200+ Biology Previous Year Questions Asked in SSC CGL, Stenographers Grade C & D, MTS and CHSL Exams

200+ Biology Previous Year Questions Asked in SSC CGL, Stenographers Grade C & D, MTS and CHSL Exams

200+ Biology Important Questions SSC CGL, Stenographers Grade C & D, MTS and CHSL Exams

1.Silviculture is the branch of botany in which we study about-
(a) Culture of algae
(b) Development of Forest
(c) Culture of fungi
(d) Siliciphida plant

2.Study of pollen grain is called-
(a) Pomology
(b) Polynology
(c) Phocology

(d) Mycology

3.Study of internal structure of plant-
(a) Morphology
(b) Anatomy
(c) Cology
(d) Taxonomy

4.Estimatin of age of woody plant by counting annual ring is-
(a) Dendrology
(b) Denrochronolgy
(c) Agronomy
(d) Demography

5.Study of growing plant without soil in water containing nutrient is-
(a) Hydrotonics
(b) Hydrophonics
(c) Hypotonics
(d) None

6.In Exo-biology we study about-
(a) External structure of living beings
(b) Life present on the earth
(c) Life present in the other layer of earth atmosphere
(d) Life found in space and on other satellite.

7.Xenobiotics which are inherently resistant to microbial attack are called as-
(a) Biodegradable
(b) All of the given options
(c) Recalcitrant
(d) Persistent

8.Curd is sour due to presence of
(a) Citric Acid
(b) Lactic Acid
(c) Acetic Acid
(d) None of these

9.EBOL is a –
(a) Virus
(b) Bacteria
(c) Protozoa
(d) Fungi

10.Virus that infect bacteria are called
(a) Bacteriophages
(b) Basophils
(c) Basal body
(d) Basidiospores

11.Disease caused by HIV-
(a) Tuberculosis
(b) Cancer
(c) Acquired immune deficiency syndrome
(d) None of these

12.The biggest single- celled organism is
(a) Yeast
(b) Acetabularia
(c) Acetobacter
(d) Amoeba

13.Agar – Agar is obtained from –
(a) Fungi
(b) Algae
(c) Moss
(d) Bacteria

14.Red rot of sugarcane is caused by
(a) Colletotrichum falcatum
(b) Cercospora percoruata
(c) Alternaria alternate
(d) Phylophthora infestans

15.Aflatoxins are produced by–
(a) Fungi
(b) Bacteria
(c) Algae
(d) Viruses

1. In Gymnosperms, seeds are enclosing in side fruits.
2. Dicots and monocots are included in Angiospersm.
(a) Both Statements 1 and 2 are correct.
(b) Both Statements 1 and 2 are incorrect.
(c) Statement 1 is correct, but Statement 2 is incorrect.
(d) Statement 1 is incorrect, but Statement 2 is correct.

17.Which part of the cinchona yields a drug?
(a) Endosperm
(b) Pericarp
(c) Bark
(d) leaf

18.Fiber of cotton is obtain from–
(a) Stem
(b) Seed
(c) Fruit
(d) Root

19.An enzyme produced by HIV that allows the integration of HIV DNA into the host cell’s DNA is -
(a) Integrase
(b) Ligase
(c) Helicase
(d) DNA gyrase

20.Dr. Norman E. Borlaug belonged to-
(a) Spain
(b) Mexico
(c) America
(d) Austria

21.Eye of potato are -
(a) Apical buds
(b) Axillary buds
(c) Adventitous root
(d) Extra axillary bud

22.Ginger is-
(a) Modified root
(b) Modified stem
(c) Modified leaf
(d) Modified bulb

23.Cactus is referred to as-
(a) Hydrophte
(b) Mesophte
(c) Xerophyte
(d) Epiphte

24.Agar – agar is prepared from
(a) Alage
(b) Lichens
(c) Fungi
(d) Bryophyte

25.The inflorescence of wheat is-
(a) Raceme
(b) Catkin
(c) Spike
(d) Panicle

26.Consider the following statements:
(1) Maize can be used for the production of starch
(2) Oil extracted from miaze can be a feedstock fro biodiesel
(3 ) Alcoholic beverages can be produced by using maise.

Which of the statements given above is/ are correct?
(a) 1 only
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1, 2, and 3

27.Double fertilization is main feature of-
(a) Bryophtes
(b) Pteridophytes
(c) Gymnosperm
(d) Angiosperm

28.Parthenogenesis is a process in which-
(a) Fruit develop without hormone
(b) Fruit develop without fertilization
(c) Development of egg without fertilization
(d) Development of embryo without fertilization

29.A fertilized egg is known as-
(a) Oospore
(b) Conidiospre
(c) Zoospore
(d) Zygote

30.Lungs of a plant are-
(a) Leaves
(b) Stems
(c) Flowers
(d) Roots

31.The plant from which cocoa and chocolate are obtained is–
(a) Herb
(b) shrub
(c) Small tree
(d) very big tree

32.Crop shown at the commencement of the monsoon is called-
(a) Rabi crop
(b) Cash crop
(c) Kharif crop
(d) none of these

33.Plant which grow in saline soil are-
(a) Xerophytes
(b) Hydrophytes
(c) Halophytes
(d) Succulents

34.Transpiration in plants is a process of
(a) Photorespiration
(b) Water loss
(c) Food production
(d) Respiration

35.In soil, water that is readily available to plant roots is:
(a) Gravitational water
(b) Capillary water
(c) Hygroscopic water
(d) Bound water

36.Vaseline was applied to both surfaces of the leaves of a plant. Which of the following process/processes would be affected?
1. Photosynthesis
2. Respiration
3. Transpiration
Select the correct answer using the code given below:
(a) 1 and 3 only
(b) 2 only
(c) 2 and 3 only
(d) 1, 2 and 3

37.Wilting of plants occurs due to excessive:
(a) Absorption
(b) Transpiration
(c) Respiration
(d) Guttation

38.The loss of water in the form of water drops is called-
(a) Transpiration
(b) Respiration
(c) Guttation
(d) Ex osmosis

39.Transpiration differs from evopartion in-
(a) Rate of water loss
(b) Transpiration is a physiological process while evaporation is physical process.
(c) Transpiration is physical process while evaporation is a physiological process.
(d) Frequency of water loss.

40.Dwarf plants can be made taller by applying-
(a) Gibberellins
(b) Auxins
(c) Cytokinins
(d) Dormin

41.The oxygen in photosynthesis is released from-
(a) CO2
(b) H2O
(c) Both CO2 & H2O
(d) Chlorophyll

42.Photolysis of water involves-
(a) Excitement of water
(b) Evoluation of oxygen
(c) Breakdown of water by light
(d) Splitting of water into its ion H +and OH-

43.An element present in chlorophyll –
(a) Ca
(b) Fe
(c) Mg
(d) S

44.Respiration is-
(a) Endothermic process
(b) Exothermic process
(c) Anabolic process
(d) Endagenic process

45.Fermentation is –
(a) Anaerobic respiration
(b) Incomplete oxidation of carbohydrate
(c) Complete oxidation carbohydrate
(d) None of above

46.Incomplete break down of sugar in anaerobic respiration form –
(a) Fructose and water
(b) Glucose and CO2
(c) Alcohol and CO2
(d) Water and CO2

47.Respiration is –
(a) Catabolic process that uses carbon dioxide, produce oxygen and converted released energy to ATP
(b) Anabolic process that uses oxygen and carbon dioxide to form ATP
(c) Anabolic process that uses oxygen, piduces carbon dioxide and converts released energy into ATP
(d) Catabolic process that uses oxygen produces carbon dioxide and converts released energy into ATP

48.Harmone helping in cell division-
(a) IAA
(b) NAA
(c) Cytokinn / Seatin
(d) Cibberellin

49.The instrument by which rate of growth of plant is measured-
(a) Hydrometer
(b) Auxanometer
(c) Osmometer
(d) Potometer

50.For the growth in length of plant which of the following is not essential-
(a) Sodium
(b) Calcium
(c) Nitrogen
(d) Phosphorus

51.Example of positive geotropism is-
(a) Closing of flower
(b) Upward growth of stem
(c) Downwards growth of root
(d) Lateral growth of root

52.Leaves of which of the following plants are not used for the rearing of silkworms?
(a) Mulberry
(b) Castor
(c) Oak
(d) Teak

53.Water and mineral in plant is transported through-
(a) Xylem
(b) Phloem
(c) Pith
(d) Cortex

54.Number of stomata is less and sunkin in-
(a) Mesophytes
(b) Halophytes
(c) Hydrophytes
(d) Xerophytes

55.Which of the following is used as rodenticide?
(a) Zinc phosphide
(b) Zinc carbonate
(c) Zinc chloride
(d) Zinc sulphide

56.Red not of sugarcane is caused by-
(a) Calletotrichum falcatum
(b) Cercopspora personata
(c) Alternaria alternata
(d) Phylophthora Infestans

57.Element playing role in nitrogen fixation-
(a) Mn
(b) Mo
(c) Zn
(d) Cu

58.Branch of science which deal with the study of skin of man-
(a) Physiology
(b) Anatomy
(c) Biochemistry
(d) Demetology

59.Study of disease like cancer-
(a) Osteology
(b) Oncology
(c) Karyology
(d) Nephrology

60.What is vermicultrue?
(a) The science of raising worms
(b) The science of studying
(c) The science of killing worms
(d) None of these

61.Which of the following have coral reefs?
1. Andaman and Nicobar Island
2. Culf of Kachchh
3. Gul of Mannar
4. Sundar – bans
Select correct answer using code:
(a) 1, 2 and 3 only
(b) 2 and three only
(c) 2 and 4 only
(d) 1, 2, 3 and 4 only

62.What does the word ‘amphibian’ mean?
(a) Two lives
(b) Four lives
(c) Three lives
(d) One life

63.Kala –azar is transmitted by ....
(a) Black flies
(b) sand fly
(c) Tsetse fly
(d) Mites

64.Meocyanin is an oxygen-transport metalloprotein in some invertebrate animals. This protein contains:
(a) One proper atom
(b) two copper atoms
(c) one iron atom
(d) one magnesium atom

65.What is farming along with animal husbandry called?
(a) mixed farming
(b) Mixed agriculture
(c) Dairy farming
(d) Truck farming

66.Only male frog produce croaking sound because-
(a) Female frog have no larceny
(b) Female frog have larynx but no vocal cord
(c) Male frog have three pair of vocal cord
(d) Male frog can magnify their voice with the help of sound box

67.Cobra emits venom through:
(a) Fangs
(b) Tooth
(c) Lower jaw
(d) None

68.The most poisonous snake is-
(a) Rattle snake
(b) Python
(c) Krait
(d) Tree snake

69.The snake who make their nest-
(a) Chain viper
(b) King cobra
(c) Krait
(d) Shaw scaled viper

70.Dolphins are classified under-
(a) Pisces
(b) Amphibian
(c) Reptile
(d) Mammal

71.Substance found in blood which help in clotting –
(a) Fibrinogen
(b) Heparin
(c) Thrombin
(d) Globine

72.Which of the following gland is responsible for the secretion of insulin.
(a) Pituitary
(b) Pineal
(c) Thymus
(d) Pancreases

73.The sense of balance is achieved by:
(a) Cerebellum equilibrium
(b) Thalamus equilibrium
(c) Cerebrum equilibrium
(d) Spinal equilibrium

74.Image of object is formed on which part of eye-
(a) Cornea
(b) Choroid
(c) Retina
(d) Iris

75.Glucose is a type of –
(a) Teterose sugar
(b) Hexose sugar
(c) Pentose
(d) None of them

76.In an accident of, a person’s brain was injured due to which he could not regulate body temperature, hunger and water balance. Which one among the following parts of his brain was affected?
(a) Cerebellum
(b) Medulla oblongata
(c) Hypothalamus
(d) Corpus callosum

77.Which vein brings clean blood from the lungs into the heart?
(a) Renal Vein
(b) Pulmonary Vein
(c) Vena Cava
(d) Hepatic Vein

78.In human body, which one of following hormones regulates blood calcium and phosphate?
(a) Glucagon
(b) Growth hormone
(c) Parathyoid harmone
(d) Thyroxine

79.Which endocrine gland requires iodine to synthesize a particular hormone whose deficiency may cause goiter disease?
(a) Hypothalamus
(b) Pancreas
(c) Thymus
(d) Thyroid gland

80.Energy is required for maintenance of life. It is obtained by a process called-
(a) Metabolism
(b) Phagocytois
(c) Photorespiration
(d) Decomposition

81.Which one of the following is not a part of nerves?
(a) Axons
(b) Connective tissues
(c) Schwann cells
(d) Smooth muscles

82.Blood is a /an –
(a) Connective tissue
(b) Epithelial tissue
(c) Both of the above
(d) None of above

83.The largest organ of human body is-
(a) Heart
(b) Brain
(c) Liver
(d) Kidney

84.Name the Vitamin not found in any animal food:
(a) Vitamin B12
(b) Vitamin C
(c) Vitamin D
(d) Vitamin K

85.Which part became modified as the tusk of elephant?
(a) Canine
(b) Premolar
(c) Second incisor
(d) Mular

86.Pair of ribs found in man-
(a) 12
(b) 10
(c) 14
(d) 11

87.In human digestive system, the process of digestion starts in-
(a) Oesophagus
(b) Buccal cavity
(c) Duodenum
(d) Stomach

88.Volume of blood found in a healthy person-
(a) 3- 4 liter
(b) 4 – 5 liter
(c) 5 to 6 liter
(d) 6 – 7 liter

89.Purification of blood takes place in-
(a) Lung
(b) Heart
(c) Kidney
(d) Liver

90.Invention of blood group is done by-
(a) Landsteiner
(b) Levine
(c) Weniear
(d) Landsteiner & Weiner

91.Antigen presenting cells are specialized cells present in all of the following, except
(a) Kidney
(b) Lymph node
(c) Skin
(d) Spleen

92.Which blood group is a universal recipient?
(a) A
(b) B
(c) AB
(d) O

93.How many pair of nerve arises from vertebral column
(a) 12 pair
(b) 13 Pair
(c) 31 Pair
(d) 33 Pair

94.Forman Magnum is an aperture found in the –
(a) Ear
(b) Lung
(c) Girdle
(d) Skull

95.Filtration of blood occur in –
(a) Heart
(b) Kidney
(c) Liver
(d) Spleen

96.Malfunction of which organ causes diabetes?
(a) Liver
(b) Pancreas
(c) Kidney
(d) Heart

97.Amocentesis is techniques use-
(a) To determine the sex of foetus
(b) To test of amino acid
(c) To test brain
(d) None of these

98.Which of the following is known as master gland in man-
(a) Pancreases
(b) Pituitary
(c) Adrenal
(d) Thyroid

99.The hard enamel layer of teeth is-
(a) Calcium phosphate
(b) Calcium oxide
(c) Calcium hydroxyl apatite
(d) Calcium hydroxide

100.Female reproductive hormones is-
(a) Estrogen
(b) Progesterone
(c) Relaxin
(d) All of these

101.Which organelles in the cell, other than nucleus contain DNA?
(a) Centriole
(b) Golgi apparatus
(c) Lysosomes
(d) Mitochondria

102.‘Barr body’ is found in –
(a) Sperm
(b) Sertoli cells
(c) Female somatic cells
(d) Male somatic cells

103.Attractive color of flower and seed is due to-
(a) Leucoplast
(b) Chromoplast
(c) Chloroplast
(d) Tonoplast

104.Green colour of leaves is due to –
(a) Chromoplast
(b) Leucoplast
(c) Chloroplast
(d) Tonoplast

105.Suicidal bag of cell is –
(a) Lysosomes
(b) Ribsomes
(c) Nucleosomes
(d) Golgibodies

106.Function of lysosome is-
(a) Protein synthesis
(b) Processing and packaging
(c) Intracellular digestion
(d) Synthesis of fat

107.All life forms contain ‘molecules of life’. These are-
(a) Carbohydrates
(b) Proteins
(c) Ncleic acids
(d) All of these

108.Cellular totipotency means-
(a) Synthesis of new cells
(b) Formation of new cells
(c) Formation of new species
(d) Formation of new plant
(e) Capability of a plant cell to form complete plant

109.Which one of the following is the smallest unit showing the properties of life such as capacity for metabolism, response to the environment, growth and reproduction?
(a) Gene
(b) Chromosome
(c) Nucleus
(d) Cell

110.Longest cell found in the body of human-
(a) Cells of hand
(b) Cells found in leg
(c) Nerve cell
(d) None of these

111.In human body, ligaments are made up of –
(a) White fibres and some yellow elastic fibres
(b) White fibres only
(c) uyellow fibres only
(d) yellow fibres and muscle fibres

112.Iodine test is used to detect-
(a) Cholesterol
(b) Fat
(c) Protein
(d) Carbohydrate

113.Vaccination is available against all of the following disease except-
(a) Yellow fever
(b) Typhoid fever
(c) Malaria
(d) Hepatitis B

114.What is ‘breakbone fever’ most commonly known as?
(a) Typhoid
(b) Rhinitis
(c) Yellow fever
(d) Dengue

115.The vitamin which is water soluble and generally excreted in urine is
(a) Vitamin A
(b) Vitamin C
(c) Vitamin D
(d) Vitamin E

116.Which of the following is involved in controlling blood sugar level-
(a) Pitcitary gland
(b) Islets of langerhans
(c) Hypothalmus
(d) spleen

117.Nosocomial inferection is
(a) acquired from ‘nose’ of humans
(b) acquired from nasal cavity of animals
(c) hospital acquired
(d) an endemic disease

118.Deficiency of which of the following elements is responsible for weakening of bones?
1. Calcium
2. Phosphorus
3. Nitrogen
4. Carbon
Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 1 only
(c) 1, 2 and 3
(d) 4

119.The DPT vaccine, a mixture of three vaccines, is used to immunize against three medical conditions/deseases. These medical conditions /diseases are
(a) Diphteria, Pneumonia, Tuberculosis
(b) Diarrhoea, Pertussis, Tetanus
(c) Diarrhoea, Pertussis, Tuberculosis
(d) Diphtheria, Pertussis, Tetanus

120.Xerophthalmia in human beings is caused due to deficiency of –
(a) Vitamin – K
(b) Vitamin – D
(c) Vitamin – A
(d) Vitamin – C

121.Who invented the vaccination for small pox-
(a) Sir Fredrick Grant Banting
(b) Sir Alexander Fleming
(c) Edward Jenner
(d) Louis Pasteur

122.Protein – Energy Malnutrition causes-
(a) Marasmus
(b) Rickets
(c) Beri- beri
(d) Pellagra

123.Vitamin – A is mainly stored in-
(a) Lungs
(b) Kidney
(c) Breast
(d) Liver

124.Precursor of which one of the following vitamins comes from β –carotene?
(a) vitamin A
(b) vitamin C
(c) vitamin D
(d) vitamin K

125.Typhoid and cholera are typical example of –
(a) infectious diseases
(b) airborne diseases
(c) waterborne disease
(d) None

126.Blood cancer is commonly known as-
(a) Leucoderma
(b) Leukaemia
(c) Haemophilia
(d) Anemia

127.Which of the following is most injurious growing population of India?
(a) Opium
(b) Datura
(c) Ganja
(d) Tobacco

128.The word ‘vaccination’ has been derived from a Latin word which relates to:
(a) Pig
(b) Horse
(c) Cow
(d) Dog

129.Who is the father of Genetics?

(a) Darwin

(b) Medel

(c) Bridge

(d) Wiseman

130.Word gene was given by-

(a) Morgan
(b) Mental
(c) Johansen
(d) Bridge

131.Double helix model of DNA is given by
(a) Leween hook
(b) Salach
(c) Watson and Crick
(d) Dalton

132.DNA fingerprinting is a technique used for the detection of-
(a) Alzheimer’s disease
(b) Disputed parentage
(c) AIDS
(d) Yellow fever

133.Differentiation of organs and tissues in a developing organism is associated with-
(a) Differential expression of genes
(b) Development mutation
(c) Delation of genes
(d) Lethal mutation

134.Reserve transcription was discovered by-
(a) Watson & Crick
(b) Hargovind Khorana
(c) Lemin & Baltimore
(d) Beadle & Tatum

135.Gene is :
(a) Particular DNA segment which determines heredity of a particular trait
(b) Half DNA segment of somatic cells
(c) Whole DNA
(d) Half DNA segment

136.When one gene pair hides the effect of the other unit, the phenomenon is referred to as-
(a) None of the options
(b) Epistasis
(c) Dominance
(d) Mutation

137.Life originate by chemo synthesis was proved in the laboratory by-
(a) Pasteur
(b) Sager
(c) Aristotle
(d) Miller

138.Homologous organs are –
(a) Dissimilar origin and dissimilar structure
(b) Dissimilar origin but similar function
(c) Dissimilar origin with similar or dissimilar function
(d) Dissimilar origin with dissimilar function

139.The term ecosystem is first given by-
(a) Reiter
(b) Aristotal
(c) Tansley
(d) Haeckel

140.Which one of the following is the correct sequence of a food chain?
(a) Diatoms- Crustaceans – Herrings
(b) Crustaceans – Diatoms-Herrings
(c) Diatoms –Herrings –Crustaceans
(d) Crustaceans – Herrings –Diatoms

141.Vultures which used to be very common in Indian country side some years ago are rarely seen nowadays. This is attributed to-
(a) The destruction of their nesting sites by new invasive species
(b) A drug used by cattle owners for treating their diseased cattle
(c) Scarcity of food available to them
(d) A widespread, persistent and fatal disease among them

142.Centre for Ecological Science is situated at-
(a) new Delhi
(b) Allahabad
(c) Karnal
(d) Bengaluru

143.Which one lacks both root and stomata-
(a) Hydrophyts
(b) Mesophytes
(c) Hygrophytes
(d) Halophytes

144.10% law of energy transfer in food chain was given by –
(a) Lindemann
(b) Stanley
(c) Tansley
(d) Weismann

145.Energy transfer from organism to organism in a natural community develops-
(a) Biological control
(b) Food chain
(c) Food web
(d) Pyramid of energy

146.Pyramid of energy in a ecosystem is-
(a) Always inverted
(b) Always upright
(c) Spindle shape
(d) Both upright and inverted depending upon ecosystem

147.Eco-mark is given to an Indian product which is;
(a) Rich in protein
(b) Environment friendly
(c) Economically viable
(d) Pure and unadulterated

148.The world’s only floating national park is situated in-
(a) Manipur
(b) Kulakumpur
(c) Bilaspur
(d) Dispur

149.Which of the following can be found as pollutans in the drinking water in some parts of India- Select the correct answer using the code given below:
(a) Arsenic
(b) Sorbital
(c) Fluride
(d) Formaldehyde
(e) Uranium

150. The most important indoor air pollutant is-
(a) Sulphur Dioxide
(b) Carbon Dioxide
(c) Nitrogen Dioxide
(d) Radon gas
(e) None of these

151.Which of the following is the bestg indicator of SO2:
(a) Bryophyte
(b) Lichen
(c) Algae
(d) Pteridophyte

152.BOD is –
(a) Biological oxygen deficit
(b) Biosphere oxygen demand
(c) Biological oxygen demand
(d) None of these

153. Match List I with List II and select the correct answer using the code given below the List:

A. Chlorofluorocarbon 1. Acid rain
B. Sulphur dioxide 2. Depletion in ozone layer in the atmosphere
C. Lead compound 3. Harmful for human nervous system
D. Carbon dioxide 4. Top most contribution to greenhouse effect


(a)4 3 1 2
(b)4 1 3 2
(c)2 1 3 4
(d)2 3 1 4

154. Cyanide poisoning causes death in seconds because
(a) it causes Lysis of red
(b) It deneatures enymes of the heart muscle
(c) It causes cardiac arrest
(d) it breaks the electron

155.Sound become hazardous noise pollution at level –
(a) Above 30 dB
(b) Above 80 dB
(c) Above 100 dB
(d) Above 120 dB

156.Which gas is responsible for global warming-
(a) O2
(b) O2 and CO2
(c) CO2 and CH4
(d) CH4

157. Which of the following appeared to be with a significant potential for accumulation through food chains?
(a) DDT
(b) Parathion
(c) Lindane
(d) Carbaryl

158.Ozone day is-
(a) January, 30
(b) September, 16
(c) April, 21
(d) December

159.Consider the following statements-
1. Kyoto protocol came into force in the year 2005
2. Kyoto protocol deals primarily with the depletion of the ozone layer
3. Methane as green house gas is more harmful than carbon dioxide

which of the statements given above is/ are correct.
(a) 1 & 2
(b) 1 and 3
(c) 1 only
(d) 3 only

160.Double helix model of DNA is given by –
(a) Mullar
(b) Meghnath Sha
(c) Stepham Hawking
(d) Watson and Crick

161.August Weisman proposed –
(a) Natural selection theory
(b) Germ plasm theory
(c) Modern synthetic theory
(d) Inheritance of acquired character

162.Match List I with List II and select the correct answer using the code given below the List:

                           LIST –I (AIR POLLUTANT) LIST –II (EFFECT)
A. Isotope of Uranium 1. Treatment of cancer
B. Isotope of Cobalt 2. Treatment of goiter
C. Isotope of Iodine 3. Treatment of secondary cancer
D. Isotope of Radium 4. Nuclear fueL


(a) 1 4 2 3
(b) 2 3 5 4
(c) 1 3 2 4
(d) 2 4 5 3



163.The ‘red data book’ containing information on all wild plant and animals which is in danger of extinction has been published by which one of the following?
(a) International union for conservation of nature and natural Resources (IUCN)
(b) World Wild life Fund (WWF)
(c) World Conservation Union (WCU)
(d) United National union Program (UNEP)

164.Consider the following regions of India-
1. Western Ghat
2. Aravali Hills
3. Eastern Himalayas
Which of the above is /are biodiversity hot spot/hot spots
(a) 1 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3

165.Which of the following is largest biosphere reserves of India-
(a) Kanjiranga
(b) Sundarban
(c) Bandipur
(d) Periyar

166.Which of the following is a Biological method of soil conservation?
(a) Contour farming
(b) Contour terracing
(c) Gully control
(d) Basin listing

167.According to your text, ‘What can be thought of as the genetic library that keeps life going on Earth’?
(a) A bio- engineering lag
(b) Human genes
(c) The human genome project
(d) Biodiversity

168.The genetically engineered ‘Golden Rice is rich’ in which of the following-
(a) Vitamin A and nicotinc acid
(b) B – Carotene, Vitamin A and folic acid
(c) B – Caroten and iron
(d) Vitamin A and niacin

169.Recombinant DNA technology (Genetic Engineering) allows genes to be transferred.
1. across animal’s species of plants
2. from animals to plants
3. from microorganisms to higher organisms
Select the correct answer using the codes given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

170.A clone is a group of individual obtained through:
(a) Self pollination
(b) Micro-propagation
(c) Hybridization
(d) Cross pollination

171.First hormone prepared by genetic engineering is-
(a) Oxytocin
(b) Somato tropin
(c) Adrenalin
(d) Insulin

172.A genetically engineered form of brinjal known as the Bt-bringal has been developed. The objective of this is-

(a) To make it pest – resistant
(b) To improve its taste and nutritive qualities
(c) To make it drought resistant
(d) To make its self-life longer

173.With reference to ‘stem cells’, frequently in the news, which of the following statements is/are correct?
1. Stem cells can be derived from mammal only.
2. Stem cells can be used for screeing new drugs.
3. Stem cells can be used for medical therapies.

Select the correct answer using the codes given below:
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3

174. Penicillin is extracted from

(b) algae
(d) lichen
Ans : c.

Q175. Which is the effect of antigen in an ill person ?

(a)It increases the production of W.B.C.
(b)It increases the production of antibiotics
(c)It increases the production of anti-serum against bacteria
(d)It prevents the growth of bacteria
Ans : b

Q176. Which among the following helps in circulation of blood ?
(b)Blood platelets
Ans : d

Q177. Which among the following elements increases the absorption of water and calcium in plants ?
Ans : b

Q178. Which wood will become useless soon after exposing in the open air ?
(b)Fibrous wood
(c)Wet wood
Ans : c

Q179. Which among the following is a large spectrum Antibiotic ?
Ans : (c)Ampicillin

Q180. Our bones and teeth are generally made of
(a)Tricalcium phosphate
Ans : (a)Tricalcium phosphate

Q181. Angora wool is extracted from
Ans: (a)rabbit

Q182. Which of the following diseases affects women easily than that of men ?
(a)Heart attack
(c)Joint arthritis
Ans : (a)Heart attack

Q183. Pituitary gland is located in
Ans: (a)brain

Q184. What is the limit of MG/DL of blood sugar in the normal person at the time of fast ?
Ans : (c)70-100

Q185. The cross section of a stem of tree has fifty rings . what is the age of the tree ?
(a)50 months
(b) 5 years
(c) 25 years
(d) 50 years
Ans : (d) 50 years

Q186. Onion is a modified form of
(b) stem
(d)None of these
Ans: (b) stem

Q187. The pollination of maize takes place by

(b)pollination by insects
(c)pollination by air
(d)pollination by rain
Ans : (c)pollination by air

Q188. Why radiologists do not take direct Xray photographs of intestine ?
(a)Intestines are affected by direct exposure to X-rays
(b)X-rays cannot cross intestine
(c) X-rays are not able to capture clear picture
(d) Even short exposure of X-rays causes cancer in intestine
Ans : (c) X-rays are not able to capture clear picture

Q189. Exobiology deals with the study of :
(a)external characters of living organisms
(b)life on the surface of the earth
(c)life in the outer layers of atmosphere
(d)life in other planets and space
Ans : (d)life in other planets and space

Q190. Animals do not have enzyme systems which enable them to make use of the energy from :
(b) water
Ans : (a)fat

191. DOTS is a treatment given to patients suffering from _______
A. Polio
C. Hepatitis
D. Tuberculosis
Ans. D.

192.Polyploidy arises due to change in the
A. number of chromatids
B. structure of genes
C. number of chromosomes
D. structure–of chromosomes
Ans. A.

193. The suicidal bags of the cell are
A. Lysosomes
B. Ribosomes
C. Dictyosomes
D. Phagosomes
Ans. A.

194.Who among the following is credited with starting the work on plant tissue culture?
A. F.C. Steward
B. P. Maheshwari
C. P.R. White
D. Haberlandt
Ans. D.

195.Which of the following uses the spawn mechanism to duplicate itself?
A. Trojan horse
B. Worm
C. Keystroke logger
D. Logic bomb
Ans. B.

196.What is the main purpose of white blood corpuscles?
A. to carry nutrients
B. to combat infection
C. to carry oxygen
D. to give strength
Ans. B.

197.The layer where the decrease in temperature with increasing altitude is totally absent is
A. Troposphere
B. Ionosphere
C. Stratosphere
D. Mesosphere
Ans. C.

198.Siderosis is a disease caused by the inhalation of
A. silica dust
B. iron dust
C. zinc dust
D. coal dust
Ans. B.

199.The largest artery in human body is
A. Aorta
B. Capillary
C. Vena cava
D. Pulmonary vein
Ans. A.

200.Nitrification is the biological process of converting
A. N2 into nitrate
B. N2 into nitrite
C. Ammonia into nitrite
D. Ammonia into N2
Ans. C

201. Blood is red in colour due to the presence of __________ .
A. Cytochrome
B. Chlorophyll
C. Hemocyanin
D. Haemoglobin
Ans. D.

202. Which one of the following events in a botanical garden is never directly influenced by light?
A. Flowering
B. Photosynthesis
C. Transpiration
D. Fertilization
Ans. D.

203.Which of the following is usually not an air pollutant?
A. Hydrocarbons
B. Sulphur dioxide
C. Carbon dioxide
D. Nitrous oxide
Ans. D.

204.Which of the following is the treatment of water pollution?
A. Bag house filter
B. Windrow composting
C. Venturi scrubber
D. Reverse Osmosis
Ans. D.

205.Which cells in pancreas produce Insulin ?
A. Thymus
B. Estrogen
C. Corpus epidermis
D. Islets of Langerhans
Ans. D.

206.The waste management technique that involves the use of micro-organisms to remove or neutralize pollutants from contaminated site is called
A. Bio sensor
B. Bio magnification
C. Bio remediation
D. Bio concentration
Ans. C.

207.The source of energy that causes the least global warming is
A. coal
B. Geothermal energy
C. Natural Gas
D. Petroleum
Ans. B.

208.The oxygen liberated during photosynthesis comes from
A. Water
B. Carbon dioxide
C. Glucose
D. Chlorophyll
Ans. A.

209.The term 'Higgs Boson' is associated with
A. Nano Technology
B. Oncology
C. God Particle
D. Stem Cell Research
Ans. C.

210.The hormone that stimulates heart beat is

200+ Biology Important Questions SSC CGL, Stenographers Grade C & D, MTS and CHSL Exams