Biology GK Questions – Biology General Knowledge questions for Competitive Exams


These are important biology GK questions for all competitive exams. Here, I am providing very useful biology gk questions with answers for all the competitive exams. Practice with these selective Biology General Knowledge Questions for competitive exams.

These questions are useful for any competitive exam like IAS, Bank PO, SSC CGL, RAS, CDS, UPSC exams, and all state-related exams. For more practice, you can read also these latest biology questions and answers for the score high in your exams.


Q.1. What does the word ‘amphibian’ mean?

(a) Two lives
(b) Four lives
(c) Three lives
(d) One life

(a) Two lives


Q.2. Meocyanin is an oxygen-transpot metalloprotein in some invertebrate animals. This protein contains:

(a) One proper atom
(b) two copper atoms
(c) one iron atom
(d) one magnesium atom

(a) One proper atom


Q.3. What is farming along with animal husbandry called?

(a) mixed farming
(b) Mixed agriculture
(c) Dairy farming
(d) Truck farming

(a) mixed farming


Q.4. Only male frog produce croacking sound because-

(a) Female frog have no layrny
(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

(a) Female frog have no layrny


Q.5. Cobra emits venom through:

(a) Fangs
(b) Tooth
(c) Lower jaw
(d) None

(a) Fangs


Q.6. The most poisonous snake is-

(a) Rattle snake
(b) Python
(c) Krait
(d) Tree snake

(c) Krait


Q.7. The snake who make their nest-

(a) Chain viper
(b) King cobra
(c) Krait
(d) Shaw scaled vipar

(b) King cobra


Q.8. Dolphins are classified under-

(a) Pices
(b) Amphibian
(c) Reptile
(d) Mamma

(d) Mamma


Q.9. Substance found in blood which help in cloting –

(a) Fibrinogen
(b) Heparin
(c) Thrombin
(d) Globine

(a) Fibrinogen


Q.10. Which of the following gland is responsible for the secretion of insulin.

(a) Pituitary
(b) Pineal
(c) Thymus
(d) Pancrease

(d) Pancrease


Q.11. The sense of balance is achieved by:

(a) Carebellum equilibrium
(b) Thalamus equilibrium
(c) Cerebrum equilibrium
(d) Spinal equilibrium

(a) Carebellum equilibrium


Q.12. Image of object is formed on which part of eye-

(a) Cornea
(b) Choroid
(c) Retina
(d) Iris

(c) Retina


Q.13. Glucose is a type of –

(a) Teterose sugar
(b) Hexose sugar
(c) Pentose
(d) None of them

(b) Hexose sugar


Q.14. To which one of the following types of organisms do mushrooms belong?

(a) Algae
(b) Ferns
(c) Fungi
(d) Lichens

(c) Fungi


Q.15. Food wrapped in newspaper is likely to get contaminated with

(a) Lead
(b) Aluminium
(c) Iron
(d) Magnesium

(a) Lead


Q.16. Which one of the following produces seeds but no flowers?

(a) Cashew nut
(b) Coffee
(c) Ground nut
(d) Pine

(c) Ground nut


Q.17. Which one of the following plants is used for green manuring in India?

(a) Wheat
(b) Sunhemp
(c) Cotton
(d) Rice

(b) Sunhemp


Q.18. The combination of foods providing protein quality nearest to that of meat is

(a) Wheat, dal and groundnuts
(b) Bread and butter
(c) Sprouted gram and groundnuts
(d) Groundnuts and jiggery

(c) Sprouted gram and groundnuts


Q.19. Which one of the following disease is Inheritable?

(a) Leukaemia
(b) Colour blindness
(c) Malignancy
(d) Hepatitis

(b) Colour blindness


Q.20. Which one of the following elements are present in all proteins? 1. Carbon 2. Hydrogen 3. Oxygen 4. Nitrogen

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

(d) 1,2,3 and 4


Q.21. For which one among the following diseases no vaccine is yet available?

(a) Tetanus
(b) Malaria
(c) Measles
(d) Mumps

(b) Malaria


Q.22. Which of the following vitamins is synthesised in the body by intenstinal bacteria?

(a) vitamin B1
(b) vitamin B4
(c) vitamin D
(d) vitamin K

(d) vitamin K


Q.23. BCG vaccination (Bacillus Calmette Guerine) is injected to get immunity from

(a) Polio
(b) Cholera
(c) Small pox
(d) Tuberculosis

(d) Tuberculosis


Q.24. Which among the following makes the peepal tree release oxygen all the time?

(a) C3 Photosynthesis
(b) C4 Photosynthesis
(c) Crassulacean Acid Metabolism
(d) Carbon cycle re-balancing

(c) Crassulacean Acid Metabolism


Q.25. The Ephemeral plants are those plants which _________:

(a) are capable of tolerating saline conditions
(b) are adapted to seasonal or perennial drought
(c) derive water and nutrients from air
(d) complete their cycle in very short period

(d) complete their cycle in very short period


Q.26. Memory loss would most likely be due to a malfunction of which part of the brain?

(a) Medulla
(b) Cerebellum
(c) Cerebrum
(d) Pons

(c) Cerebrum


Q.27. In recent times, the Emerging Infectious Diseases (EIDs) have been a subject of concerns. What is the major reason for rise in the Emerging Infectious Diseases (EIDs)?

(a) Unwarranted use of antibiotics
(b) Too much soil and water pollution
(c) Heavy deforestation
(d) Unsanitary living conditions in third world

(c) Heavy deforestation


Q.28. Which among the following is NOT a primary nutrient for plants?

(a) Nitrogen
(b) Phosphorus
(c) Magnesium
(d) Potassium

(c) Magnesium


Q.29. From the point of view of evolution of living organisms, which of the following set of animals is a correct sequence of evolution?

(a) Whale, Kangaroo, Echidna
(b) Echidna, Whale, Kangaroo
(c) Kangaroo, Whale, Echidna
(d) Echidna, Kangaroo, Whale

(d) Echidna, Kangaroo, Whale


Q.30. Statements:

  1. In Gymnosperms, seeds areenclosing in side fruits.
  2. Dicots and monocots are includedin Angiospersm.

(a) Both Statements 1 and 2 arecorrect
(b) Both Statements 1 and 2 areincorrect
(c) Statement 1 is correct, but Statement 2 is incorrect
(d) Statement 1 is incorrect, but Statement 2 is correct

(d) Statement 1 is incorrect, but Statement 2 is correct


Q.31. Which part of the cinchona yields a drug?

(a) Endosperm
(b) Pericarp
(c) Bark
(d) leaf

(c) Bark


Q.32. Fiber of cotton is obtain from-

(a) Stem
(b) Seed
(c) Fruit
(d) Root

(c) Fruit


Q.33. 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

(a) Integrase


Q.34. Dr. Norman E. Borlaug belonged to-

(a) Spain
(b) Mexico
(c) America
(d) Austria

(c) America


Q.35. Eye of potato are –

(a) Apical buds
(b) Axillary buds
(c) Adventitous root
(d) Extra axillary bud

(b) Axillary buds


Q.36. Ginger is-

(a) Modified root
(b) Modified stem
(c) Modified leaf
(d) Modified bulb

(b) Modified stem


Q.37. Cactus is referred to as-

(a) Hydrophte
(b) Mesophte
(c) Xerophyte
(d) Epiphte

(c) Xerophyte


Q.38. Agar – agar is prepared from

(a) Alage
(b) Lichens
(c) Fungi
(d) Bryophyte

(a) Alage


Q.39. The inflorescence of wheat is-

(a) Raceme
(b) Catkin
(c) Spike
(d) Panicle

(c) Spike


Q.40. Consider the following statements:

(1) Maize can be used for theproduction of starch
(2) Oil extracted from miaze can bea feedstock fro biodiesel
(3) Alcoholic beverages can beproduced by using maise.
Which of the statements given aboveis/ are correct?

(a) 1 only
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1, 2, and 3

(d) 1, 2, and 3


Q.41. Double fertilization is main feature of-

(a) Bryophtes
(b) Pteridophytes
(c) Gymnosperm
(d) Angiosperm

(d) Angiosperm


Q.42. Parthenogenesis is a process in which-

(a) Fruit develop without harmone
(b) Fruit develop without fertilization
(c) Development of egg without fertilization
(d) Development of embryo without fertilization

(b) Fruit develop without fertilization


Q.43. A fertilized egg is known as-

(a) Oospore
(b) Conidiospre
(c) Zoospore
(d) Zygote

(d) Zygote


Q.44. Lungs of a plant are-

(a) Leaves
(a) Stems
(a) Flowers
(a) Roots

(a) Leaves


Q.45. Which one of the following is an enzyme?

(a) Glucagon
(b) Insulin
(c) Somatotropin
(d) Trypsin

(d) Trypsin


Q.46. Which vitamin is provided by sunlight to the body?

(a) Vitamin A
(b) Vitamin B
(c) Vitamin C
(d) Vitamin D

(d) Vitamin D


Q.47. The deficiency of which of the following leads to dental caries?

(a) Iron
(c) Copper
(b) Fluorine
(d) Zinc

(b) Fluorine


Q.48. Healing of wounds is hastened by vitamin

(a) A
(b) E
(c) C
(d) K

(c) C


Q.49. Which of the following diseases is caused by the bite of a mad dog?

(a) Hydrocele
(b) Hydrophobia
(c) Hydrocephatus
(d) Hydroperitoneum

(b) Hydrophobia


Q.50. Which of the following vegetable proteins is considered as good as an animal protein?

(a) Soyabean protein
(b) corn protein
(c) Wheat protein
(d) Bengal gram protein

(a) Soyabean protein


Q.51.Carotene in Indian cow’s milk causes

(a) Creamish white colour
(b) yellow colour
(c) deep yellow colour
(d) no change

(b) yellow colour


Q.52. A woman who weighs 45 kg and whose work involves a lot of physical exertion needs

(a) 2800 calories per day
(b) 3000 calories per day
(c) 25000 calories per day
(d) 3700 calories per day

(b) 3000 calories per day


Q.53. Foot and mouth disease is found in

(a) Cats and dogs
(b) Cattle
(c) Poultry
(d) Humans

(b) Cattle


Q.54. Which one of the following is a primate?

(a) Bear
(b) Otter
(c) Loris
(d) Pangolin

(c) Loris


Q.55. Which of the following Kingdom represents bacteria?

(a) Monera
(b) Protista
(c) Protozoa
(d) Metazoa

(a) Monera


Q.56. Athlete’s Foot or Tinia Pedis is caused by which of the following ?

(a) Bacteria
(b) Virus
(c) Fungi
(d) Protozoan

(c) Fungi


Q.57. Dengue which is found in tropical and subtropical regions around the world is a mosquito borne disease and caused by a __________?

(a) Bacteria
(b) Virus
(c) Fungi
(d) Protozoan

(b) Virus


Q.58. Diabetes insipidus (DI) caused by a deficiency of arginine vasopressin (AVP), also known as antidiuretic hormone (ADH). This hormone is secreted by which endocrine gland?

(a) Thyroid Gland
(b) Pituitary Gland (Hypophysis)
(c) Pancreas
(d) Liver

(b) Pituitary Gland (Hypophysis)


Q.59. Vitamin A, D & C are respectively called as __________?

(a) Retinol, Ascorbic Acid, Calciferol
(b) Retinol, Calciferol, Ascorbic Acid
(c) Pyridoxal. Calciferol. Ascorbic Acid
(d) Ascorbic Acid, Pyridoxal. Calciferol

(b) Retinol, Calciferol, Ascorbic Acid


Q.60. Which among the following has a fibrous root?

(a) Grass
(b) Mize
(c) Carrot
(d) Rice

(a) Grass


Q.61. Which among the following is called ‘queen of spices’?

(a) Cardamom
(b) Clove
(c) Turmeric
(d) None of the above

(a) Cardamom


Q.62. The edible part of ‘cabbage’ is which of the following?

(a) Inflorescence
(b) Bud
(c) fruit
(d) none of the above

(b) Bud


Q.63. Which among the following is correct regarding Hemophilia?

(a) the disease is carried by females and expressed by males
(b) the disease is carried by males and expressed by females
(c) the disease is carried by males & females and expressed by males
(d) none of the above

(a) the disease is carried by females and expressed by males


Q.64. Which among the following disease is caused by deficiency of Nicotinic acid?

(a) Anemia
(b) Pellagra
(c) Dermatitis
(d) Goiter

(b) Pellagra


Q.65. Antigen presenting cells are specialized cells present inall of the following, except

(a) Kidney
(b) Lymph node
(c) Skin
(d) Spleen

(b) Lymph node


Q.66. Which blood group is a universal recipient?

(a) A
(b) B
(c) AB
(d) O

(c) AB


Q.67. How many pair of nerve arises from vertebral column

(a) 12 pair
(b) 13 Pair
(c) 31 Pair
(d) 33 Pair

(c) 31 Pair


Q.68. Forman Magnum is an aperture found in the –

(a) Ear
(b) Lung
(c) Girdle
(d) Skull

(d) Skull


Q.69. Filtration of blood occur in –

(a) Heart
(b) Kidney
(c) Liver
(d) Spleen

(c) Liver


Q.70. Malfunction of which organ causes diabetes?

(a) Liver
(b) Pancreas
(c) Kidney
(d) Heart

(b) Pancreas


Q.71. Amocentesis is techniques use-

(a) To determine the sex of foetus
(b) To test of amion acid
(c) To test brain
(d) None of these

(a) To determine the sex of foetus


Q.72. Which of the following is known as master gland in man-

(a) Pancrease
(b) Pituitary
(c) Adrenal
(d) Thyroid

(b) Pituitary


Q.73. The hard enamel layer of teeth is-

(a) Calcium phosphate
(b) Calcium oxide
(c) Calcium hydroxyl apatitie
(d) Calcium hydroxide

(c) Calcium hydroxyl apatitie


Q.74. Female reproductive harmons is-

(a) Extrogen
(b) Progestron
(c) Relaxin
(d) All of these

(d) All of these


Q.75. Which organelles in the cell, other than nucleus contain DNA?

(a) Centriole
(b) Goalgi apparatus
(c) Lysosomes
(d) Mitochondria

(d) Mitochondria


Q.76. ‘Barr body’ is found in –

(a) Sperm
(b) Sertoli cells
(c) Female somatic cells
(d) Male somatic cells

(c) Female somatic cells


Q.77. Attractive colour of flower and seed is due to-

(a) Leucoplast
(b) Chromoplast
(c) Chloroplast
(d) Tonoplast

(b) Chromoplast


Q.78. Green colour of leaves is due to –

(a) Chromoplast
(b) Leucoplast
(c) Chloroplast
(d) Tonoplast

(c) Chloroplast


Q.79. Sucidal bag of cell is –

(a) Lysosomes
(b) Ribsomes
(c) Nucleosomes
(d) Golgibodies

(a) Lysosomes


Q.80. Which one among the following glands is present in pairs in human body?

(a) Adrena
(b) Liver
(c) Pancreas
(d) Pineal

(a) Adrena


Q.81. During the process of respiration in human beings, the exchange of gases takes place in

(a) bronchi
(b) alveoli
(c) bronchiole
(d) pleura

(b) alveoli


Q.82. Which one of the glands in human body produces the growth hormone (Somatotropin)?

(a) Adrenal
(b) Pancrease
(c) Pituitary
(d) Thyroid

(c) Pituitary


Q.83. Which one of the following is a pigment?

(a) Albumin
(b) Elastin
(c) Keratin
(d) Melanin

(d) Melanin


Q.84. In human beings, the opening of the stomach into the small intestine is called

(a) caecum
(b) ileum
(c) oesophagus
(d) pylorus

(d) pylorus


Q.85. In which part of the human body do we find the islet of langerhans?

(a) brain
(b) pancreas
(c) kidney
(d) liver

(b) pancreas


Q.86. Cell or tissue death within a living body is called as

(a) Neutrophilia
(b) Nephrosis
(c) Necrosis
(d) Neoplasia

(c) Necrosis


Q.87. Which part of the human eye is transplanted from a dead donor to a living person?

(a) cornea
(b) retina
(c) iris
(d) sclera

(a) cornea


Q.88. In the human body, nails are made up of

(a) melanin
(b) keratin
(c) enamel
(d) cartilage

(b) keratin


Q.89. Sweating during exercise indicates operation of which one of the following processes in the human body?

(a) Enthalpy
(b) Homeostasis
(c) Phagocytosis
(d) Osmoregulation

(b) Homeostasis


Q.90. Disease known as “Kharra” has been responsible for the decrease in number of which of the following fauna?

(a) House sparrow
(b) Lion tailed macaque
(c) Indian wild ass
(d) Vultures

(c) Indian wild ass


Q.91. Plumbism is a condition which occurs due to accumulation of:

(a) Lead in the body
(b) Sodium in the body
(c) Cadmium in the body
(d) Potassium in the body

(a) Lead in the body


Q.92. Malaria can be caused by:

(a) all anopheles mosquitoes
(b) all culex mosquitoes
(c) only males Culex mosquitoes
(d) only female anopheles mosquitoes

(d) only female anopheles mosquitoes


Q.93. Silviculture is the branch of botany in which we study about-

(a) Culture of algae
(b) Development of ofrest
(c) Culture of fungi
(d) Siliciphida plant

(b) Development of ofrest


Q.94. Study of pollen grain is called-

(a) Pomology
(b) Polynology
(c) Phocology
(d) Mycology

(b) Polynology


Q.95. Study of internal structure of plant-

(a) Morphology
(b) Anatomy
(c) Cology
(d) Taxonomy

(b) Anatomy


Q.96. Estimatin of age of woody plant by counting annual ring is-

(a) Dendrology
(b) Denrochronolgy
(c) Agronomy
(d) Demography

(b) Denrochronolgy


Q.97. Study of growing plant without soil in water containing nutrient is-

(a) Hydrotonics
(b) Hydrophonics
(c) Hypotonics
(d) None

(b) Hydrophonics


Q.98. 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 setallite

(d) Life found in space and on other setallite


Q.99. Xenobiotics which are inherently resistant to microbial attack are called as-

(a) Biodegradable
(b) All of the given optins
(c) Recalcitrant
(d) Persistent

(c) Recalcitrant


Q.100. Curd is sour due to presence of

(a) Citric Acid
(b) Lactic Acid
(c) Acetic Acid
(d) None of these

(b) Lactic Acid


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