MCQs on Science
MCQs on Science
Q. Choose the correct option from the alternatives given below each question.
1. Which among the following is not a beverage plant?
(a) Camellia sinensis
(b) Theobroma cacao
(c) Coffea Arabica
(d) Alonsoa grandiflora
Ans: (d)
2. Hemoglobin in humans has the highest affinity for which of the following gases?
(a) Methane
(b) Carbon Monoxide
(c) Nitrous oxide
(d) Carbon dioxide
Ans: (b)
3. Which among the following plant hormone plays most important role in establishing dormancy in seeds?
(a) Ethylene
(b) Gibberellic acid
(c) Abscisic Acid
(d) Auxin
Ans: (c)
4. In Mammalian embryo, which among the following is the outermost membrane that serves as exchange between embryo and environment?
(a) Amnion
(b) Allantois
(c) Chorion
(d) Yolk sac
Ans: (c)
5. What would be the percentage of Glucose in the Urine of a healthy person?
(a) less than 1%
(b) More than 1%
(c) More than 0.1%
(d) 0%
Ans: (d) MCQs on Science
6. The most common use of ‘silicone hydrogels’ is making of which among the following?
(a) Surgery Equipments
(b) Contact Lenses
(c) Breast Transplants
(d) Capsules of medicines
Ans: (b)
7. In which of the following era began the Self replicating RNA molecules on Earth ?
(a) Basin Era
(b) Nectarian Era
(c) Early Imbrian
(d) Cryptic Era
Ans: (a)
8. In human body, the largest amount of the carbon dioxide produced by body cells is carried to the lungs as________:
(a) CO2 attached to haemoglobin in the red blood cells
(b) The bicarbonate ion attached to haemoglobin
(c) CO2 gas in solution in the plasma
(d) Bicarbonate ion dissolved in the plasma
Ans: (d)
9. Which among the following organs open in small intestine through Pylorous?
(a) Stomach
(b) Liver
(c) Pancreas
(d) All the above
Ans: (a)
10. Which among the following contributes to the replenishment of soil?
(a) Bacteria
(b) Fungi
(c) Algae
(d) Earthworm
Ans: (d)
MCQs on Science
11. In which year India was certified as being free of variola (small pox virus) due to Indian national smallpox eradication programme (NSEP) and its intensified version (INSEP)?
(a) 1975
(b) 1977
(c) 1980
(d) 1985
Ans: (b)
12. What is the average life of the Red Blood corpuscles?
(a) 100-120 days
(b) 120-140 days
(c) 80-95 days
(d) 70-85 days
Ans: (a)
13. Which among the following is the only internal human organ which can regenerate?
(a) Pancreas
(b) Kidney
(c) Liver
(d) Spleen
Ans: (c)
14. What is the number of the Chromosomes affected by Turner syndrome?
(a) 44
(b) 45
(c) 46
(d) 47
Ans: (b)
15. Which of the following plant growth hormone was recognized by Japanese scientists?
(a) Auxin
(b) Gibberellins
(c) Abscisic acid
(d) Cytokinin
Ans: (b)
16. What name has been given to the fear of crossing roads?
(a) Arthrophobia
(b) Atychiphobia
(c) Aichmophobia
(d) Agoraphobia
Ans: (d)
17. Overdose of antibiotics will cause the suppression of synthesis of which among the following vitamins in human body?
(a) Vitamin A
(b) Calciferol
(c) Vitamin K
(d) Biotin
Ans: (d) MCQs on Science
18. The Bovine spongiform encephalopathy (BSE) is commonly known as _______?
(a) Foot & Mouth Disease
(b) Mad Cow Disease
(c) Fog fever
(d) Creutzfeldt-Jakob disease
Ans: (b)
19. Which of the following is / are connective tissues?
1. Bones
2. Ligaments
3. Cartilage
4. Blood
5. Muscle
Select the correct option from the codes given below:
(a) Only 1, 2 & 3
(b) Only 1, 2, 3 & 4
(c) Only 1, 2, 3 & 5
(d) 1, 2, 3, 4 & 5
Ans: (b)
20. Consider the following:
1. Glucose
2. Light
3. CO2
4. Water
5. Oxygen
Which among the above are essential for photosynthesis?
(a) Only 1, 2 & 3
(b) Only 2, 3 & 4
(c) Only 3 & 4
(d) Only 3, 4 & 5
Ans: (b)
MCQs on Science
21. Which of the following disease(s) is/are caused by bacterial infection?
1. Tuberculosis
2. Dengue
3. Japanese encephalitis
4. Chickenpox
5. Diphtheria
6. Jaundice
Select the correct option from codes given below:
(a) 1, 2 and 3 Only
(b) 1 & 5 Only
(c) 1, 5 & 6 Only
(d) 1, 2, 3, 4, 5 and 6
Ans: (b)
22. In the human digestive system, which among the following organs secrete digestive enzymes?
1. Mouth
2. Stomach
3. Gall bladder
4. Small intestine
Select the correct option from the codes given below:
(a) Only 1 & 2
(b) Only 2 & 3
(c) Only 1, 2 & 4
(d) 1, 2, 3 & 4
Ans: (c)
23. In which of the following class can we put Adrenaline?
(a) Fat
(b) Hormone
(c) Enzyme
(d) Protein
Ans: (b)
24. Which of the following forms of Nitrogen is taken up by Higher Plants?
(a) Nitrites only
(b) Nitrates only
(c) Nitrates and Ammonium
(d) Urea
Ans: (a) MCQs on Science
25. In which of the following cycles, insects play crucial role?
1. Carbon cycle
2.Nitrogen Cycle
3. Food cycle
Select the correct option from the codes given below:
(a) Only 1 & 2
(b) Only 2 & 3
(c) Only 1 & 3
(d) 1, 2 & 3
Ans: (d)
26. What is the role of Pneumatophores?
(a) Protect plant from animals
(b) Supports plant in standing upright
(c) Get oxygen for respiration
(d) Helps plant for pollination
Ans: (c)
27. Which component in tobacco makes it harmful for human consumption?
(a) Nicotine
(b) Heroin
(c) Morphine
(d) None of the above
Ans: (a)
28. How does a Unicellular Organism reproduce?
(a) Cell reproduction
(b) Cell division
(c) Fragmentation
(d) Cell synthesis
Ans: (b)
29. Which of the following can be checked by doctors with the help of Pulse reading?
(a) Temperature
(b) Heart beat
(c) Blood pressure
(d) Respiration rate
Ans: (b)
30. Which of the following is the most common use of the reserprine derived from the plant ‘Serpentina’?
(a) Alleviate pain
(b) Alleviate high blood pressure
(c) Alleviate low blood pressure
(d) Cure rickets
Ans: (b)
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31. What is the meaning of the term ‘Test Tube Baby’?
(a) Fertilisation of ovum takes place in the test tube but it develops in uterus
(b) Fertilisation of ovum takes place in the test tube and develops in the test tube itself
(c) Fertilisation of the ovum takes place in the uterus but develops in the test tube
(d) Fertilisation takes place in uterus and embryo develops in uterus
Ans: (a)
32.Consider the following pairs:
1. Sweat – Eccrine glands
2. Tears – Lacrimal glands
3. Neurohormones – Hypothalamus
Which of the above is/are correct?
(a) 1 & 2 Only
(b) 2 Only
(c) 2 & 3 Only
(d) 1, 2 & 3
Ans: (d)
33. Who among the following scientists is known for devising four criteria designed to establish a causal relationship between a causative microbe and a disease?
(a) Louis Pasteur
(b) Emil Behring
(c) I Pavlov
(d) Robet Koch
Ans: (d)
34. Penicillin’ which is used as an antibiotic is obtained from :
(a) Bacteria
(b) Fungi
(c) algae
(d) Lichens
Ans: (b)
35. In human body, where do you find the Cone cells and Rod cells?
(a) Retina of the eye
(b) Gallbladder
(c) Esophagus
(d) Villi in the small intestine
Ans: (a)
36. The proceedings under the Insolvency and Bankruptcy Code has been suspended till which month after September 2020?
(a) November 2020
(b) December 2020
(c) January 2020
(d) March
Ans: (b)
37. Consider the following:
1. Heart
2. Blood vessels
3. Tendrons
Which of the above are components of human circulatory system?
(a) 1 & 3 Only
(b) 1 & 2 Only
(c) 2 & 3 Only
(d) 1, 2 & 3
Ans: (b) MCQs on Science
38. Which of the following are not parts of hindbrain in humans?
1. Spinal cord
2. Cerebellum
3. Hypothalamus
4. Basal Ganglia
Select the correct option from codes given below:
(a) 1, 3 & 4 Only
(b) 1, 2 & 3 Only
(c) 1, 2 & 4 Only
(d) 1, 2, 3 & 4
Ans: (a)
39. Pest-resistant cotton commonly known as ‘Bt-Cotton’ is genetically engineered by inserting a gene from a:
(a) Bacterium
(b) Virus
(c) Microalgae
(d) Protist
Ans: (a)
40. Human Papilloma Virus is related to which of the following diseases?
(a) Prostate Cancer
(b) Cervical Cancer
(c) Lymphatic Filariasis
(d) Leukemia
Ans: (b)
MCQs on Science
41. Which of the following Vitamins of the ‘B-Complex’ are correctly paired with their respective names?
1. Vitamin B2 – Riboflavin
2. Vitamin B3 – Niacin
3. Vitamin B7 – Biotin
4. Vitamin B12 – Cyanocobalamine
Select the correct answer from the codes given below:
(a) 2 and 4
(b) 3 and 4
(c) 1, 3 and 4
(d) All of them
Ans: (d)
42. MON 863 is a genetically engineered variety of which among the following?
(a) Soya Bean
(b) Maize
(c) Rice
(d) Tomato
Ans: (b)
43. William Harvey, Alexander Fleming & Louis Pasteur are related to respectively …………. ?
(a) Vaccination, Blood Circulation, Penicillin
(b) Penicillin, Blood circulation , Vaccination
(c) Blood Circulation, Penicillin, Vaccination
(d) Vaccination,Blood Circulation, Penicillin
Ans: (c)
44. Anemophily’ is pollination by :
(a) Birds
(b) Wind
(c) Ants
(d) Bats
Ans: (b)
45. Pancreas’ functions as an:
1. Endocrine gland
2. Exocrine gland
(a) Only 1
(b) Only 2
(c) Both 1 and 2
(d) Neither 1 nor 2
Ans: (c)
46. Sugar, Amino Acids, & Nucleotides are constituents of respectively ______ ?
(a) Polysaccharides, Proteins. Nucleic Acids.
(b) Proteins, Carbohydrates, Fats.
(c) Nucleic Acids. Proteins, Polysaccharides.
(d) Polysaccharides, Nucleic Acids, Proteins.
Ans: (a) MCQs on Science
47. Prophase, metaphase, anaphase & telophase are the stages of which of the following process?
(a) Mitosis / Meiosis
(b) Asexual reproduction
(c) sexual reproduction
(d) Cell metabolism
Ans: (a)
48. Down Syndrome is also known as:
(a) Edwards syndrome
(b) Patau syndrome
(c) Mongolism
(d) None of the above
Ans: (c)
49. What is the PH of H2O?
(a) 6
(b) 7
(c) 8
(d) 9
Ans: (b)
50. Which of the following gas is reduced in the reduction process?
(a) Oxygen
(b) Helium
(c) Carbon
(d) Hydrogen
Ans: (d)
MCQs on Science
51. Which of the following gland is present in the human mouth?
(a) Adrenal
(b) Pituitary
(c) Gonads
(d) Salivary
Ans: (d)
52. Name the gland which is present above our kidneys?
(a) Adrenal
(b) Pituitary
(c) Gonads
(d) Salivary
Ans: (a)
53. What is the basic unit of our neural system?
(a) Neutron
(b) Neuron
(c) Nephron
(d) Nucleon
Ans: (b)
54. Which of the following compound is mainly used in hand sanitizer?
(a) Aldehyde
(b) Acetic acid
(c) Alcohol
(d) Ketone
Ans: (c) MCQs on Science
55. What is the S.I. unit of frequency?
(a) Diopter
(b) Second
(c) Hertz
(d) Meter
Ans: (c)
56. Acid turns blue litmus paper into which color?
(a) Black
(b) Blue
(c) Red
(d) Orange
Ans: (c)
57. Which of the following enzymes is not present in the human stomach?
(a) Pepsin
(b) Hydrochloric acid
(c) Mucus
(d) Trypsin
Ans: (d)
58. What is the basic unit of our excretory system?
(a) Neutron
(b) Neuron
(c) Nephron
(d) Nucleon
Ans: (c)
59. What is the unit of wavelength?
(a) Hertz
(b) Diopter
(c) Faraday
(d) Meter
Ans: (d)
60. What is the color of AgBr?
(a) Blue
(b) Brown
(c) White
(d) yellow
Ans: (d)
MCQs on Science
61. The restriction endonuclease has a defense mechanism in the bacterial system against foreign DNA such as viruses. But how can it protect its DNA?
(a) By methylation of bacterial DNA by restriction enzyme
(b) By methylation of foreign DNA by restriction enzyme
(c) By phosphorylation of bacterial DNA by restriction enzyme
(d) By phosphorylation of foreign DNA by restriction enzyme
Ans: (a)
62. Even after replication, how the modified DNA remains protected?
(a) It remains protected because of the conservative mode of replication
(b) It remains protected because of the semi-conservative mode of replication
(c) The mode of replication has no role to play in the protection
(d) It is again modified after replication
Ans: (b)
63. After cleaving the sequence, the nature of the ends created by the type II endonuclease is __________ .
(a) The ends created are always single-stranded
(b) The ends created are always double-stranded
(c) Either the ends are single-stranded, or they are double-stranded
(d) One end is single-stranded, and one end is double-stranded
Ans: (c)
54. If all the nucleotides are present with equal frequencies and at random, what are the chances of having a particular four nucleotide long motif?
(a) 1/256
(b) 1/64
(c) 1/16
(d) 1/8
Ans: (a) MCQs on Science
65. Which of the following is the correct terminology of a restriction enzyme obtained from the first activity of strain R of Escherichia coli?
(a) EcoR1
(b) EscRI
(c) EcorI
(d) EcoRI
Ans: (d)
66. In the case of electrophoresis of single-stranded DNA or RNA, which type of gels are used?
(a) Renaturing
(b) Denaturing
(c) The routine agarose gel
(d) The routine polyacrylamide gel
Ans: (b)
67. The ratio of a mass concentration of species A to the total mass density of the mixture is known as
(a) Concentration
(b) Mass Density
(c) Mole fraction
(d) Mass Fraction
Ans: (d)
68. If only one bond is broken in the sugar-phosphate backbone, it is called as …………. .
(a) gap
(b) nick
(c) break
(d) leakage
Ans: (b)
69. The sticky ends are held together by which type of bonds?
(a) Hydrogen bond
(b) Covalent bond
(c) Ionic bond
(d) Van-der-Waal forces
Ans:(a)
70. If a ligation reaction is being carried out and recircularization is observed, which type of reaction is being carried out?
(a) Intramolecular
(b) Intermolecular
(c) Both observe recircularization equally
(d) Recirculation is not possible in any of the cases
Ans: (a)
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71. Topoisomerase is also an enzyme that is used for carrying out ligation. The correct statement for topoisomerase is?
(a) They act only on double-stranded molecules
(b) They alter the degree of supercoiling of DNA molecules
(c) They are less effective than conventional DNA ligase
(d) There are three types of topoisomerases
Ans: (b)
72. Transformation carried out using a particle gun is known as biolistic transformation. It falls under which category of transformation?
(a) Physical
(b) Chemical
(c) Electroporation
(d) Natural
Ans: (a)
73. Isolation of genomic DNA follows the same principles as obtaining plasmid from E. coli. Which of the following is not included in it?
(a) Cell lysis
(b) Removal of proteins
(c) Removal of chromosomal DNA
(d) Dissolving plasmid in water
Ans: (d) MCQs on Science
74. Adsorption onto a solid phase support followed by elution is used as an alternative for separation of which component?
(a) chromosomal DNA
(b) plasmid DNA
(c) RNA alone
(d) other impurities
Ans: (b)
75. Which of the following components bind to the solid column made of silica under high salt concentration?
(a) Proteins
(b) Polysaccharides
(c) Both proteins and polysaccharides
(d) Plasmid DNA
Ans: (d)
76. Which of the following components settles at the bottom?
(a) RNA
(b) Proteins
(c) Nicked DNA
(d) Supercoiled DNA
Ans: (a)
77. Which one of the following will travel fastest through the gel if the amount of DNA present is the same in all?
(a) Circular
(b) Supercoiled and circular will move at the same speed and faster than nicked
(c) Nicked
(d) Supercoiled
Ans: (d)
78. The ratio of the number of moles of species A to the total number of moles of the mixture is known as
(a) Mole fraction
(b) Mass fraction
(c) Partial pressure
(d) Mass density
Ans: (a)
79. What is the value of emissivity for polished aluminum?
(a) 0.01
(b) 0.02
(c) 0.03
(d) 0.04
Ans: (c)
80. The restriction endonuclease has a defense mechanism in the bacterial system against foreign DNA such as viruses. But how is it able to protect its DNA?
(a) By methylation of bacterial DNA by restriction enzyme
(b) By methylation of foreign DNA by restriction enzyme
(c) By phosphorylation of bacterial DNA by restriction enzyme
(d) By phosphorylation of foreign DNA by restriction enzyme
Ans: (a)
MCQs on Science
81. Even after replication, how the modified DNA remains protected?
(a) It remains protected because of the conservative mode of replication
(b) It remains protected because of the semi-conservative mode of replication
(c) The mode of replication has no role to play in the protection
(d) It is again modified after replication
Ans: (b)
82. Which one has the least density?
(a) Ice
(b) Pyrex
(c) Paraffin
(d) Marble
Ans: (a)
83. What is the density of snow in kg/m3?
(a) 100
(b) 110
(c) 120
(d) 130
Ans: (b)
84. What is the density of limestone in kg/m3?
(a) 2320
(b) 2430
(c) 2530
(d) 2630
Ans: (a)
85. What is the melting point of chromium?
(a) 2118 K
(b) 2218 K
(c) 2318 K
(d) 2418 K
Ans: (a) MCQs on Science
86. After cleaving the sequence, the nature of the ends created by the type II endonuclease is ______ .
(a) The ends created are always single-stranded
(b) The ends created are always double-stranded
(c) Either the ends are single-stranded, or they are double-stranded
(d) One end is single-stranded, and one end is double-stranded
Ans: (c)
87. If all the nucleotides are present with equal frequencies and at random, what are the chances of having a particular four nucleotide long motif?
(a) 1/256
(b) 1/64
(c) 1/16
(d) 1/8
Ans: (a)
88. Which one is having the lowest value of diffusivity?
(a) Acetic acid
(b) Oxygen
(c) Benzene
(d) Toluene
Ans: (d)
89. Which one is having the lowest value of diffusivity?
(a) Glucose
(b) Urea
(c) Ethanol
(d) Oxygen
Ans: (a)
90. Which one has the highest density?
(a) Snow
(b) Teflon
(c) Soil
(d) Sand
Ans: (b)
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91. Which one has the highest melting point?
(a) Bismuth
(b) Beryllium
(c) Cadmium
(d) Copper pure
Ans: (b)
92. Which one has a maximum melting point?
(a) Palladium
(b) Magnesium
(c) Platinum pure
(d) Lead
Ans: (c)
93. Which one has a minimum melting point?
(a) Titanium
(b) Zinc
(c) Uranium
(d) Rhodium
Ans: (b)
94. The Concentration of the two phases in a closed system at the Interphase is
(a) Changes continuously
(b) Never changes
(c) Becomes zero
(d) Increases till the driving force becomes zero
Ans: (b)
95. The equilibrium concentrations in the gas and the liquid phases, in mole fraction, give rise to a curve known as
(a) Equilibrium distribution curve
(b) Equilibrium concentration curve
(c) Differential distribution curve
(d) Differential concentration curve
Ans: (a)
96. A device where two insoluble phases are brought into contact is known as
(a) Trays
(b) Stage
(c) Cascade
(d) Sieves
Ans: (b)
97. During gas dispersion, if a chemical reaction between the gas and liquid phase is needed, then the preferred equipment is
(a) Agitated vessel
(b) Sparged vessel
(c) Tray tower
(d) Wetted wall column
Ans: (a)
98. In a certain process, there is a variation in the driving force between the phases. Such a process is
(a) Batch process
(b) Semi-batch process
(c) Continuous process
(d) Isothermal process
Ans: (a)
99. Assume an ideal solution with pure component A, has a vapor pressure of 300 mmHg and a total pressure of 1atm. The concentration in terms of mole ratio is
(a) 0.65
(b) 0.28
(c) 0.39
(d) None of the above
Ans: (a)
100. The driving force line between the operating line and the equilibrium line depends on
(a) Relative diffusion resistance
(b) Relative mass resistance
(c) Cumulative resistance
(d) None of the mentioned
Ans: (a) 0 0 0.
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