria
(WBCS Preliminary Exam: 2008)
A) P. vivax
B) P. falciparum
C) P. malarie
D) P. ovale
Correct Answer: Plasmodium falciparum
Q. 163) Nitrogen base absent in DNA
(WBCS Preliminary Exam: 2008)
A) Uracil
B) Adenine
C) Thymine
D) Cytosine
Correct Answer: Uracil
Q. 164) Occipital area of brain produces
(WBCS Preliminary Exam: 2008)
A) Vision
B) Taste
C) Motion
D) Touch
Correct Answer: Vision
Q. 165) Ribosomes play a role in
(WBCS Preliminary Exam: 2008)
A) Photosynthesis
B) Protein synthesis
C) Lipid synthesis
D) Respiration
Correct Answer: Protein synthesis
Q. 166) Greenhouse gases trap heat of:
(WBCS Preliminary Exam: 2008)
A) Ultraviolet
B) Infrared
C) Solar
D) Both A and B
Correct Answer: Infrared
Q. 167) Name of a insectivorous plant
(WBCS Preliminary Exam: 2008)
A) Gulancha
B) Nayantara
C) Basak
D) Pitcher Plant
Correct Answer: Pitcher Plant
Q. 168) Which of the following is not a stimulant?
(WBCS Preliminary Exam: 2008)
A) Caffeine
B) Barbiturates
C) Cocaine
D) Amphetamines
Correct Answer: Barbiturates
Q. 169) Cancer is caused by activation of
(WBCS Preliminary Exam: 2008)
A) Regulatory genes
B) Oncogenes
C) Structural genes
D) Jumping genes
Correct Answer: Oncogenes
Q. 170) Parkinson’s is loss of cells in
(WBCS Preliminary Exam: 2008)
A) Cingulate cortex
B) Substantia nigra
C) Reticular formation
D) Cerebral cortex
Correct Answer: Substantia nigra
Q. 171) Flowers without petals pollinated by
(WBCS Preliminary Exam: 2008)
A) Bees
B) Birds
C) Butterflies
D) Wind
Correct Answer: Wind
Q. 172) RNA of retrovirus produces DNA by
(WBCS Preliminary Exam: 2008)
A) DNA polymerase
B) RNA polymerase
C) Endonuclease
D) Reverse transcriptase
Correct Answer: Reverse transcriptase
Q. 173) Intermediate host of Leishmania
(WBCS Preliminary Exam: 2008)
A) Sand fly
B) Tse-tse fly
C) Dragon fly
D) Anopheles
Correct Answer: Sand fly
Q. 174) Phyto-hormone for senescence
(WBCS Preliminary Exam: 2007)
A) Cytokinin
B) Auxin
C) Gibberellin
D) Ethylene
Correct Answer: Ethylene
Q. 175) Not a hereditary disease in man?
(WBCS Preliminary Exam: 2007)
A) Hemophilia
B) Color blindness
C) Alzheimer’s disease
D) Down’s syndrome
Correct Answer: Alzheimer’s disease
Q. 176) Ecological niche is
(WBCS Preliminary Exam: 2007)
A) Biotic comp
B) Abiotic comp
C) both (A) and (B)
D) None
Correct Answer: Both (A) and (B)
Q. 177) A virion is
(WBCS Preliminary Exam: 2007)
A) Infective particle
B) Infective phage
C) Infective stage
D) None
Correct Answer: Infective particle of virus
Q. 178) Substance contributing most to greenhouse
(WBCS Preliminary Exam: 2007)
A) Carbon di-oxide
B) Hydrogen fluoride
C) Carbon monoxide
D) Sulphur di-oxide
Correct Answer: Carbon di-oxide
Q. 179) A peduncle is a
(WBCS Preliminary Exam: 2007)
A) Stalk of flower
B) Stalk of a leaf
C) Stalk of a fruit
D) None
Correct Answer: Stalk of flower
Q. 180) Kala-azar spread by bite of
(WBCS Preliminary Exam: 2007)
A) Culex
B) Phlebotomus sand-fly
C) Bed-bug
D) Mite
Correct Answer: Phlebotomus sand-fly
Q. 181) Genetic make-up of normal human male
(WBCS Preliminary Exam: 2007)
A) XY
B) XO
C) XX
D) XXO
Correct Answer: XY Chromosomes
Q. 182) Which is a polymorphic species?
(WBCS Preliminary Exam: 2007)
A) Garden lizard
B) Spider
C) Gorilla
D) Ant
Correct Answer: Ant
Q. 183) Producer in a pond ecosystem?
(WBCS Preliminary Exam: 2007)
A) Phytoplankton
B) Zooplankton
C) Herbivores
D) Carnivores
Correct Answer: Phytoplankton
Q. 184) Plant virus causing vegetable disease
(WBCS Preliminary Exam: 2007)
A) TMV
B) Cauliflower Mosaic
C) Adenovirus
D) None
Correct Answer: Cauliflower Mosaic virus
Q. 185) Chemically Sporopollenin is a
(WBCS Preliminary Exam: 2007)
A) Co-polymer carot/FA
B) Carbohydrate
C) Protein
D) Lactic acid
Correct Answer: Co-polymer of carotenoids & fatty acid
Q. 186) In plants, the receptor for detecting photoperiodism is
(WBCS Preliminary Exam: 2006)
A) Sensory cell
B) Sensory organelles
C) Protein molecule
D) Gradient of K
Correct Answer: Protein molecule (Phytochrome)
Q. 187) Urea is produced in the body of man in
(WBCS Preliminary Exam: 2006)
A) Liver
B) Urinary Bladder
C) Kidney
D) Hemoglobin
Correct Answer: Liver
Q. 188) Fruit fall can be prevented by spraying
(WBCS Preliminary Exam: 2006)
A) IAA
B) Abscisic acid
C) Cytokinin
D) NAA
Correct Answer: NAA (Naphthalene Acetic Acid)
Q. 189) Restriction enzymes are synthesized by
(WBCS Preliminary Exam: 2006)
A) All eukaryotic cells
B) Yeast and bacteria
C) Bacteria only
D) All cells
Correct Answer: Bacteria only
Q. 190) Primary and Secondary growth are inhibited by
(WBCS Preliminary Exam: 2006)
A) Auxin
B) Gibberelins
C) Abscisic acid
D) Cytokinins
Correct Answer: Abscisic acid
Q. 191) Cross between pure yellow and pure green peas, how many different eggs by F1?
(WBCS Preliminary Exam: 2006)
A) 1
B) 2
C) 4
D) 8
Correct Answer: 2
Q. 192) Connecting link between reptiles and birds is
(WBCS Preliminary Exam: 2006)
A) Archaeopteryx
B) Platypus
C) Java Apeman
D) Whale
Correct Answer: Archaeopteryx
Q. 193) Which of the following is not a kidney function?
(WBCS Preliminary Exam: 2006)
A) Ultra filtration
B) Tubular Reabsorption
C) Tubular Secretion
D) Phagocytosis
Correct Answer: Phagocytosis
Q. 194) Coconut inflorescence is
(WBCS Preliminary Exam: 2006)
A) Racemose
B) Hvpanthodium
C) Cyathium
D) Spadix
Correct Answer: Spadix
Q. 195) Loop of Henle lies in the
(WBCS Preliminary Exam: 2006)
A) Cortex
B) Medulla
C) Renal Pelvis
D) Ureter
Correct Answer: Medulla
Q. 196) A viral disease is
(WBCS Preliminary Exam: 2006)
A) Cancer
B) Leukemia
C) Typhoid
D) Yellow Fever
Correct Answer: Yellow Fever
Q. 197) Which one is not a protozoa?
(WBCS Preliminary Exam: 2006)
A) Hydra
B) Euglena
C) Amoeba
D) Paramaecium
Correct Answer: Hydra
Q. 198) According to Darwin the unit of Natural Selection is
(WBCS Preliminary Exam: 2005)
A) Individual
B) Family
C) Genus
D) Species
Correct Answer: Individual
Q. 199) Plant that keeps stomata open during night and closed during day?
(WBCS Preliminary Exam: 2005)
A) Water Lily
B) Cactus
C) Sun flower
D) Fern
Correct Answer: Cactus
Q. 200) The main function of norepinephrine is to
(WBCS Preliminary Exam: 2005)
A) increase blood pressure
B) increase urine
C) increase respiration
D) release epinephrine
Correct Answer: increase blood pressure
Q. 201) Which plant tissues are composed of dead cells?
(WBCS Preliminary Exam: 2005)
A) Xylem
B) Phloem
C) Parenchyma
D) Hypodermis
Correct Answer: Xylem
Q. 202) Blood group person called a universal donor?
(WBCS Preliminary Exam: 2005)
A) A
B) B
C) AB
D) O
Correct Answer: O
Q. 203) The largest reservoir of Nitrogen on Earth is
(WBCS Preliminary Exam: 2005)
A) Soil
B) Air
C) Ocean
D) Rock
Correct Answer: Air
Q. 204) According to cellular structure which is most complex?
(WBCS Preliminary Exam: 2005)
A) Bacteria
B) Protozoa
C) Algae
D) Fungi
Correct Answer: Fungi
Q. 205) Plants store glucose in the form of
(WBCS Preliminary Exam: 2005)
A) Monosaccharide
B) Cellulose
C) Starch
D) Glycogen
Correct Answer: Starch
Q. 206) Amount of blood in the circulatory system of a man is
(WBCS Preliminary Exam: 2005)
A) one litre
B) two litres
C) five litres
D) ten litres
Correct Answer: five litres
Q. 207) How many amino acids are considered essential?
(WBCS Preliminary Exam: 2005)
A) Six
B) Nine
C) Twelve
D) Fourteen
Correct Answer: Nine
Q. 208) Cholesterol is a/an
(WBCS Preliminary Exam: 2005)
A) Saturated fat
B) Unsaturated fat
C) Steroid
D) Diglyceride
Correct Answer: Steroid
Q. 209) Animal possessing the least number of body segments?
(WBCS Preliminary Exam: 2005)
A) Flatworm
B) Earthworm
C) Prawn
D) Cockroach
Correct Answer: Cockroach
Q. 210) Lysozyme in sweat, saliva, and tears kills
(WBCS Preliminary Exam: 2005)
A) Virus infected cells
B) Protozoa
C) Bacteria
D) Virus
Correct Answer: Bacteria
Q. 211) Antibodies are synthesized by
(WBCS Preliminary Exam: 2005)
A) Bone marrow
B) Plasma and Lymph
C) Liver
D) Kidney
Correct Answer: Plasma and Lymph
Q. 212) First hormone produced by Genetic Engineering is
(WBCS Preliminary Exam: 2005)
A) Estrogen
B) Testosterone
C) Thyroxin
D) Insulin
Correct Answer: Insulin
Q. 213) The scientific name of Vitamin ‘C’ is
(WBCS Preliminary Exam: 2005)
A) Acetic acid
B) Muriatic acid
C) Ascorbic acid
D) Lactic acid
Correct Answer: Ascorbic acid
Q. 214) Pitcher plant is
(WBCS Preliminary Exam: 2003)
A) Autotrophic
B) Heterotrophic
C) Insectivorous
D) Actinomorphic
Correct Answer: Insectivorous
Q. 215) AIDS is
(WBCS Preliminary Exam: 2003)
A) Viral disease
B) Fungal disease
C) Bacterial disease
D) Genetic disease
Correct Answer: Viral disease
Q. 216) Universal donor in blood transfusion refers to
(WBCS Preliminary Exam: 2003)
A) Group A
B) Group B
C) Group AB
D) Group O
Correct Answer: Blood Group O
Q. 217) Scurvy is caused by the deficiency of
(WBCS Preliminary Exam: 2003)
A) Vit. A
B) Vit. B
C) Vit. C
D) Vit. D
Correct Answer: Vit. C
Q. 218) Which becomes zero in a fully turgid cell?
(WBCS Preliminary Exam: 2003)
A) Water potential
B) Wall pressure
C) Osmotic pressure
D) All of the above
Correct Answer: Water potential
Q. 219) Colles’ fracture is associated with
(WBCS Preliminary Exam: 2003)
A) Humerus
B) Radius
C) Ulna
D) Femur
Correct Answer: Radius
Q. 220) Septicemia is
(WBCS Preliminary Exam: 2003)
A) Food poisoning
B) Blood poisoning
C) Mental disorder
D) None
Correct Answer: Blood poisoning
Q. 221) Malaria is caused by
(WBCS Preliminary Exam: 2003)
A) Plasmodium
B) Anopheles mosquito
C) Culex mosquito
D) Bad air
Correct Answer: Plasmodium
Q. 222) Following animal has a similar vision as we have
(WBCS Preliminary Exam: 2003)
A) Crow
B) Owl
C) Horse
D) Pigeon
Correct Answer: Owl
Q. 223) The genetic information is carried by
(WBCS Preliminary Exam: 2003)
A) Protein
B) Fatty acids
C) Nuclear acids
D) Carbohydrate
Correct Answer: Nuclear acids (DNA/RNA)
Q. 224) Hardest substance in the human body?
(WBCS Preliminary Exam: 2003)
A) Bone
B) Enamel
C) Dentine
D) Nail
Correct Answer: Enamel
Q. 225) Following animal is called a friend of farmer:
(WBCS Preliminary Exam: 2003)
A) Cow
B) Earthworm
C) Rhizobium
D) Honey-bee
Correct Answer: Earthworm
Q. 226) During photosynthesis,
(WBCS Preliminary Exam: 2002)
A) O2 is essential
B) Catabolic reaction
C) Light stored as chemical
D) Chemical released as heat
Correct Answer: Light energy is stored as potential chemical energy in the food
Q. 227) Connecting link between Reptiles and Mammals?
(WBCS Preliminary Exam: 2002)
A) Peripatus
B) Lung fish
C) Duckbill platypus
D) Archaeopteryx
Correct Answer: Duckbill platypus
Q. 228) Fixation of nitrogen is meant
(WBCS Preliminary Exam: 2002)
A) Liquefaction
B) Conversion to compound
C) Manufacture from air
D) Conversion to nitric acid
Correct Answer: Conversion of atmospheric nitrogen into a useful compound
Q. 229) Which one of the following is not an endocrine gland?
(WBCS Preliminary Exam: 2002)
A) Adrenal
B) Pituitary
C) Salivary
D) Thyroid
Correct Answer: Salivary gland
Q. 230) Person associated with the Chipko movement
(WBCS Preliminary Exam: 2002)
A) Baba Amte
B) Sunderlal Bahuguna
C) Medha Patkar
D) Arundhuti Roy
Correct Answer: Sunderlal Bahuguna
Q. 231) Normal leaves are called
(WBCS Preliminary Exam: 2002)
A) Seed leaves
B) Flora leaves
C) Foliage leaves
D) Scale leaves
Correct Answer: Foliage leaves
Q. 232) The roots of a tree are
(WBCS Preliminary Exam: 2002)
A) Negatively geotropic
B) Positively geotropic
C) Positively phototropic
D) Negatively hydrotropic
Correct Answer: Positively geotropic
Q. 233) Majority of animal viruses contain
(WBCS Preliminary Exam: 2002)
A) DNA
B) RNA
C) RNA and DNA
D) None of DNA
Correct Answer: DNA
Q. 234) In which part of the human body, urea is produced?
(WBCS Preliminary Exam: 2002)
A) Kidneys
B) Liver
C) Pancreas
D) Urinary bladder
Correct Answer: Liver
Q. 235) Vitamin most easily destroyed by heat and air?
(WBCS Preliminary Exam: 2002)
A) A
B) B
C) C
D) D
Correct Answer: C
Q. 236) Refrigeration helps in food preservation by
(WBCS Preliminary Exam: 2002)
A) Killing bacteria
B) Retarding reaction rates
C) Covering with ice
D) Stopping enzyme
Correct Answer: Greatly retarding the rates of biochemical reaction
Q. 237) Which of the following is an infectious bacterial disease?
(WBCS Preliminary Exam: 2002)
A) Conjunctivitis
B) Diphtheria
C) Influenza
D) Measles
Correct Answer: Diphtheria
Q. 238) The image of an object formed on the retina is
(WBCS Preliminary Exam: 2001)
A) Virtual and erect
B) real and erect
C) Virtual and inverted
D) real and inverted
Correct Answer: real and inverted
Q. 239) Erosion of soil by winds controlled by
(WBCS Preliminary Exam: 2001)
A) afforestation
B) removal of vegetation
C) dry farming
D) creation of wind breaks
Correct Answer: afforestation
Q. 240) Chlorine is not a constituent of
(WBCS Preliminary Exam: 2001)
A) DDT
B) chlorophyll
C) chloroform
D) bleaching powder
Correct Answer: chlorophyll
Q. 241) Lysine is an essential amino acid because
(WBCS Preliminary Exam: 2001)
A) it is very rare
B) constituent of all proteins
C) high nutritive value
D) not formed in body
Correct Answer: it is not formed in the body and has to be provided through food
Q. 242) _____ is an antivitamin.
(WBCS Preliminary Exam: 2001)
A) beta carotene
B) methylcobalamin
C) pyrithiamine
D) folic acid
Correct Answer: pyrithiamine
Q. 243) Which part of ear maintains the balance of our body?
(WBCS Preliminary Exam: 2001)
A) otolith
B) malleus
C) tympanic membrane
D) cochlea
Correct Answer: otolith
Q. 244) Which one of the following is a protozoa?
(WBCS Preliminary Exam: 2001)
A) Pea mosaic
B) E. histolytica
C) Yeast
D) Variola
Correct Answer: Entamoeba histolytica
Q. 245) Disease caused by a deficiency of vitamin B12
(WBCS Preliminary Exam: 2001)
A) aplastic anaemia
B) sickle cell anaemia
C) normocytic anaemia
D) pernicious anaemia
Correct Answer: pernicious anaemia
Q. 246) National Wildlife Action Plan adopted by India in
(WBCS Preliminary Exam: 2001)
A) 1963
B) 1973
C) 1983
D) 1993
Correct Answer: 1983
Q. 247) Closest distance a normal person can clearly see is
(WBCS Preliminary Exam: 2000)
A) 10 cm
B) 50 cm
C) 80 cm
D) 25 cm
Correct Answer: 25 cm
Q. 248) Which one of the following is not an autotrophy?
(WBCS Preliminary Exam: 2000)
A) Grass
B) Green Algae
C) Fungus
D) Fern
Correct Answer: Fungus
Q. 249) Photosynthetic plants store glucose as
(WBCS Preliminary Exam: 2000)
A) Sucrose
B) Starch
C) Cellulose
D) Glycogen
Correct Answer: Starch
Q. 250) Present concept of evolution, the unit of evolution is
(WBCS Preliminary Exam: 2000)
A) Individual
B) Families
C) Population
D) Species
Correct Answer: Population
Q. 251) Which one of the following is a Reptile?
(WBCS Preliminary Exam: 2000)
A) Salamander
B) Turtle
C) Newt
D) Shark
Correct Answer: Turtle
Q. 252) Insufficiency of which ion causes chlorosis?
(WBCS Preliminary Exam: 2000)
A) Sodium
B) Phosphorus
C) Calcium
D) Magnesium
Correct Answer: Magnesium
Q. 253) A red blood cell lives for about
(WBCS Preliminary Exam: 2000)
A) One week
B) One month
C) Four months
D) One year
Correct Answer: Four months (approx. 120 days)
Q. 254) Solar energy absorbed by leaves in photosynthesis is
(WBCS Preliminary Exam: 2000)
A) 1%
B) 10%
C) 30%
D) 50%
Correct Answer: 1%
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