General Science 🌈 सामान्य विज्ञान 🌈
1. What is the pH value of human blood?
👉 7.35 – 7.45
2. Where is hydrochloric acid found in the human body?
👉 Stomach
3. Which metals form amalgam with mercury?
👉 Gold, Silver etc.
4. Which element does not burn in water?
👉 Sodium
5. Who discovered hydrogen?
👉 Henry Cavendish
6. What is the chemical name of Vitamin C?
👉 Ascorbic Acid
7. How many oxygen atoms are there in ozone?
👉 3
8. Which element is related to anemia in the human body?
👉 Iron
9. Litmus is obtained from which source?
👉 Lichen
10. Which acid is found in ants?
👉 Formic Acid
11. Which substance is used in blue washing of clothes?
👉 Ultramarine Blue
12. What is the method of refining aluminum?
👉 Hall-Héroult Process
13. Which gas is filled in balloons?
👉 Helium
14. What is the chemical name of limestone?
👉 Calcium Carbonate
15. How are gases separated from petroleum?
👉 Fractional Distillation
16. Which acid is found in mango?
👉 Tartaric Acid
17. What is the chemical formula of glucose?
👉 C₆H₁₂O₆
18. What are substances called that don't dissolve in water?
👉 Insoluble
19. What is the main component of gunpowder?
👉 Potassium Nitrate
20. Which helps in digestion of food?
👉 Enzyme
21. What are enzymes composed of?
👉 Amino acid
22. What is the largest gland in human body?
👉 Liver
23. Why does the sun appear red at sunrise and sunset?
👉 Dispersion of light
24. Who secretes bile?
👉 Liver
25. What is Rusting of iron?
👉 Chemical reaction
26. Which part of human body has the highest number of bones?
👉 Finger
27. Who is the father of Biology and Zoology?
👉 Aristotle
28. Who first used the term Biology?
👉 Lamarck & Treviranus
29. Who is the father of Medicine?
👉 Hippocrates
30. Who is the father of Botany?
👉 Theophrastus
31. Who is the father of Chemistry?
👉 Lavoisier
32. Study of human evolution, history, culture is called?
👉 Anthropology
33. Who proposed laws of gas diffusion?
👉 Graham
34. Who proposed the laws of planetary motion?
👉 Kepler
35. Who gave the equation E = mc²?
👉 Einstein
36. Who discovered laws of inertia?
👉 Galileo
37. Who gave the law of gravitation?
👉 Newton
38. Who proposed Natural Selection?
👉 Darwin
39. Who gave Mutation Theory?
👉 Hugo de Vries
40. Who is the proponent of Theory of Evolution?
👉 Charles Darwin
41. Who is the father of Genetics?
👉 Gregor John Mendel
42. Who discovered bacteria?
👉 Leeuwenhoek
43. In which medium is the speed of sound highest?
👉 Solids
44. In which medium is the speed of sound lowest?
👉 Air
45. What is the speed of sound?
👉 760 miles/hour
46. What happens to sound speed with temperature rise?
👉 Increases
47. What is air?
👉 Mixture of gases
48. Speed of sound in air?
👉 332 m/s
49. Unit of sound intensity?
👉 Decibel
50. What is the specific gravity of air?
👉 14.4
51. One light year equals?
👉 9.46×10¹² km or 9.46×10¹⁵ m
52. What is the pH of bile?
👉 7.7
53. Which vitamin is stored in liver?
👉 Vitamin A
54. Where is bile stored?
👉 Gall bladder
55. How is hydrophobia (rabies) spread?
👉 Dog bite
56. What causes hydrophobia?
👉 By virus
57. Who discovered virus?
👉 Ivanovsky
58. Study of viruses is called?
👉 Virology
59. Rabies disease spreads through?
👉 Virus
60. Cause of Foot and Mouth disease in animals?
👉 Due to virus
61. Study of fungi is called?
👉 Mycology
62. Study of algae is called?
👉 Phycology
63. Algal cell wall is made of?
👉 Cellulose
64. Blood vessel that carries blood to the heart?
👉 Vein
65. Vessel carrying blood from heart to body?
👉 Artery
66. What controls heartbeat?
👉 Pacemaker
67. What is Jarvik-7?
👉 Artificial Heart
68. What transports oxygen in the body?
👉 Blood
69. What is bile?
👉 Yellow-green alkaline fluid
70. RH factor is related to?
👉 Blood
71. Who discovered the RH factor?
👉 Landsteiner & Wiener
72. Blood pressure is controlled by?
👉 Adrenal gland
73. What purifies blood?
👉 Kidney
74. What is the process of blood purification called?
👉 Dialysis
75. Where is urine formed?
👉 Kidneys
76. What is the weight of the kidney?
👉 150 gm
77. Kidney stones are composed of?
👉 Calcium Oxalate
78. Instrument for measuring blood pressure?
👉 Sphygmomanometer
79. Who studied the blood circulation system?
👉 William Harvey
80. Artificial kidney works on which principle?
👉 Dialysis
81. Eye color depends on which part?
👉 Iris
82. Which part turns pink when dust enters the eye?
👉 Conjunctiva
83. Which plant has the largest flower?
👉 Rafflesia
84. What is a natural polymer?
👉 Rubber
85. What is used to artificially ripen raw fruits?
👉 Acetylene gas
85. What is most suitable for making an electromagnet?
👉 Soft iron
86. What is the nature of CO₂ gas?
👉 Acidic
87. What is considered the best reflector of light?
👉 Plane mirror
88. Which phenomena form a rainbow?
👉 Total internal reflection, refraction & dispersion
89. Scattering of light depends on?
👉 Wavelength
90. Which has the shortest wavelength?
👉 Gamma rays
91. What causes myopia (short-sightedness)?
👉 Thick lens & reduced focal length
92. Effect of temperature on semiconductors?
👉 Conductivity increases with temperature
93. Heater wire is made of?
👉 Nichrome
94. How many times heavier is a proton than an electron?
👉 1836 times
95. What is Penicillin?
👉 Antibiotic
96. How many chambers are there in the human heart?
👉 Four
97. Which vitamin is absent in eggs?
👉 Vitamin C
98. Protein is digested by which enzyme?
👉 Pepsin
99. Which part of the egg contains more protein?
👉 Egg white
100. Which form of iron has the least carbon content?
👉 Wrought iron
101. What is water glass chemically?
👉 Sodium silicate
102. What are pain-relieving medicines called?
👉 Analgesic
103. Proteins are made of what?
👉 Amino acids
104. Which sugar is found in milk?
👉 Lactose
105. What do antibiotics destroy?
👉 Bacteria
106. Where is iron found in highest amount?
👉 Green vegetables
107. Ranikhet disease is related to?
👉 Poultry
108. Alzheimer's disease affects which organ of the body?
👉 Brain
109. What are the primary colours?
👉 Red, Green and Blue
110. Which part of brain detects smell?
👉 Cerebrum
111. Who proposed the 'Black Hole' theory?
👉 S. Chandrasekhar
112. What happens to the density of milk after removing cream?
👉 Density increases
113. What happens to the weight of iron when it rusts?
👉 Weight increases
114. Who is called the father of medicine?
👉 Hippocrates
115. How much percentage of human body is water?
👉 65–80%
116. In which disease blood does not clot?
👉 Hemophilia
117. What is most deficient in malnutrition?
👉 Protein
118. In which organ is urea formed in the body?
👉 Liver
119. Aging in humans is caused by the disappearance of which gland?
👉 Thymus
120. Blood pressure is controlled by which gland?
👉 Adrenal gland
121. Which temperature is milk pasteurized?
👉 62°C
122. Sourness in milk is caused by?
👉 Bacteria
123. Which soil is best for cotton cultivation?
👉 Black soil (Regur soil)
124. Child's gender is determined by?
👉 Father's chromosom
125. Life-saving hormones are secreted by which gland?
👉 Adrenal
126. Sudden fall of mercury level in barometer indicates?
👉 Storm, Cyclone
127. Who determined the pH scale?
👉 Sorensen
128. What is the largest muscle in the human body?
👉 Gluteus Maximus
129. Which vitamin helps heal wounds quickly?
👉 Vitamin C
130. What is coated on photography plates?
👉 Silver Bromide
131. Which microorganism causes cholera?
👉 Vibrio Cholerae
132. What is the largest artery in the human body?
👉 Aorta
133. Which method is used to estimate Earth's age?
👉 Uranium Dating Method
134. Who discovered insulin?
👉 Banting & Best
135. Parsec is the unit of which physical quantity?
👉 Astronomical distance
136. What causes yellow color in cow's milk?
👉 Carotene
137. What is the parasite of malaria?
👉 Plasmodium
138. Which gas is used for welding metals?
👉 Acetylene gas
139. Polythene is a polymer of which compound?
👉 Ethylene
140. What is done to protect iron from rusting?
👉 Galvanization
141. Which is the most reactive halogen?
👉 Fluorine
142. Galena is the ore of which metal?
👉 Lead
143. What is the rate of change of velocity called?
👉 Acceleration
144. What is the transfer of heat through conduction called?
👉 Thermal Conduction
145. What is the inner surface of the eye called?
👉 Retina
146. What is the composition of air?
👉 Nitrogen 78% and Oxygen 21%
147. How much carbon dioxide is in air?
👉 0.03%
148. Which is the closest atmospheric layer to Earth?
👉 Troposphere
149. In which layer do weather phenomena occur?
👉 Troposphere
150. In which season does the troposphere thicken?
👉 Summer
151. How much does temperature drop every 165 m in troposphere?
👉 1°C
152. What is the temperature drop per 1 km in troposphere?
👉 6.4°C
153. Which are greenhouse gases?
👉 CO₂ and CFCs
154. What is the presence of water in air called?
👉 Humidity
155. What is the percentage of water on Earth’s surface?
👉 71% (Freshwater 2.5%)
156. How is nitrogen cycled in ecosystems?
👉 Bacteria
157. What is the main source of energy in the biosphere?
👉 Solar energy
158. Which bacteria is found in legume roots?
👉 Rhizobium
159. What maintains Earth's temperature?
👉 CO₂ and Water vapour
160. Which is the outermost atmospheric layer?
👉 Exosphere
161. What is the instrument and unit for measuring atmospheric pressure?
👉 Barometer and Bar
162. What is the minimum distance for clear vision in the human eye?
👉 25 cm
163. Capsule coating is made of?
👉 Starch
164. Egg shell is made of?
👉 Calcium Carbonate
165. Which branch studies the human brain and skull?
👉 Phrenology
166. What decreases due to dehydration?
👉 Sodium Chloride
167. Where is the weight of an object maximum?
👉 At the poles
168. What is artificial silk called?
👉 Rayon
169. Which tissue transports food in plants?
👉 Phloem
170. What is the name of tear gas?
👉 Chloroacetophenone
171. What is the resistance of a superconductor?
👉 Zero
172. Who discovered DNA?
👉 Watson and Crick
173. What is the scientific name of mango?
👉 Mangifera Indica
174. Which addictive substance is found in tobacco?
👉 Nicotine
175. Which gas is used to cool water in refrigerators?
👉 Ammonia gas
176. What is the value of atmospheric pressure?
👉 10⁵ N/m²
177. How many images are formed between two parallel mirrors?
👉 Infinite
178. Pepsin converts protein into what?
👉 Polypeptide
179. Kwashiorkor and Marasmus are caused due to deficiency of?
👉 Protein
180. What are the units of DNA called?
👉 Nucleotides
181. At what temperature are Celsius and Fahrenheit equal?
👉 -40°
182. Which gas is filled in a tube light?
👉 Argon
183. What is the main cause of acid rain?
👉 Sulfur Oxide and Nitrogen Oxide
184. What does a solar cell do?
👉 Converts solar energy to electricity
185. Osteology' is the study of?
👉 Bones
186. What is the diameter of the Sun?
👉 13,92,000 Km
187. Cholera is caused by?
👉 Bacteria
188. What is the state of bromine at room temperature?
👉 Liquid
189. Heat from Sun reaches Earth through?
👉 Radiation
190. Typhoid affects which organ of the body?
👉 Intestine
191. What is the chemical name of gypsum?
👉 Calcium Sulfate
192. What is the smallest unit of the human body?
👉 Cell
193. Excess cholesterol in the body causes
👉 Heart attack
194. What is the speed of sound in air?
👉 760 miles/hour
195. What are major ores of Calcium, Potassium & Cadmium?
👉 Dolomite, Nitre & Greenockite
196. Natural gas is a mixture of?
👉 Butane & Propane
197. What is added to LPG for smell?
👉 Methyl Mercaptan
198. What is the artificial fiber made from cellulose called?
👉 Rayon
199. What is the specific gravity & refractive index of diamond?
👉 2.2 & 2.42
200. 1 mole equals to?
👉 6.023 × 10²³ molecules (Avogadro's number)
201. What is the melting & freezing point of ice?
👉 0°C
202. Which material is used for control rods in nuclear reactors?
👉 Cadmium or Boron
203. What are examples of semiconductors?
👉 Carbon, Silicon & Germanium
204. In glass, which color has highest and lowest speed?
👉 Red (highest) & Violet (lowest)
205. Air bubble in water behaves like?
👉 Concave lens
206. What is the image in plane mirror?
👉 Virtual, Same size, and Laterally inverted
207. What is the wavelength of light?
👉 3900 Å - 7800 Å
208. Speed of light in air/vacuum?
👉 3 × 10⁸ m/s
209. Heat transfer in solids takes place by?
👉 Conduction
210. Sound affects ear for how long?
👉 1/10 seconds
211. Examples of longitudinal and transverse waves?
👉 Sound wave (longitudinal) & Light wave (transverse)
212. The time period of a pendulum does not depend on?
👉 Mass
213. Kwashiorkor is caused due to deficiency of what?
👉 Protein
214. Metamorphic form of limestone?
👉 Marble
215. Where is the most cholesterol produced in the human body?
👉 Liver
216. Which is the largest angiosperm plant?
👉 Eucalyptus
217. Where is the smallest chromosome found?
👉 Algae
218. Where is the longest chromosome found?
👉 Trillium
219. Which is the smallest non-seed plant?
👉 Zoemia Pygmaea
220. Which has the highest protein content?
👉 Soyabean
221. What is found in leaf cells?
👉 Chlorophyll
222. What do plants form in sunlight with help of chlorophyll?
👉 Carbohydrates
223. What is the study of flowers called?
👉 Anthology
224.What is the reproductive organ of a flower?
👉 Flower
225. Why do plants glow at night?
👉 Phosphorescence
226. What transports food in plants?
👉 Phloem
227. Which metal is present in chlorophyll?
👉 Magnesium (Mg)
228. Where is yeast used?
👉 Baking and Beverages
229. What transports minerals from roots to leaves in plants?
👉 Phloem
230. Which gas causes greenhouse effect?
👉 CO₂
231. What does CFC affect?
👉 Ozone layer
232. What is the study of fruits called?
👉 Pomology
233. What is the study of plants called?
👉 Xerophytes
234. Which gas do plants take in and release during the day?
👉 Take CO₂, Release Oxygen
235. What is the unit of Luminous intensity?
👉 Candela
236. What is the height of geostationary satellite from Earth?
👉 36000 km
237. Bulb filament is made of which metal?
👉 Tungsten
238. What is the source of the Sun’s energy?
👉 Nuclear fusion
239. Hydrogen bomb is based on which principle?
👉 Nuclear fusion
240. Atomic bomb is based on which principle?
👉 Nuclear fission
241. Which element is used in nuclear fission?
👉 Uranium
242. Rocket’s motion is based on which principle?
👉 Law of Conservation of Momentum
243. Radioactivity is measured by what?
👉 Geiger-Muller Counter
244. How is myopia corrected?
👉 Concave lens
245. How is hypermetropia corrected?
👉 Convex lens
246. Which mirror is used for shaving and medical check-ups?
👉 Concave mirror
247. Which gas is mainly used in electric bulbs?
👉 Inert gas
248. What is the SI unit of energy?
👉 Joule
249. What is the purest form of water?
👉 Rainwater
250. What fraction of Earth's gravity is on the Moon?
👉 1/6th part
251. Which is the only metal found in liquid state at room temperature?
👉 Mercury
252. Why is the water in a clay pot cool?
👉 Due to Evaporation
253. In which form do plants absorb nitrogen?
👉 Nitrate
254. What is the main cause of heart diseases?
👉 Cholesterol
255. Acidic igneous rocks have a high percentage of which element?
👉 Silica
256. What is the innermost layer of the Earth called?
👉 Core
257. What type of compound is protein?
👉 Polypeptides
258. What type of image is formed on the human retina?
👉 Real and Inverted
259. What is the proportion of fresh water in total water on Earth?
👉 Approximately 2.5%
260. What is used to measure the purity of milk?
👉 Lactometer
261. What is the main gas in biogas?
👉 Methane (CH₄)
262. Who invented the microphone?
👉 Graham Bell
263. Diabetes occurs due to deficiency of which hormone?
👉 Lack of insulin
264. When does a solar eclipse occur?
👉 When the Moon comes between the Earth and the Sun
265. Which acid is used in car batteries?
👉 Sulphuric acid
266. What is the study of sound called
👉 Acoustics
267. What is blood group 'O' known as?
👉 Universal Donor
268. Which gas do plants absorb during the day?
👉 Carbon Dioxide
269. Which gas do plants release during the day?
👉 Oxygen
270. 'Monoculture' is a feature of which farming system?
👉 Shifting agriculture system
271. What does a pitcher plant eat?
👉 Insects
272. Dengue fever spreads through which mosquito?
👉 Aedes mosquito
273. What is the weight of the human brain?
👉 1350–1400 grams
274. What helps in establishing parentage?
👉 DNA and Fingerprints
275. What sugar is found in milk?
👉 Lactose
276. 1 horsepower is equal to how many watts?
👉 746 वाट | 746 watts
277. At what temperature is water's density maximum?
👉 4°C
278. What is the smallest part of matter?
👉 Atom
279. What is the unit of lens power?
👉 Dioptre
280. What is the middle color of a rainbow?
👉 Green
281. Dispersion of colors depends on what?
👉 Wavelength
282. Fuse wire is made from which material?
👉 Alloy of tin and lead
283. Why does the sea water appear blue?
👉 Due to scattering of light
284. What causes stars to twinkle?
👉 Refraction of light
285. What causes diamond's sparkle and mirage?
👉 Total internal reflection
286. What is the speed of light in vacuum?
👉 3 × 10⁸ m/s
287. Which acid is used in food preservation?
👉 Benzoic acid
288. Why is the speed of light slower in glass?
👉 Due to dispersion of light
289. What is the ore of mercury?
👉 Cinnabar
290. What indicates lack of blood?
👉 Low Hemoglobin
291. What is the instrument to measure blood pressure?
👉 Sphygmomanometer
292. What is the chemical name of laughing gas?
👉 Nitrous Oxide (N₂O)
293. What is used to measure electric current?
👉 Ammeter
294. Which are scalar quantities?
👉 Work, Energy, Heat, Time, Speed
295. Which are vector quantities?
👉 Acceleration, Force, Displacement, Momentum
296. Which color has the highest wavelength?
👉 Red
297. Which color has the lowest wavelength?
👉 Violet
298. What is the most elastic substance?
👉 Steel
299. What is called dry ice?
👉 Solid Carbon Dioxide
300. What is found in the nucleus of an atom?
👉 Protons and Neutrons
301. What causes green color in firecrackers?
👉 Barium
302. Non-stick utensils are coated with?
👉 Teflon
303. Which inert gas is not found in atmosphere?
👉 Radon
304. Which gas is used in balloons?
👉 Helium gas
305. Which chemical is used in photography?
👉 Silver bromide
306. What is the best conductor of electricity?
👉 Silver
307. What is used for artificial rain?
👉 Silver iodide
308. What is the alloy of iron, nickel & chromium called?
👉 Stainless steel
309. Solder is an alloy of which metals?
👉 Lead and Tin
310. Saliva helps in digestion of?
👉 Starch
311. ATP is the unit of?
👉 Energy
312. Who first used the term 'Cell'?
👉 Robert Hooke
313. Full form of AIDS?
👉 Acquired Immuno Deficiency Syndrome
314. AIDS affects which blood cells?
👉 White Blood Cells
315. Main cause of Chicken Pox?
👉 Varicella Virus
316. Number of chromosomes in frog?
👉 26
317. Longest cell in human body?
👉 Nerve Cell (90 cm)
318. Which metal is coated on iron for galvanization?
👉 Zinc
319. What are atoms made of?
👉 Extremely tiny particles
320. What are the three main particles of an atom?
👉 Electron, Proton, and Neutron
321. What is the use of X-rays?
👉 Detecting broken bones and lung diseases
322. What is present in the nucleus of an atom?
👉 Protons and Neutrons
323. What are isotopes?
👉 Same atomic number, different mass number
324. What are isobars?
👉 Different atomic number, same mass number
325. How many atoms in 1 mole?
👉 6.022 × 10²³ atoms
326. Which gas is most abundant in atmosphere?
👉 Nitrogen (78%)
327. Ignition temperature of white phosphorus?
👉 30°C
328. Ignition temperature of red phosphorus?
👉 260°C
329. What are the properties of oxygen?
👉 Colorless, odorless, tasteless
330. What is sulfur used in?
👉 Gunpowder, fireworks, matchsticks
331. Which instrument measures humidity?
👉 Hygrometer
332. In which medium is sound travelling at its maximum speed?
👉 Steel
333. How many cells are there in the human body?
👉 Around 500 trillion
334. Who discovered chromosomes?
👉 Waldeyer
335. What is the process of forming RNA from DNA called?
👉 Transcription
336. What is the study of algae called?
👉 Phycology
337. What nutrients are found in algae?
👍 Carbohydrates, Vitamins, Inorganic substances
338. Which is the smallest flower?
👉 Wolffia
339. Which plant has the largest flower?
👉 Rafflesia
340. Which plant has the largest leaf?
👉 Victoria Regia
341. Which plant has the smallest seed?
👉 Orchid
342. What provides energy to the body?
👉 Carbohydrates & Fats
343. How much water is in the human body?
👉 Around 65-80%
344. Which element is found in thyroxine hormone?
👉 Iodine
345. What is the normal body temperature in Kelvin?
👉 310K
346. What causes malnutrition?
👉 Inadequate & unbalanced diet
347. How many types of amino acids are found in human body?
👉 20 types
348. Which nutrients are found in milk?
👉 Protein, Carbohydrate, Calcium, Potassium
349. What is Pituitary gland called?
👉 Master Gland
350. Which gland controls blood pressure?
👉 Medulla gland
351. Where is insulin secreted from?
👉 Pancreas
352. What is a plant with seed not enclosed in fruit called?
👉 Gymnosperm
353. What is the study of vegetables called?
👉 Olericulture
354. Why does tomato turn red when ripened?
👉 Due to Lycopene
355. What is the largest bird in the world?
👉 Ostrich
356. What is the hardest substance in the human body?
👉 Enamel
357. Speed of sound in air?
👉 332 m/s
358. Speed of sound in water?
👉 1483 m/s
359. Speed of sound in sea water?
👉 1533 m/s
360. Speed of sound in iron?
👉 5130 m/s
361. Speed of sound in mercury?
👉 1450 m/s
362. Speed of sound in glass?
👉 5640 m/s
363. Speed of sound in aluminum?
👉 6420 m/s
364. Speed of sound in alcohol?
👉 1213 m/s
365. Speed of sound in carbon dioxide?
👉 260 m/s
366. Speed of sound in hydrogen?
👉 1269 m/s
367. What is the distance travelled per unit time called?
👉 Speed
368. What is the distance covered in a specific direction called?
👉 Velocity
369. What type of quantity is velocity?
👉 Vector quantity
370. What type of quantity is speed?
👉 Scalar quantity
371. What is the change in position in a particular direction called?
👉 Displacement
372. Change in velocity per unit time is called?
👉 Acceleration
373. What type of quantities are acceleration and displacement?
👉 Vector quantities
374. What does Newton's First Law of Motion state?
👉 A body remains in rest or motion unless acted upon by an external force
375. In which direction do passengers lean when a stopped vehicle starts suddenly?
👉 Backward
376. When a moving vehicle stops suddenly, in which direction do passengers lean?
👉 Forward
377. Which acid found in lemon?
👉 Citric Acid
378. How is gasohol formed?
👉 Mixture of petrol and ethanol
379. Who discovered positron?
👉 Anderson
380. What protects Earth from UV rays?
👉 Ozone layer
381. What is unit of surface tension?
👉 Newton per meter
382. Which chemical is deficient in dehydration?
👉 Sodium Chloride
383. Who proposed E = mc²?
👉 Einstein
384. Rocket works on which principle?
👉 Law of Conservation of Momentum
385. What is functional unit of kidney?
👉 Nephron
386. Which vitamin is deficient in an alcoholic person?
👉 Vitamin C
387. Which gas is emitted from volcanoes?
👉 Sulphur Dioxide
388. Who discovered Lysosome?
👉 D. Duve, 1958
389. What is called the protein factory?
👉 Ribosome
390. Who synthesizes protein?
👉 Ribosome
391. What are DNA and RNA?
👉 Nucleic Acids
392. What is the functional unit of DNA called?
👉 Gene
393. Who first synthesized a gene?
👉 Har Gobind Khorana
394. Which chromosome does a boy inherit from father?
👉 22 + Y
395. Rhizome is which form of the plant?
👉 Stem
396. Which tissue transports water and minerals in plants?
👉 Xylem
397. How is food transported to other parts of the plant?
👉 Phloem
398. Which instrument measures stem growth?
👉 Auxanometer
399. Which organelle is called "Suicidal Bag"?
👉 Lysosome
400. What does Barometer measure?
👉 Atmospheric Pressure
401. What is a stethoscope used for?
👉 Listening to heart & lungs
402. What does a cardiogram check for?
👉 Heartbeat
403. What does Hydrometer measure?
👉 Relative density of liquid
404. What pressure does a manometer measure?
👉 Roots of plants
405. What is the function of a rain gauge?
👉 Rainfall measurement
406. What does the Richter scale measure?
👉 Earthquake intensity
407. Lactometer measures the purity of what?
👉 Milk purity
408. What is a fathometer used for?
👉 Sea depth
409. What does an anemometer measure?
👉 Wind force & speed
410. What does Hygrometer measure?
👉 Humidity of atmosphere
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