Biology MCQs | Set 1

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Most Expected Questions For All Competitive Exams

1.    Who was the first to isolate Gene?     –Dr. Hargobind Khurana

2.    Which cell organelles function as the power house of a living cell?      –Mitochondria

3.    Nobel Prize winning scientist James D. Watson is known for his work in which area?     –Genetics

4.    What is the Branch of science which deals with the study of skin of man?      –Dermatology

5.    Which test helps in diagnosis of cancer?     –Biopsy Test

6.    The filtering of blood through an artificial kidney is called______?      –Dialysis

7.    Animals store glucose in the form of_______?     –Glycogen

8.    Who invented penicillin?     –Alexander Fleming

9.    The longest and largest bone in the human body is_________?     –Femur

10.    Which is known as master gland in man?     –Pituitary gland

11.    Which vitamin is essential for the coagulation of blood?     –Vitamin K

12.    Which insect spreads kala-azar?     –Sand Fly

13.    Name the smallest functional unit of the kidney?     –Nephron

14.    What is the smallest structural and functional unit of nervous system?      –Neuron

15.    Which animal have no blood but they respire?     –Hydra

16.    What is the Dental formula of man?     –2123/2123

17.    The biogas used for cooking is a mixture of ___?     –Methane & Carbondioxide

18.    Which plant yeilds biodiesel or biofuel?     –Jatropha Curcas

19.    The most serious air pollutant causing health hazard is___?      –Sulphur dioxide

20.    Which major chemical compound found in human kidney stones?      –Calcium oxalate

21.    Sex determination of child is done by whose chromosome?     –Father

22.    What is the name of first clones sheep?     –Dolly

23.    What is known as ‘kitchen of cell’?     –Chloroplast

24.    Enlargment of which gland takes place due to deficiency of iodine?      –Thyroid

25.    Which part of human brain is the regulating centre for swallowing and vomiting?    –Medulla Oblongata

26.    What are Bryophytes?     –Amphibious

27.    The number of Chromosomes in the human gene is ___.     –46

28.    Polio is caused by whom?     –Virus

29.    Ductless glands are known as___?     –Endocrine glands

30.    The human faces is yellow in colour due to the presence of a pigment called___?     –Urobilin

31.    Which enzyme is found in human saliva?     –Ptyalin

32.    Hansen’s disease is also known as___?     –Leprosy

33.    What is systolic and diastolic pressure in a healthy man?      –120mm & 80mm

34.    Which is considered as the strongest natural fibre?     –Silk

35.    The deficiency of which leads to dental caries?     –Fluorine

36.    Companion cells are unique to_____?     –Angiosperms

37.    The smallest bone in the human body is______?     –Stapes

38.    A person feel fatigued due to deposition of which acid in their muscles?      –Lactic Acid

39.    How many bones are present in human skull?     –22

40.    Which lobe of human brain is associated with hearing?     –Temporal Lobe

41.    Upper most layer of skin is called ___?     –Epidermis

42.    Motor skills are associated with which part of the brain?     –Frontal Lobes

43.    Blood group was discovered by whom?     –Landsteiner

44.    The ph value of human blood is_____?     –7.40

45.    Name the largest gland in the human body?     –Liver

46.    What is the chemical name of a substance which kills rats?     –White Phosphorus

47.    The metal present in the haemoglobin is _______.     –Iron

48.    Which mosquito is the carrier of Zika virus?     –Aedes

49.    Name the gas used for making vegetable ghee?     –Hydrogen

50.    Which part of brain is centre of thirst, hunger and sleep?     –Hypothalamus

51.    Which regulates the quantum of light entering the human eye?      –Iris

52.    DNA stands for ________.     –Deoxyribonucleic Acid

53.    What percentage of water is lost during transpiration?     –99%

54.    Pyramid of energy is ____?     –Always upright

55.    Edward Jenner is related with which disease?     –Small pox

56.    The hormone used as an oral contraceptive is ____.     –Progesterone

57.    Which vitamin is considered to be a hormone?     –Vitamin D

58.    The process of photosynthesis involves conversion of what? –Solar energy into chemical energy

59.    Who explained about the blood circulation for the first time?     –William Harvey

60.    Dog bite can cause rabies. Which other animal can also cause rabies?     –Bat

61.    Saliva helps in the digestion of which thing?     –Starch

62.    Which is the sweetest sugar?     –Fructose

63.    Which enzyme is present in all members of the animal kingdom except Protozoa?     –Amylase

64.    What is contained in Chlorophyll?     –Magnesium

65.    From which part of the plant is turmeric obtained?     –Stem

66.    Lacrymal glands are situated in the___?     –Eye Orbit

67.    The specific role of Vitamin K is in the synthesis of     –Prothrombin

68.    Which Part of plant is important for the life cycle of plant?     –Flower

69.    Increased RBC’s in the blood leads to a condition called___?     –Polycythemia

70.    Name the hormone that regulates the amount of glucose in the blood.     –Insulin

71.    Which is known as graveyard of RBC’s?     –Spleen

72.    Which disease is caused by the bite of a mad dog?     –Hydrophobia

73.    What is the normal cholesterol level in human blood?     –180-200 mg/dL

74.    The first vaccine injected into a just born baby is ______.     –BCG

75.    Which are phagocytes in liver?     – Kupffer cells

76.    Which gland disapear during old age?     –Thymus

77.    The study of Dendrology is associated with___?     –Trees

78.    Theory of natural selection was proposed by_______.     –Charles Darwin

79.    By which doctor was the first successful heart transplant in India performed?     –Dr. Venugopal

80.    The food poisoning is caused by_______.     –Clostrideam boutulium

81.    Which acid is found in ‘Tomato’?     –Oxalic Acid

82.    Haematopoiesis take place in _____?     –Bone marrow

83.    Which part of human brain is affected by alcohol?     –Cerebellum

84.    Ascariasis is caused by _______?     –Round Worm

85.    Turpentine oil is obtained from_______?     –Pinus

86.    Which salt is found in bone in largest amount?     –Calcium Phosphate

87.    Genes are made by_______?     –Polynucleotide

88.    Which disease is known as ‘silent killer’?     –High Blood pressure

89.    By whom was oral polio vaccine discovered?     –Jonas Salk

90.    The compound used in anti-malarial drug is_______?     –Chloroquine

91.    Which is responsible for transport of food and other substances in plants?      –Phloem

92.    BCG vaccination (Bacillus Calmette Guerine) is injected to get immunity from_______?   –Tuberculosis

93.    First vaccine produced by bio-technology was used against which virus?      –Hepatitis-B

94.    Alcoholic drink contains_______?     –Ethyl Alcohol

95.    Xerophthalmia is a disease caused by lack of which vitamin?     –Vitamin A

96.    Which is responsible for the process of cell division?     –Mitosis

97.    What is known as ‘Suicidal bags of cell’?     –Lysosome

98.    The plants, which grow under water stress conditions are called_______?      –Xerophytes 

99. Which metal is present in Insulin?      –Zinc

100. Most of the red, blue and purple colours of plants are due to a pigment called_______     –Anthocyanin

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