PSC EVERY DAY SCIENCE QUESTIONS AND ANSWERS
EVERY DAY SCIENCE QUESTIONS AND ANSWERS / PSC Questions and Answers:- PSC Degree Level Questions and Answers - KAS Questions and Answers / PSC New Pattern Syllabus Question
* PSC Exam Questions and Answers
1. Entomology is the science that studies
(a) Behavior of human beings
(b) Insect s
(c) The origin and history of technical and scientific terms
(d) The formation of rocks
Answer: (b)
3. Trachoma is a disease of the
(a) Brain (b) Larynx
(c) Ear (d) Eye
Answer: (d)
3. Fathom is the unit of measurement of
(a) Depth of water (b) Flow of water
(c) Volume of water (d) Density of water
Answer: (a)
4. All of the following diseases are caused by viruses, except
(a) Jaundice (b) Influenza
(c) Typhoid (d) Mumps
Answer: (c)
5 Plant s make their food by the process called photosynthesis. Which of the following are needed in this process?
(a) Sunlight, water and nitrogen
(b) Sunlight, water and hydrogen
(c) Sunlight, water and oxygen
(d) Sunlight, water and carbon dioxide
Answer: (d)
6. Which of the following devices is needed for converting alternating current into direct current?
(a)Dynamo (b) Rectifier
(c) Transformer (d) Transducer
Answer: (b)
7. All of the following organs in the human body are located both on the right and the left sides, except
(a) Lungs (b) Kidneys
(c) Spleen (d) Eyes
Answer: (c)
8. Some organs in the human body lie partly on the left side and partly on the right side. An example of this is
(a) Heart (b) Pancreas
(c) Spleen (d) None of the above
Answer: (b)
9. Physiology is the study of the
(a) Structure of the body (b) Cells in the body
(c) Functions of the human body (d) All of the above
Answer: (c)
10. All of the following are closely allied to Physiology, except
(a) Bio-chemistry (b) Cytology
(c) Entomology (d) Physics
Answer: (c)
11. Sodium depletion occurs in excessive sweating, and cannot be corrected by drinking water alone. When uncorrected, it may lead to
(a) Muscle cramps, loss of energy, fatigue and faintness
(b) Increase of urea in the blood
(c) Swelling of ankles and feet
(d) Renal failure
Answer: (a)
12. Which of the following regulates and controls the entry of light into the human eye?
(a) Anterior chamber (b) Cornea
(c) Iris (d) Retina
Answer: (c)
13. Retina in the eye acts as a
(a) Lens in the camera (b) Shutter in the camera
(c) Film in the camera (d) None of the above
Answer: (a)
14. The heart of a normal adult human being weighs about
(a) 200 grams (b) 300 grams
(c) 400 grams (d) 500 grams.
Answer: (b)
15. In a normal human adult (at resting position), how much blood does the heart pump per minute?
(a) 1 litre(b) 3 litre
(c) 5 litre(d) 7 litre
Answer: (c)
16. A term that may be applied to all disease-producing micro-organisms lS
(a) Pathogenic (b) Saprophytic
(c) Stapto-Cocci (d) Viruses
Answer: (a)
17. The chief food of a male mosquito is
(a) Decaying organic matter
(b) Leaves of plant s
(c) Nectar and fruit juices
(d) Micro-organisms found in water
Answer: (c)
18. In certain diseases antibiotics are administered. The object is to
(a) Stimulate production of white blood cells for fighting the disease
(b) Stimulate the production of antibodies
(c) Inhibit the growth of bacteria
(d) Produce toxins against bacteria
Answer: (c)
19. Sulfa drugs are effective against diseases caused by
(a) Bacteria (b) Glandular upsets
(c) Vitamin deficiency (d) Worms
Answer: (a)
20. A substance used for destroying micro-organisms and rendering the material sterile is called
(a) An antibody (b) An antitoxin
(c) An antigen (d) A disinfectant
Answer: (d)
21. Which of the following organisms causes Tuberculosis?
(a) Bacillus (b) Cocci
(c) Protozoan (d) Virus
Answer: (a)
22. Which of the following organisms causes Pneumonia?
(a) Bacillus (b) Cocci
(c) Protozoan (d) Virus
Answer: (b)
23. Which of the following organisms causes the common cold?
(a) Bacillus (b) Cocci
(c) Protozoan (d) Virus
Answer: (d)
24. Which of the following organisms causes Cholera?
(a) Bacillus (b) Cocci
(c) Protozoan (d) Virus
Answer: (a)
25. The chief food of a housefly is
(a) Decaying organic matter
(b) Leaves of plants
(c) Nectar of flowers
(d) Micro-organisms found in water
Answer: (a)
26. The Chief food of a mosquito larva is
(a) Decaying organic matter
(b) Leaves of plant s A
(c) Nectar and fruit juices
(d) Micro-organisms found in water
Answer: (d)
27. The chief food of a butterfly larva is
(a) Decaying organic matter (b) Leaves of plant s
(c) Nectar of flowers (d) Microorganisms found in water
Answer: (b)
28. The part of the body directly affected by Ricket s is
(a) Bone tissue (b) Epidermal tissue
(c) Nervous system (d) Respiratory system
Answer: (a)
29. The part of the body directly affected by Pneumonia is
(a) Bone tissue (b) Epidermal tissue
(c) Nervous system (d) Respiratory system
Answer: (d)
30. The part of the body directly affected by Rabies is
(a) Bone tissue (b) Epidermal tissue
(c) Nervous system (d) Respiratory system
Answer: (c)
31. The part of the body directly affected by Beri Beri disease is
(a) Nervous system (b) Epidermal tissue
(c) Respiratory system (d) Bone tissue
Answer: (a)
32. The element Nitrogen is found in
(a) Carbohydrates (b) Fat s
(c) Proteins (d) None of the above
Answer: (c)
33. As the amount of clay in soil increases, its water-retaining capacity
(a) Decreases (b) Increases
(c) Remains unchanged
Answer: (b)
34. As the number of micro-organisms in soil increases, the amount of humus in the same soil
(a) Increases (b) Decreases
(c) Remains unchanged (d) None of these
Answer: (a)
35. Which of the following plants adds more oxygen to the atmosphere than it removes?
(a) Bread mould (b) Corn
(c) Mushroom (d) Yeast
Answer: (b)
36. Which of the following blood groups of human beings is a universal donor?
(a) AB (b) A
(c) B (d) O
Answer: (d)
37. It is customary to transfuse the blood of the same group as that of the patient, and only in an emergency to give the blood of the donor whose blood group is
(a) O (b) A
(c) B (d) AB
Answer: (a)
38. Haemoglobin in the blood is a complex protein rich in
(a) Copper (b) Gold
(c) Iron (d) Silver
Answer: (c)
39. Haemoglobin is rich in a mineral that has great affinity for
(a) Carbon dioxide (b) Chlorine
(c) Hydrogen (d) Oxygen
Answer: (d)
40. Amino acids are a product of the digestion of
(a) Carbohydrates (b) Fat s
(c) Proteins (d) Vitamins
Answer: (c)
41. Which of the following is a starch digesting enzyme?
(a) Insulin (b) Ptyalin
(c) Lipase (d) Renin
Answer: (b)
42. Which of the following has the highest fat content?
(a) Milk (b) Potato
(c) Rice (d) Sugar
Answer: (a)
43. Which one of the following secretions does not contain enzymes?
(a) Gastric juice (b) Saliva
(c) Pancreatic juice (d) Bile
Answer: (d)
44. Which of the following is the product of the digestion of proteins?
(a) Amino acids (b) Alcohol
(c) Carbon dioxide (d) Lactic acid
Answer: (a)
45. Pepsin, a digestive enzyme, is produced in the
(a) Liver (b) Small intestine
(c) Stomach (d) None of the above
Answer: (c)
46. Corn kernels are seeds and contain digestive enzymes which convert starch into
(a) Glucose (b) Glycol
(c) Lactose (d) Sucrose
Answer: (a)
47. The kidneys in the human body
(a) Regulate the water balance in the body
(b) Regulate the concentration of the salt s in the blood and of the reaction (acid-base balance) of the blood
(c) Excrete waste products and any excess of salt s
(d) All of the above
Answer: (d)
48. Which of the following is nearly a complete food by itself‘?
(a) Cheese (b) Milk
(c) Meat (d) Rice
Answer: (b)
49. Which of the following foods (one ounce of an edible raw portion of each) provides the largest number of Kcal? Of energy?
(a) Cheese (b) Meat
(c) Margarine (d) Wheat
Answer: (c)
50. If you wish to have the maximum value of in respect of Vitamin D, which of the following would you choose?
(a) Cheese (b) Meal
(c) Milk (s) Rice
Answer: (a)
51. All of the following foods lack vitamin C, except
(a) Cheese (b) Milk
(c) Meat (d) Rice
Answer: (b)
52. Which of the following statements is not correct?
(a) Pepsin is produced in the glands in the lining- of the stomach
(b) Vegetable fats contain enough vitamin A and D
(c) Amino acids are a product of the digestion of proteins
(d) Vitamin C is most plentiful in citrus fruits.
Answer: (b)
53. All of the following statements are correct, except
(a) Proteins are an essential part of living cells
(b) Enzymes help the digestion by chemical means, acting as catalysts speeding up reactions
(c) Bile contains enzymes
(d) Lipase breaks up fats into fatty acids and glycerol
Answer: (c)
54. The vitamin concerned with blood clotting is
(a) Vitamin C (b) Vitamin D
(c) Vitamin A (d) Vitamin K
Answer: (d)
55. When there is a decrease in the concentration of oxygen in the blood, the rate of breathing
(a) Decreases (b) Increases
(c) Does not change
(d) Increases or decreases depending on the density of blood
Answer: (b)
56. The skin is an excretory organ. Which of the following substances is not excretory material?
(a) Oil (b) Urea
(C) Salt s (d) Water
Answer: (a)
57. Camels have greater adaptability to long periods of drought in hot deserts than other animals. This is because
(a) They have a large hump where also they can store water
(b) Its thick fur insulates its body against high external temperatures and reduces water loss
(c) Camels have a large rumen
(d) Camels can drink very fast, as much as 1/3 of their body weight
Answer: (b)
58. All the following facts about camels make them adapt to long periods of drought in hot deserts, except
(a) Camels do not sweat until the external temperature rises to about 41°C, which is much higher than for most mammals
(b) Camels can survive a loss of up to 40 for per cent of their body water; for most mammals, this limit is 20 per cent
(c) The camel’s thick fur insulates its body against high temperatures thereby reducing water loss
(d) Camels can drink as much as 1/3 of their body weight in ten minutes, which other mammals cannot
Answer: (d)
59. Babies should be always kept at a reasonably warm temperature
whereas adults can withstand extreme cold. The reason for this is that
(a) They have a large surface area to volume ratio; hence they lose much more heat than they produce
(b) They have a large volume to surface area ratio which results in loss of body heat greater than they produce
(c) They sweat more than the adults, lowering their body temperature
(d) Their skin is more porous than that of the adult s
Answer: (a)
60. A newly born normal child will thrive best if it is given milk of
(a) Cow (b) Goat
(c) Mother (d) Skimmed milk
61. Excretory products of mammals are useful to plants. Which of the following is not a part of such secretions?
(a) Bile pigment s (b) Mineral salt s
(c) Carbon dioxide (d) Urea
Answer: (b)
62. Molasses are a
(a) By-product of the fertiliser industry
(b) Synthetic commodity
(c) By-product of the edible oil industry
(d) By-product of the sugar industry
Answer: (d)
63. A flaming splinter is thrust into a bottle of oxygen, a bottle of nitrogen, and a bottle of carbon dioxide. The flame will go out in
(a) Nitrogen and carbon dioxide but not in oxygen
(b) Oxygen and nitrogen but not in carbon dioxide
(c) Oxygen and carbon dioxide but not in nitrogen
(d) Each case
Answer: (a)
64. The phases of the moon are partially the result of the
(a) Changes in the shape of the moon
(b) Revolution of the moon about the earth
(c) Variations in the moon’s gravitation
(d) Variation in the speed of rotation of the moon
Answer: (b)
65. The statutory warning "Cigarette smoking is injurious to health that appears on cigarette packet is based on the finding that
(a) Tobacco plant suffers from mosaic virus disease which is communicated by smoking
(b) Smoking and drinking cause mystery diseases
(c) Lung and oral cancer are more common among smokers than non-smokers
(d) More smokers stiffer from diabetes than non-smokers
Answer: (c)
66. Which of the following processes does not increase the amount of carbon dioxide in the air?
(a) Breathing (b) Decay of vegetation
(c) Petrol bumping (d) Photosynthesis
Answer: (d)
67. Which of the following processes is unsuitable for softening water possessing temporary hardness?
(a) Boiling (b) Filtration
(c) Adding calcium hydroxide (d) Distillation
Answer: (c)
68. A green leaf is partially covered and placed in the light for several days. If it is then boiled and tested for starch with iodine, what will be the result?
(a) Starch will be found only in the part of the leaf exposed to light
(b) A Starch will be found in the entire leaf
(c) Starch will be found only in the shaded part of the leaf
(d) Starch will not be found in the leaf at all
Answer: (a)
69. All of the following glands in the human body are ductless glands, except
(a) Adrenal (b) Pituitary
(c) Lachrymal (d) Thyroid
Answer: (c)
70. A body that is falling freely from a height (no air resistance) under the influence of gravity --------------
(a) Falls about 32 ft. during each second
(b) Increases its speed by about 32 ft/sec. during each second it falls
(c) Falls about 32 f t. during the first second after it starts to fall from rest
(d) Will increase its speed more during the fifth second of fall than during the first second
Answer: (b)
71. A difference between a compound and a mixture is that a compound
(a) (Is composed of molecules whereas a mixture is not
(b) Is much more easily broken down into its component elements than a mixture
(c) Is always solid" whereas a mixture may be a liquid, a solid, or a gas
(d) Always has the same composition whereas a mixture does not
Answer: (d)
72. A person, who met with an accident, was partially paralysed and lacked a sense of feeling after treatment. Which part of the nervous system was affected by the accident?
(a) The left cerebral hemisphere was damaged
(b) The spinal cord seemed damaged
(c) The olfactory lobes seemed to have become defective
(d) The coulometer nerve seemed damaged
Answer: (b)
73. On a cool and wet day a large quantity of dilute urine is passed out by most people. This is because
(a) The body temperature also decreases, resulting in the formation of more quantity of urine
(b) The body absorbs less water when the temperature is low
(c) There is reduced loss of water through sweat
(d) Retentive power of bladder decreases ‘on account of contraction
Answer: (c)
74. Through which of the following media does light travel fastest?
(a) Vacuum (b) Water
(c) Glass (d) Air
Answer: (a)
75. Excessive intake of polished rice causes deficiency of
(a) Vitamin A (b) Vitamin B
(c) Vitamin D (d) Vitamin K
Answer: (b)
76. The white blood cells, which play a very important role in protecting the body against disease-producing organisms
(a) Are larger in size and fewer in number than the red blood cells
(b) Have the same size but are fewer in number than the red blood cells
(c) Are larger in size and have nearly the same number as the red blood cells
(d) Have the same size and the same number as the blood cells
Answer: (a)
77. Which of the following is essential for the plants to help them in the formation of chlorophyll?
(a) Calcium V (b) Magnesium
(c) Potassium (d) Phosphorus
Answer: (b)
78. What is the range of heartbeat of a normally healthy person per minute?
(a) 90 - 100 times (b) 80 - 90 times
(c) 70 - 80 times (d) 60 - 70 times
Answer: (c)
79. A solid piece of iron sinks in water but floats in mercury. This is because the
(a) Average density of water and mercury is less than that of iron
(b) Density of iron is less than that of water as well as mercury
(c) Density of iron is more than that of water as well as mercury
(d) Density of iron is more than that of water but less than that of mercury
Answer: (d)
80. In a normal healthy body, the number of red cells or erythrocytes in each cubic millimetre of blood is
(a) 40 lakhs (b) 50 lakhs
(c) 60 lakhs (d) 70 lakhs
Answer: (b)
81. The average life of a red blood cell in the body is about
(a) 95 days (b) 105 days
(c) 115 days (d) 130 days
Answer: (c)
82. The red blood cells originate in the
(a) Bone marrow (b) Brain
(c) Ligaments (d) Muscles
Answer: (a)
83. The amount of haemoglobin present in the blood is about 15 gm per 100 ml. blood and this amount is usually called'l00 per cent’. What percentage is considered normal?
(a) 70 per cent (b) 80 per cent
(c) 85 per cent (d) over 90 per cent
Answer: (d)
84. Which of the following is used as a preservative of food articles?
(a) Sodium benzoate (b) Sodium bicarbonate
(c) Sodium carbonate (d) Sodium chloride
Answer: (a)
85. The lustre of the diamond is due to
(a) Reflection (b) Tot al internal reflection
(c) Refraction (d) it’s being the purest form of carbon
Answer: (b)
86. Milk in natural form has a certain amount of sugar. This sugar is called
(a) Glucose (b) Fructose
(c) Lactose (d) Sucrose
Answer: (c)
87. 'Simulation of blood’ in the body was discovered by
(a) Joseph Lister (b) Robert Hooke
(c) Jonas Salk (d) William Harvey
Answer: (d)
88. Which of the following is a source of ready energy that an athlete can use after strenuous exercises?
(a) Glucose (b) Milk
(c) Sucrose (d) Tomato soup
Answer: (a)
89. DNA is
(a) Acetic acid (b) Citric acid
(c) A class of nucleic acids (d) An enzyme
Answer: (c)
90. Rust is a disease that affects s wheat. It is caused by
(a) Bacteria (b) Fungi
(c) Virus (d) None of the above
Answer: (b)
91. On a hot day if you are sweating, you will feel cooler than on a cooler moist day. This is because %
(a) There is loss of energy when you sweat
(b) On a cooler moist day you lose less energy.
(c) The evaporation of sweat on a cooler moist day raises the body temperature
(d) The evaporation of sweat on a hot day causes more Cooling.
Answer: (d)
92. The other name of Vitamin C is
(a) Formic acid (b) Acetic acid
(c) Ascorbic acid (d) Riboflavin
Answer: (c)
93. Who is credited with the discovery of neutrons?
(a) Chadwick (b) Bohr
(c) Newton (d) Rutherford
Answer: (a)
94. Benzene hexachloride (BHC) is used by farmers for
(a) Removing salinity of the soil
(b) Killing harmful insect s
(c) Making up the mineral deficiency
(d) Making the soil rich in nitrogen
Answer: (b)
95. Who, amongst the following, is credited with the discovery of penicillin?
(a) Edward Jenner (b) Louis Pasteur
(c) Alexander Flemings (d) William Harvey
Answer: (c)
96. Which of the following statements regarding the use of mercury in thermometers is not correct?
(a) It has a low vapour pressure at ordinary temperatures
(b) Being a good conductor of heat it responds more rapidly to changes of temperature
(c) It expands uniformly
(d) It is transparent and can easily be seen in the thermometric tube
Answer: (d)
97. Cellulose is a
(a) Carbohydrate (b) Fat
(c) Protein (d) None of the above
Answer: (a)
98. Lightning flash and thunderbolt occur at one and the same time. In this context, which of the following is correct?
(a) The light is seen after the sound is heard
(b) The sound is heard at the same time as the light is seen
(c) The light is seen first and sound is heard afterwards
(d) Sometimes light is seen first and sometimes sound is heard first
Answer: (c)
99. Which of the following statements into diabetes is not correct?
(a) It is a disease of metabolism
(b) It occurs when the blood sugar level decreases
(c) Proper dose (through injection) of the hormone insulin helps to keep the disease under control
(d) If not controlled, it results in loss of weight
Answer: (b)
100. Which of the following instruments is used for measuring the approximate height above ground level?
(a) Altimeter (b) Anemometer
(c) Manometer (d) Micrometer
Answer: (a)
PSC Solved Question Papers ---> Click here
PSC TODAY's EXAM RESULTS ---> Click here
PSC EXAM PROGRAMME -> Click here
CURRENT AFFAIRS QUESTIONS -> Click here
PSC Degree Level Questions & Answers - Click here
PSC 10th, +2 Level Questions & Answers - Click here
PSC RANK LISTS / SHORTLISTS -> Click here
TEACHING APTITUDE TEST (K-TET, C-TET,, etc.) ---> Click here* SCERT KERALA TEXTBOOKS FOR CLASS II, IV, VI, VIII, IX, X, XII – FREE DOWNLOAD ---> Click here
* NCERT & CBSE TEXTBOOKS FOR ALL CLASSES – FREE DOWNLOAD ---> Click here
* SCERT TEXTBOOKS SOLUTIONS FOR ALL CLASSES ---> Click here
* NCERT & CBSE TEXTBOOKS SOLUTIONS FOR ALL CLASSES ---> Click here
0 Comments