Introduction:
In today’s world, Science and Technology play a pivotal role in shaping society, economy, and human development. As part of various competitive examinations like UPSC, SSC, NDA, Railways, and State PSC, a strong foundation in General Knowledge (GK) related to Science and Technology is essential. This article presents over 200 carefully curated Multiple Choice Questions (MCQs) on Science and Technology with accurate answers and one-liner explanations. Whether you’re preparing for government exams or just enhancing your knowledge, this resource will serve as a valuable tool.
All the information has been sourced from authentic websites such as NASA, Britannica, NCERT textbooks, and official government education portals.
Science and Technology MCQs – Part 1 (1–100)
1. Q: What is the SI unit of electric current?
A: Ampere
✅ Explanation: The ampere (A) is the SI unit of electric current.
2. Q: Which planet is known as the Red Planet?
A: Mars
✅ Explanation: Mars appears red due to iron oxide on its surface.
3. Q: Who discovered the neutron?
A: James Chadwick
✅ Explanation: He discovered the neutron in 1932 through experiments involving beryllium radiation.
4. Q: What is the chemical symbol for gold?
A: Au
✅ Explanation: From Latin Aurum, meaning gold.
5. Q: Which gas do plants absorb during photosynthesis?
A: Carbon dioxide
✅ Explanation: CO₂ is absorbed by plants to produce glucose and oxygen.
6. Q: What is the full form of DNA?
A: Deoxyribonucleic Acid
✅ Explanation: DNA carries genetic instructions for living organisms.
7. Q: What is the hardest natural substance on Earth?
A: Diamond
✅ Explanation: Made entirely of carbon atoms arranged in a crystal lattice.
8. Q: Who is considered the father of modern computer science?
A: Alan Turing
✅ Explanation: He laid the foundation for theoretical computer science and artificial intelligence.
9. Q: Which acid is found in vinegar?
A: Acetic acid
✅ Explanation: Vinegar is a dilute solution of acetic acid.
10. Q: What is the study of fossils called?
A: Paleontology
✅ Explanation: It helps understand life forms that existed millions of years ago.
11. Q: Which part of the eye controls the size of the pupil?
A: Iris
✅ Explanation: The iris adjusts the pupil size based on light intensity.
12. Q: Which gas is most abundant in Earth’s atmosphere?
A: Nitrogen
✅ Explanation: About 78% of the atmosphere is nitrogen.
13. Q: What is the boiling point of water at standard atmospheric pressure?
A: 100°C
✅ Explanation: At sea level, water boils at 100 degrees Celsius.
14. Q: Which element is represented by the symbol ‘Fe’?
A: Iron
✅ Explanation: Fe comes from the Latin word Ferrum.
15. Q: What does CPU stand for in computers?
A: Central Processing Unit
✅ Explanation: It is the brain of the computer where most calculations occur.
16. Q: Which vitamin is synthesized by the body when exposed to sunlight?
A: Vitamin D
✅ Explanation: UV rays help skin synthesize Vitamin D from cholesterol.
17. Q: What is the function of hemoglobin in blood?
A: Transport oxygen
✅ Explanation: Hemoglobin binds to oxygen in the lungs and releases it in tissues.
18. Q: Which instrument measures atmospheric pressure?
A: Barometer
✅ Explanation: Used in weather forecasting and altitude measurement.
19. Q: Which type of mirror is used in vehicle headlights?
A: Concave mirror
✅ Explanation: It focuses light into a strong beam.
20. Q: What is the main component of biogas?
A: Methane
✅ Explanation: Biogas is produced from organic waste and contains methane as a major constituent.
21. Q: Which law states that every action has an equal and opposite reaction?
A: Newton’s Third Law
✅ Explanation: Fundamental principle of motion.
22. Q: Which part of the plant conducts photosynthesis?
A: Leaf
✅ Explanation: Chlorophyll in leaves captures sunlight for photosynthesis.
23. Q: What is the atomic number of oxygen?
A: 8
✅ Explanation: Oxygen has 8 protons in its nucleus.
24. Q: Which scientist proposed the theory of relativity?
A: Albert Einstein
✅ Explanation: His theory revolutionized understanding of space, time, and gravity.
25. Q: What is the term for animals that give birth to live young ones?
A: Viviparous
✅ Explanation: Opposite of oviparous, which lays eggs.
26. Q: Which metal is liquid at room temperature?
A: Mercury
✅ Explanation: Mercury remains liquid at temperatures above -38.83°C.
27. Q: Which planet has the Great Red Spot?
A: Jupiter
✅ Explanation: A giant storm on Jupiter observed for centuries.
28. Q: What is the SI unit of force?
A: Newton
✅ Explanation: Named after Sir Isaac Newton.
29. Q: Which organ filters blood in the human body?
A: Kidney
✅ Explanation: Removes waste and excess substances from blood.
30. Q: What is the process of separation of cream from milk called?
A: Centrifugation
✅ Explanation: Uses centrifugal force to separate heavier particles.
31. Q: Which part of the brain controls voluntary actions?
A: Cerebrum
✅ Explanation: Largest part of the brain responsible for thinking and movement.
32. Q: What is the full form of HTTPS?
A: Hypertext Transfer Protocol Secure
✅ Explanation: Secures data transfer between browsers and servers.
33. Q: Which acid is present in lemon?
A: Citric acid
✅ Explanation: Gives citrus fruits their sour taste.
34. Q: What is the smallest bone in the human body?
A: Stapes
✅ Explanation: Found in the middle ear.
35. Q: Which country launched the first artificial satellite?
A: Soviet Union
✅ Explanation: Sputnik 1 was launched in 1957.
36. Q: What is the function of white blood cells?
A: Fight infections
✅ Explanation: Part of the immune system protecting against pathogens.
37. Q: What is the chemical formula of water?
A: H₂O
✅ Explanation: Two hydrogen atoms and one oxygen atom.
38. Q: Which lens is used to correct myopia?
A: Concave lens
✅ Explanation: Helps focus light correctly on the retina.
39. Q: What is the unit of frequency?
A: Hertz
✅ Explanation: Measures cycles per second.
40. Q: Which enzyme is involved in digestion of proteins?
A: Pepsin
✅ Explanation: Secreted by the stomach to break down proteins.
41. Q: What is the full form of RAM?
A: Random Access Memory
✅ Explanation: Temporary memory used by the computer while running programs.
42. Q: Which part of the plant absorbs water and minerals from soil?
A: Roots
✅ Explanation: Root hairs increase absorption surface area.
43. Q: Which element is a good conductor of electricity?
A: Copper
✅ Explanation: Widely used in electrical wiring.
44. Q: Which disease is caused by deficiency of Vitamin C?
A: Scurvy
✅ Explanation: Leads to bleeding gums and joint pain.
45. Q: What is the speed of light in vacuum?
A: 3 × 10⁸ m/s
✅ Explanation: Fastest known speed in the universe.
46. Q: Which planet is known as Earth’s twin?
A: Venus
✅ Explanation: Similar in size and mass to Earth.
47. Q: What is the function of the ozone layer?
A: Absorbs harmful UV rays
✅ Explanation: Protects life from ultraviolet radiation.
48. Q: Which part of the cell is called the powerhouse?
A: Mitochondria
✅ Explanation: Produces ATP, the energy currency of the cell.
49. Q: What is the full form of AI?
A: Artificial Intelligence
✅ Explanation: Simulates human intelligence in machines.
50. Q: Which gas is filled in electric bulbs?
A: Argon
✅ Explanation: Inert gas prevents filament oxidation.
51. Q: What is the SI unit of work?
A: Joule
✅ Explanation: Equal to one newton-meter.
52. Q: Which vitamin is essential for blood clotting?
A: Vitamin K
✅ Explanation: Required for synthesis of clotting factors.
53. Q: Which animal is known as the ship of the desert?
A: Camel
✅ Explanation: Adapted to survive long periods without water.
54. Q: Which instrument is used to measure humidity?
A: Hygrometer
✅ Explanation: Measures moisture content in air.
55. Q: What is the color of copper sulfate crystals?
A: Blue
✅ Explanation: Due to presence of water of crystallization.
56. Q: Which element has the highest melting point?
A: Tungsten
✅ Explanation: Melts at around 3422°C.
57. Q: What is the pH value of pure water?
A: 7
✅ Explanation: Neutral on the pH scale.
58. Q: Which part of the brain regulates body temperature?
A: Hypothalamus
✅ Explanation: Maintains homeostasis including temperature control.
59. Q: What is the full form of URL?
A: Uniform Resource Locator
✅ Explanation: Identifies web addresses on the internet.
60. Q: Which organelle contains chlorophyll?
A: Chloroplast
✅ Explanation: Site of photosynthesis in plant cells.
61. Q: What is the freezing point of water?
A: 0°C
✅ Explanation: At standard atmospheric pressure.
62. Q: Which hormone regulates blood sugar levels?
A: Insulin
✅ Explanation: Produced by the pancreas.
63. Q: Which gas is responsible for global warming?
A: Carbon dioxide
✅ Explanation: Traps heat in the atmosphere causing greenhouse effect.
64. Q: What is the full form of LASER?
A: Light Amplification by Stimulated Emission of Radiation
✅ Explanation: Emits coherent and focused light beams.
65. Q: Which part of the plant helps in respiration?
A: Stomata
✅ Explanation: Tiny pores on leaves for gaseous exchange.
66. Q: Which scientist is known for the laws of motion?
A: Isaac Newton
✅ Explanation: Formulated three fundamental laws of classical mechanics.
67. Q: Which disease is caused by Plasmodium parasite?
A: Malaria
✅ Explanation: Transmitted through mosquito bites.
68. Q: Which acid is present in ant stings?
A: Formic acid
✅ Explanation: Causes irritation and pain.
69. Q: Which planet has rings around it?
A: Saturn
✅ Explanation: Most prominent ring system among planets.
70. Q: What is the full form of WWW?
A: World Wide Web
✅ Explanation: Information system accessed via the internet.
71. Q: Which part of the brain controls heartbeat and breathing?
A: Medulla oblongata
✅ Explanation: Located in the hindbrain.
72. Q: What is the chemical name of baking soda?
A: Sodium bicarbonate
✅ Explanation: Used in cooking and fire extinguishers.
73. Q: Which gas is evolved when metal reacts with acid?
A: Hydrogen
✅ Explanation: Metal displaces hydrogen from acids.
74. Q: What is the SI unit of power?
A: Watt
✅ Explanation: One joule per second.
75. Q: Which organism is used in making bread?
A: Yeast
✅ Explanation: Ferments sugars to produce carbon dioxide.
76. Q: What is the main source of solar energy?
A: Nuclear fusion
✅ Explanation: Sun produces energy by fusing hydrogen into helium.
77. Q: Which part of the plant grows towards gravity?
A: Root
✅ Explanation: Exhibits positive geotropism.
78. Q: Which vitamin is essential for vision?
A: Vitamin A
✅ Explanation: Required for formation of visual pigments.
79. Q: Which gas is used in refrigerators?
A: Freon
✅ Explanation: Commonly used refrigerant in older models.
80. Q: What is the function of antibodies in the body?
A: Fight antigens
✅ Explanation: Proteins produced by immune system to neutralize pathogens.
81. Q: What is the full form of GPS?
A: Global Positioning System
✅ Explanation: Provides location and time information anywhere on Earth.
82. Q: Which part of the flower develops into fruit?
A: Ovary
✅ Explanation: After fertilization, ovary matures into fruit.
83. Q: Which gas is released during respiration?
A: Carbon dioxide
✅ Explanation: Byproduct of cellular respiration.
84. Q: What is the unit of resistance?
A: Ohm
✅ Explanation: Measured using an ohmmeter.
85. Q: Which enzyme breaks down starch into sugar?
A: Amylase
✅ Explanation: Present in saliva and pancreas.
86. Q: Which scientist discovered penicillin?
A: Alexander Fleming
✅ Explanation: Revolutionized treatment of bacterial infections.
87. Q: What is the full form of PDF?
A: Portable Document Format
✅ Explanation: Preserves document formatting across platforms.
88. Q: Which planet rotates clockwise?
A: Venus
✅ Explanation: Unique rotation direction compared to other planets.
89. Q: Which disease is caused by deficiency of iodine?
A: Goitre
✅ Explanation: Enlargement of thyroid gland.
90. Q: What is the full form of USB?
A: Universal Serial Bus
✅ Explanation: Standard interface for connecting peripherals.
91. Q: Which part of the eye gives it color?
A: Iris
✅ Explanation: Pigmentation determines eye color.
92. Q: Which acid is present in gastric juice?
A: Hydrochloric acid
✅ Explanation: Helps digest food in the stomach.
93. Q: Which bird can fly backward?
A: Hummingbird
✅ Explanation: Only bird capable of sustained hovering and backward flight.
94. Q: Which element is used in pencils?
A: Graphite
✅ Explanation: Soft allotrope of carbon used in writing instruments.
95. Q: What is the function of the liver?
A: Detoxifies chemicals
✅ Explanation: Also produces bile and stores glycogen.
96. Q: Which scientist is associated with the invention of the telephone?
A: Alexander Graham Bell
✅ Explanation: Patented the first practical telephone in 1876.
97. Q: Which part of the plant carries water and minerals upward?
A: Xylem
✅ Explanation: Conducts water from roots to leaves.
98. Q: Which vitamin is known as niacin?
A: Vitamin B3
✅ Explanation: Important for metabolism and skin health.
99. Q: What is the full form of HTML?
A: HyperText Markup Language
✅ Explanation: Standard language for creating web pages.
100. Q: Which part of the brain controls balance and posture?
A: Cerebellum
✅ Explanation: Located below the cerebrum.
Science and Technology MCQs – Part 2 (101–200)
101. Q: Which gas is responsible for acid rain?
A: Sulfur dioxide
✅ Explanation: Reacts with water vapor to form sulfuric acid.
102. Q: Which instrument is used to measure earthquake intensity?
A: Seismograph
✅ Explanation: Records ground movements caused by earthquakes.
103. Q: What is the main cause of rusting of iron?
A: Oxidation
✅ Explanation: Reaction with oxygen and moisture.
104. Q: Which planet is closest to the Sun?
A: Mercury
✅ Explanation: Smallest and fastest planet.
105. Q: Which part of the cell contains hereditary material?
A: Nucleus
✅ Explanation: Controls all cellular activities.
106. Q: Which scientist proposed the theory of evolution?
A: Charles Darwin
✅ Explanation: Published “On the Origin of Species” in 1859.
107. Q: Which device converts mechanical energy into electrical energy?
A: Dynamo
✅ Explanation: Works on the principle of electromagnetic induction.
108. Q: Which acid is found in tamarind?
A: Tartaric acid
✅ Explanation: Used in food preparation and cleaning agents.
109. Q: Which part of the plant helps in seed dispersal?
A: Fruit
✅ Explanation: Fruits protect seeds and aid in their spread.
110. Q: What is the function of red blood cells?
A: Carry oxygen
✅ Explanation: Contain hemoglobin to transport oxygen.
111. Q: Which organization governs space research in India?
A: ISRO
✅ Explanation: Indian Space Research Organisation.
112. Q: Which vitamin is required for healthy bones?
A: Vitamin D
✅ Explanation: Enhances calcium absorption.
113. Q: Which part of the brain is responsible for speech?
A: Cerebrum
✅ Explanation: Broca’s and Wernicke’s areas are involved.
114. Q: What is the SI unit of magnetic field strength?
A: Tesla
✅ Explanation: Named after Nikola Tesla.
115. Q: Which element is the most electronegative?
A: Fluorine
✅ Explanation: Has the strongest tendency to attract electrons.
116. Q: Which disease is caused by virus?
A: Influenza
✅ Explanation: Caused by influenza viruses.
117. Q: Which part of the plant is modified into tendrils in pea plants?
A: Leaves
✅ Explanation: Help in climbing support.
118. Q: What is the function of insulin hormone?
A: Regulates blood sugar
✅ Explanation: Facilitates glucose uptake by cells.
119. Q: Which gas is used in balloons?
A: Helium
✅ Explanation: Lighter than air and non-reactive.
120. Q: Which scientist discovered radioactivity?
A: Henri Becquerel
✅ Explanation: Accidentally discovered uranium salts emit radiation.
121. Q: Which part of the body produces insulin?
A: Pancreas
✅ Explanation: Contains beta cells that secrete insulin.
122. Q: What is the full form of Wi-Fi?
A: Wireless Fidelity
✅ Explanation: Allows devices to connect to internet wirelessly.
123. Q: Which part of the plant helps in vegetative propagation?
A: Stem
✅ Explanation: Examples include potato tubers and sugarcane cuttings.
124. Q: Which planet has the largest moon in the solar system?
A: Jupiter
✅ Explanation: Ganymede is Jupiter’s largest moon.
125. Q: What is the chemical formula of sodium chloride?
A: NaCl
✅ Explanation: Common salt.
126. Q: Which disease is caused by deficiency of Vitamin B1?
A: Beriberi
✅ Explanation: Affects nervous system and heart.
127. Q: Which part of the brain is involved in learning and memory?
A: Hippocampus
✅ Explanation: Crucial for forming new memories.
128. Q: What is the full form of HTTP?
A: Hypertext Transfer Protocol
✅ Explanation: Foundation of data communication on the web.
129. Q: Which acid is present in spinach?
A: Oxalic acid
✅ Explanation: Can interfere with calcium absorption.
130. Q: Which part of the body removes urea from blood?
A: Kidneys
✅ Explanation: Urea is excreted in urine.
131. Q: What is the SI unit of capacitance?
A: Farad
✅ Explanation: Named after Michael Faraday.
132. Q: Which scientist discovered the electron?
A: J.J. Thomson
✅ Explanation: Through cathode ray tube experiments.
133. Q: Which part of the plant helps in transpiration?
A: Stomata
✅ Explanation: Water evaporates through stomatal openings.
134. Q: Which vitamin is also known as cobalamin?
A: Vitamin B12
✅ Explanation: Essential for nerve function and red blood cell production.
135. Q: Which part of the brain controls hunger and thirst?
A: Hypothalamus
✅ Explanation: Regulates basic survival functions.
136. Q: What is the function of adrenaline hormone?
A: Prepares body for fight or flight
✅ Explanation: Released during stress or danger.
137. Q: Which gas is used in welding?
A: Acetylene
✅ Explanation: Burns with oxygen to produce high-temperature flame.
138. Q: Which part of the plant shows phototropism?
A: Shoot
✅ Explanation: Grows towards light.
139. Q: What is the full form of LCD?
A: Liquid Crystal Display
✅ Explanation: Common display technology for screens.
140. Q: Which scientist is known for the discovery of radio waves?
A: Heinrich Hertz
✅ Explanation: Confirmed existence of electromagnetic waves.
141. Q: Which disease is caused by deficiency of Vitamin D?
A: Rickets
✅ Explanation: Bone-softening condition in children.
142. Q: Which part of the flower protects it in the bud stage?
A: Sepals
✅ Explanation: Outermost whorl of the flower.
143. Q: Which element is used in nuclear reactors as fuel?
A: Uranium
✅ Explanation: U-235 undergoes fission to release energy.
144. Q: What is the full form of OLED?
A: Organic Light Emitting Diodes
✅ Explanation: Used in advanced display technologies.
145. Q: Which part of the body produces growth hormone?
A: Pituitary gland
✅ Explanation: Known as the “master gland” of the endocrine system.
146. Q: Which gas is responsible for the depletion of the ozone layer?
A: Chlorofluorocarbons (CFCs)
✅ Explanation: Released from aerosols and refrigerants.
147. Q: Which part of the brain is responsible for coordination of muscular activity?
A: Cerebellum
✅ Explanation: Ensures smooth and precise movements.
148. Q: What is the full form of DVD?
A: Digital Versatile Disc
✅ Explanation: Optical storage medium for data and media.
149. Q: Which part of the plant performs respiration?
A: All living cells
✅ Explanation: Every cell requires energy for functioning.
150. Q: Which scientist invented the lightning rod?
A: Benjamin Franklin
✅ Explanation: Demonstrated lightning is electrical and designed protection.
151. Q: Which part of the eye contains the visual receptors?
A: Retina
✅ Explanation: Contains rods and cones for vision.
152. Q: Which vitamin is required for blood coagulation?
A: Vitamin K
✅ Explanation: Essential for synthesizing clotting proteins.
153. Q: Which part of the plant helps in asexual reproduction?
A: Vegetative parts
✅ Explanation: Includes stems, roots, and leaves.
154. Q: What is the SI unit of inductance?
A: Henry
✅ Explanation: Named after Joseph Henry.
155. Q: Which part of the brain is affected in Parkinson’s disease?
A: Substantia nigra
✅ Explanation: Degeneration leads to dopamine deficiency.
156. Q: Which gas is used in neon signs?
A: Neon
✅ Explanation: Emits bright red-orange light when electrified.
157. Q: Which part of the body produces testosterone?
A: Testes
✅ Explanation: Primary male sex hormones.
158. Q: Which part of the plant is used in grafting?
A: Stem
✅ Explanation: Scion and stock are joined together.
159. Q: Which scientist is known for the discovery of X-rays?
A: Wilhelm Roentgen
✅ Explanation: Awarded Nobel Prize for this discovery.
160. Q: Which part of the brain is responsible for hearing?
A: Temporal lobe
✅ Explanation: Contains auditory cortex.
161. Q: Which part of the body produces estrogen?
A: Ovaries
✅ Explanation: Primary female sex hormone.
162. Q: What is the function of platelets in blood?
A: Clot formation
✅ Explanation: Prevent excessive bleeding.
163. Q: Which part of the plant helps in anchoring?
A: Roots
✅ Explanation: Anchor the plant and absorb nutrients.
164. Q: Which part of the brain is responsible for facial recognition?
A: Fusiform gyrus
✅ Explanation: Specialized area for identifying faces.
165. Q: Which part of the body produces thyroxine?
A: Thyroid gland
✅ Explanation: Regulates metabolism.
166. Q: Which part of the plant is modified into spines in cactus?
A: Leaves
✅ Explanation: Reduce water loss and provide defense.
167. Q: Which part of the brain is affected in Alzheimer’s disease?
A: Hippocampus
✅ Explanation: Memory-related region degenerates.
168. Q: Which part of the body produces glucagon?
A: Pancreas
✅ Explanation: Increases blood sugar levels.
169. Q: Which part of the plant helps in seed germination?
A: Embryo
✅ Explanation: Develops into new plant under favorable conditions.
170. Q: Which part of the body produces adrenaline?
A: Adrenal glands
✅ Explanation: Situated above the kidneys.
171. Q: Which part of the brain is responsible for emotions?
A: Limbic system
✅ Explanation: Includes amygdala and hippocampus.
172. Q: Which part of the plant helps in nutrient storage?
A: Roots
✅ Explanation: Some roots like carrots store food.
173. Q: Which part of the brain controls involuntary actions?
A: Medulla oblongata
✅ Explanation: Manages heart rate, breathing, etc.
174. Q: Which part of the body produces cortisol?
A: Adrenal glands
✅ Explanation: Stress hormone involved in fight-or-flight response.
175. Q: Which part of the plant is modified into traps in insectivorous plants?
A: Leaves
✅ Explanation: Capture insects for nutrition.
176. Q: Which part of the brain is responsible for reasoning?
A: Frontal lobe
✅ Explanation: Involved in decision-making and problem-solving.
177. Q: Which part of the body produces progesterone?
A: Ovaries
✅ Explanation: Maintains pregnancy and menstrual cycle.
178. Q: Which part of the plant helps in pollination?
A: Flower
✅ Explanation: Attracts pollinators with colors and scent.
179. Q: Which part of the brain is responsible for speech production?
A: Broca’s area
✅ Explanation: Located in frontal lobe.
180. Q: Which part of the body produces melatonin?
A: Pineal gland
✅ Explanation: Regulates sleep-wake cycle.
181. Q: Which part of the plant helps in asexual reproduction in yeast?
A: Budding
✅ Explanation: New individuals grow as outgrowths.
182. Q: Which part of the brain interprets sensory signals?
A: Thalamus
✅ Explanation: Relay station for sensory information.
183. Q: Which part of the body produces prolactin?
A: Pituitary gland
✅ Explanation: Stimulates milk production in mammary glands.
184. Q: Which part of the plant helps in sexual reproduction?
A: Flower
✅ Explanation: Contains reproductive structures.
185. Q: Which part of the brain is responsible for processing sound?
A: Temporal lobe
✅ Explanation: Contains auditory cortex.
186. Q: Which part of the body produces oxytocin?
A: Pituitary gland
✅ Explanation: Stimulates labor contractions and lactation.
187. Q: Which part of the plant helps in vegetative propagation in Bryophyllum?
A: Leaf
✅ Explanation: Notches on leaf margins develop into new plants.
188. Q: Which part of the brain is responsible for recognizing touch?
A: Parietal lobe
✅ Explanation: Processes tactile sensations.
189. Q: Which part of the body produces calcitonin?
A: Thyroid gland
✅ Explanation: Regulates calcium levels in blood.
190. Q: Which part of the plant helps in reproduction in Spirogyra?
A: Conjugation
✅ Explanation: Sexual mode of reproduction.
191. Q: Which part of the brain is responsible for planning and judgment?
A: Prefrontal cortex
✅ Explanation: Higher-order cognitive functions.
192. Q: Which part of the body produces aldosterone?
A: Adrenal glands
✅ Explanation: Regulates sodium and potassium balance.
193. Q: Which part of the plant helps in reproduction in Hydra?
A: Budding
✅ Explanation: Asexual reproduction method.
194. Q: Which part of the brain is responsible for recognizing smell?
A: Olfactory bulb
✅ Explanation: Processes olfactory signals.
195. Q: Which part of the body produces gastrin?
A: Stomach
✅ Explanation: Stimulates secretion of gastric juice.
196. Q: Which part of the plant helps in reproduction in yeast?
A: Budding
✅ Explanation: Reproduction through small outgrowths.
197. Q: Which part of the brain is responsible for recognizing taste?
A: Gustatory cortex
✅ Explanation: Processes taste signals.
198. Q: Which part of the body produces secretin?
A: Small intestine
✅ Explanation: Stimulates pancreatic juice secretion.
199. Q: Which part of the plant helps in reproduction in Rhizopus?
A: Spores
✅ Explanation: Asexual reproduction through sporangia.
200. Q: Which part of the brain is responsible for recognizing sight?
A: Occipital lobe
✅ Explanation: Contains visual cortex.
Conclusion:
This comprehensive list of Science and Technology MCQs covers a wide range of topics from physics, chemistry, biology, computer science, and space science. These questions are designed to enhance your General Knowledge (GK) and assist in competitive exam preparation such as UPSC, SSC, Railways, NDA, and state-level PSC exams.
Make sure to practice these regularly, understand the concepts behind each question, and revise often for better retention. Stay updated with the latest developments in science and technology for holistic learning.
Disclaimer:
The information provided in this article is compiled from various reliable sources including academic publications, government websites, and educational portals. While we strive to ensure accuracy, no responsibility is accepted for any errors or omissions. Readers are encouraged to cross-check facts before relying on them for examinations or professional purposes.
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