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Biology
Biology is the science of life. From cells and plants to the human body and ecosystems, biology helps us understand how living organisms grow, function, and interact with the environment. Test your knowledge with these simple biology GK questions and improve your general science awareness.
Practice questions 1-25
1. Who is known as the Father of Biology? – Aristotle
2. What is the basic unit of life? – The Cell
3. Which pigment gives plants their green color? – Chlorophyll
4. What is the powerhouse of the cell? – Mitochondria
5. Which blood cells fight infections in the human body? – White Blood Cells (WBC)
6. What is the scientific name of humans? – Homo sapiens
7. Which organ in the human body produces insulin? – Pancreas
8. The largest gland in the human body is? – Liver
9. Which vitamin is produced when skin is exposed to sunlight? – Vitamin D
10. DNA stands for? – Deoxyribonucleic Acid
11. Which blood group is known as the universal donor? – O Negative
12. The study of fungi is called? – Mycology
13. The largest organ in the human body is? – Skin
14. Which part of the plant conducts photosynthesis? – Leaf
15. What is the structural and functional unit of the kidney? – Nephron
16. What is the normal temperature of the human body in Celsius? – 37°C
17. The process by which plants lose water vapor is called? – Transpiration
18. The heart of a human has how many chambers? – Four
19. Who discovered penicillin? – Alexander Fleming
20. Which vitamin deficiency causes night blindness? – Vitamin A
21. Which animal is called the ship of the desert? – Camel
22. Which organ purifies blood in the human body? – Kidney
23. The longest bone in the human body is? – Femur
24. Name the only mammal capable of tr
ue flight. – Bat
25. What is the study of heredity called? – Genetics
Practice questions 26-65
26. Which vitamin helps in blood clotting? – Vitamin K
27. Which blood group is called the universal recipient? – AB Positive
28. Which disease is caused by deficiency of Vitamin C? – Scurvy
29. Which animal lays the largest egg? – Ostrich
30. What is the study of birds called? – Ornithology
31. Which plant is known as the “queen of spices”? – Cardamom
32. Which part of the human brain controls balance? – Cerebellum
33. What is the normal pH of human blood? – Around 7.4
34. Which animal is known as the fastest land animal? – Cheetah
35. Which insect spreads malaria? – Female Anopheles mosquito
36. Which vitamin deficiency causes rickets? – Vitamin D
37. What is the red pigment in red blood cells called? – Hemoglobin
38. What is the study of insects called? – Entomology
39. Which plant is the main source of quinine? – Cinchona
40. What is the lifespan of a red blood cell? – 120 days
41. Which disease is also called Hansen’s disease? – Leprosy
42. Which enzyme is present in saliva? – Amylase
43. Which animal has the longest lifespan? – Tortoise
44. Which vitamin is also known as ascorbic acid? – Vitamin C
45. Which is the largest bird in the world? – Ostrich
46. Which organ stores bile in the human body? – Gallbladder
47. Which part of the plant absorbs water and minerals? – Root
48. Which animal is known as the king of the jungle? – Lion
49. What is the study of fossils called? – Palaeontology
50. Which gland is known as the “master gland”? – Pituitary gland
51. Which metal is present in chlorophyll? – Magnesium
52. What type of blood circulation do humans have? – Double circulation
53. Which virus causes AIDS? – HIV (Human Immunodeficiency Virus)
54. Which animal has a three-chambered heart? – Frog
55. Which vitamin deficiency causes beriberi? – Vitamin B1 (Thiamine)
56. What is the scientific study of cells called? – Cytology
57. Which animal can survive without drinking water? – Camel
58. Which blood cells are called “soldiers of the body”? – White Blood Cells
59. Which disease is caused by deficiency of iodine? – Goitre
60. What is the study of algae called? – Phycology
61. Which is the smallest bone in the human body? – Stapes (in ear)
62. What type of blood circulation is found in fishes? – Single circulation
63. Which protein is present in hair and nails? – Keratin
64. Which
vitamin helps in calcium absorption? – Vitamin D
65. Which human organ has the fastest healing ability? – Skin
Practice questions 66-105
66. Which organelle is known as the control center of the cell? – Nucleus
67. What is the fluid part of blood called? – Plasma
68. Which animal is known as the national aquatic animal of India? – Dolphin
69. Which part of the plant contains seeds? – Fruit
70. What is the study of bacteria called? – Bacteriology
71. Which hormone regulates blood sugar level? – Insulin
72. Which animal is called the ‘flying fox’? – Bat
73. Which part of the human eye controls the amount of light entering? – Iris
74. What is the main function of red blood cells? – Transport oxygen
75. Which part of the human body is affected by pneumonia? – Lungs
76. Which organ in the human body produces bile? – Liver
77. Which vitamin prevents scurvy? – Vitamin C
78. Which animal is known as the national bird of India? – Peacock
79. What is the largest internal organ in the human body? – Liver
80. Which organ helps in the production of sound? – Larynx (Voice box)
81. Which plant is known as the “lung of the Earth”? – Amazon Rainforest (Trees)
82. Which hormone is called the “fight or flight” hormone? – Adrenaline
83. What is the average human blood volume? – 5 to 6 liters
84. What is the study of reptiles and amphibians called? – Herpetology
85. Which vitamin helps in improving eyesight? – Vitamin A
86. Which human organ has the ability to regenerate? – Liver
87. What is the largest mammal in the world? – Blue Whale
88. Which blood cells help in clotting? – Platelets
89. Which insect produces honey? – Honeybee
90. Which gas is released during respiration? – Carbon dioxide
91. Which part of the human skeleton protects the brain? – Skull
92. Which organ is responsible for pumping blood? – Heart
93. What is the study of fish called? – Ichthyology
94. Which disease is caused by Plasmodium parasite? – Malaria
95. Which organ in the human body is affected by jaundice? – Liver
96. Which pigment is responsible for the color of blood? – Hemoglobin
97. What is the scientific name of the tiger? – Panthera tigris
98. Which vitamin deficiency causes pellagra? – Vitamin B3 (Niacin)
99. What is the normal heartbeat rate in humans? – 72 beats per minute (approx.)
100. Which gas do plants release during photosynthesis? – Oxygen
101. What is the green pigment in plants? – Chlorophyll
102. Which is the largest animal on land? – African Elephant
103. Which hormone is also called growth hormone? – Somatotropin
104. Which vitamin helps in strengthening bones? – Vitamin D
105. Which plant is the main source of rubber? – Rubber tree (Hevea brasiliensis)
Practice questions 106-145
106. Which organ in the human body filters waste from the blood? – Kidney
107. Which organ in the body regulates body temperature? – Skin
108. Which is the largest nerve in the human body? – Sciatic nerve
109. What is the life span of white blood cells? – 13–20 days
110. Which blood cells carry oxygen? – Red Blood Cells (RBCs)
111. Which is the only snake that builds a nest? – King Cobra
112. Which hormone is known as the “love hormone”? – Oxytocin
113. Which vitamin deficiency causes scurvy? – Vitamin C
114. Which animal has a pouch to carry its young ones? – Kangaroo
115. Which is the largest land carnivore? – Polar Bear
116. Which is the smallest bird in the world? – Hummingbird
117. What is the normal blood pressure of humans? – 120/80 mmHg
118. Which animal is known as the national animal of India? – Tiger
119. Which blood group is rarest in humans? – AB Negative
120. Which hormone controls sleep? – Melatonin
121. Which part of the brain controls breathing and heartbeat? – Medulla oblongata
122. Which human organ is responsible for detoxification? – Liver
123. Which insect spreads dengue fever? – Aedes aegypti mosquito
124. What is the structural unit of the nervous system? – Neuron
125. Which pigment gives skin its color? – Melanin
126. Which part of the plant anchors it to the soil? – Roots
127. Which animal can change its body color? – Chameleon
128. Which vitamin is essential for blood clotting? – Vitamin K
129. Which animal has no backbone? – Invertebrates
130. Which is the largest invertebrate? – Giant Squid
131. Which organ helps fish in breathing? – Gills
132. Which bird can rotate its head 270 degrees? – Owl
133. Which is the heaviest flying bird? – Kori Bustard
134. Which vitamin is also known as calciferol? – Vitamin D
135. Which part of the cell contains genetic material? – Nucleus
136. Which enzyme digests protein in the stomach? – Pepsin
137. Which animal produces pearls? – Oyster
138. Which blood cells help fight infections? – White Blood Cells
139. Which disease is caused by deficiency of insulin? – Diabetes
140. Which organ stores urine? – Urinary bladder
141. Which gas is exhaled during respiration? – Carbon dioxide
142. Which insect is called a “living fossil”? – Cockroach
143. Which blood component transports nutrients? – Plasma
144. Which bird is a symbol of peace? – Dove
145. Which part of the body controls reflex actions? – Spinal cord
Practice questions 146-185
146. Which part of the human body produces insulin? – Pancreas
147. Which vitamin helps in calcium absorption? – Vitamin D
148. Which blood group is a universal donor? – O Negative
149. Which is the strongest muscle in the human body (by weight)? – Masseter (jaw muscle)
150. Which part of the brain is responsible for memory? – Hippocampus
151. Which organ purifies blood in the human body? – Kidney
152. Which part of the body contains the smallest bone? – Ear (Stapes bone)
153. Which animal has the largest brain? – Sperm Whale
154. Which is the fastest land animal? – Cheetah
155. Which bird lays the largest eggs? – Ostrich
156. Which vitamin prevents night blindness? – Vitamin A
157. Which organ in plants carries out photosynthesis? – Leaves
158. Which is the longest bone in the human body? – Femur
159. Which part of the human eye controls the amount of light entering? – Iris
160. Which hormone regulates blood sugar? – Insulin
161. Which is the only mammal capable of true flight? – Bat
162. Which is the largest gland in the human body? – Liver
163. Which pigment is found in red blood cells? – Hemoglobin
164. Which vitamin is produced in the skin with sunlight? – Vitamin D
165. Which human organ can regenerate itself? – Liver
166. Which plant is called “the king of fruits”? – Mango
167. Which insect is called the “queen of sting”? – Honeybee
168. Which disease is caused by a deficiency of Vitamin B1? – Beriberi
169. Which plant is known as the “ship of the desert”? – Cactus
170. Which animal is the largest mammal? – Blue Whale
171. Which organ is affected by hepatitis? – Liver
172. Which insect carries malaria? – Female Anopheles mosquito
173. Which blood cells help in blood clotting? – Platelets
174. Which plant gives us cotton? – Cotton plant
175. Which food is rich in protein? – Eggs
176. Which animal produces silk? – Silkworm
177. Which disease is also known as “lockjaw”? – Tetanus
178. Which gas is essential for respiration in humans? – Oxygen
179. Which vitamin deficiency causes rickets? – Vitamin D
180. Which part of the plant absorbs water? – Roots
181. Which blood vessels carry blood away from the heart? – Arteries
182. Which blood vessels carry blood to the heart? – Veins
183. Which animal is known as the ship of the desert? – Camel
184. Which is the fastes
t bird in the world? – Peregrine Falcon
185. Which organ is transplanted in a corneal transplant? – Eye cornea
Important questions and their answers related to natural science.
Earth Science & Astronomy
Chemistry
Physics
Biology..........👇