Science Olympiad : General Biology MCQ set - 13
CELL BIOLOGY
Q01. National Science Day celebrated on?
Ans: 28 February
Q02. Proponents of cell theory ?
Ans: Schleiden and Schwann
Q03. Discoverer of cell ?
Ans: Robert Hooke
Q04. Author of Micrographia?
Ans: Robert Hooke
Q05. Cell wall is made of ?
Ans: Cellulose
Q06. Smallest cell ?
Ans: Mycoplasma
Q07. Smallest cell organelle ?
Ans: Ribosome
Q08. Largest cell organelle ?
Ans: Nucleus
Q09. Who named mitochondria?
Ans: Carl Benda
Q10. Discoverer of Golgi body ?
Ans: Camillo Golgi
Q11. Golgi body made of ?
Ans: Lipids and proteins
VITAMINS
Q12. Who coined the term vitamin ?
Ans: Casimir Funk
Q13. Discoverer of Vitamin A ?
Ans: McCollum
Q14. Discoverer of Vitamin B ?
Ans: McCollum
Q15. Discoverer of Vitamin C ?
Ans: Holst and Fröhlich
Q16. Discoverer of Vitamin D ?
Ans: Hopkins
Q17. Vitamin present in carrot ?
Ans: Vitamin A
Q18. Chemical name of Vitamin A ?
Ans: Retinol
Q19. Deficiency of Vitamin A causes ?
Ans: Night blindness
Q20. Chemical name of Vitamin B₁ ?
Ans: Thiamine
Q21. Vitamin C richest source ?
Ans: Amla
Q22. Vitamin obtained from sunlight ?
Ans: Vitamin D
Q23. Weight of human kidney ?
Ans: 150 g
PHYSICS & MISCELLANEOUS
Q24. Use of potassium nitrate ?
Ans: Fertilizer
Q25. Gas filled in electric bulb ?
Ans: Nitrogen
Q26. Washing soda chemical name ?
Ans: Sodium carbonate
Q27. Pencil lead made of ?
Ans: Graphite
Q28. Liquid non-metal at room temperature ?
Ans: Bromine
Q29. Unit of sound intensity ?
Ans: Decibel
Q30. Raw material for paper ?
Ans: Wood
Q31. Rayon is chemically ?
Ans: Cellulose
Q32. Soap is sodium/potassium salt of ?
Ans: Fatty acids
Q33. Petroleum wax ?
Ans: Paraffin wax
Q34. Brain’s largest part ?
Ans: Cerebrum
Q35. Locomotion in Amoeba ?
Ans: Pseudopodia
Q36. Respiration site of cell ?
Ans: Mitochondria
Q37. Energy produced in mitochondria ?
Ans: 38 ATP
Q38. Fungal cell wall made of ?
Ans: Chitin
Q39. Study of fungi called ?
Ans: Mycology
Q40. Discoverer of nucleus ?
Ans: Robert Brown
Q41. Malaria Day observed on ?
Ans: 25 April
Q42. Law of inertia given by ?
Ans: Isaac Newton
Q43. Purest form of carbon ?
Ans: Coke
Q44. Coal gas chemical formula ?
Ans: CH₄ + H₂
CHEMISTRY
Q45. Who proposed the Triad Law of classification ?
Ans: Johann Wolfgang Döbereiner
Explanation: He grouped elements into triads having similar properties and atomic masses.
Q46. Who proposed the Law of Octaves ?
Ans: John Newlands
Explanation: Every eighth element showed similar properties.
Q47. Who gave the Periodic Table ?
Ans: Dmitri Mendeleev
Explanation: He arranged elements according to increasing atomic mass.
Q48. Who discovered the Modern Periodic Table ?
Ans: Henry Moseley
Explanation: He arranged elements according to atomic number.
Q49. How many periods are there in the periodic table ?
Ans: 7
Explanation: Periods are horizontal rows.
Q50. How many groups are there in the periodic table ?
Ans: 18
Explanation: Groups are vertical columns.
Q51. How many elements are known till now ?
Ans: 118
Explanation: Elements up to atomic number 118 are officially recognized.
Q52. Which is the heaviest noble gas ?
Ans: Radon (Rn)
Explanation: It has the highest atomic mass among noble gases.
Q53. Which is the most poisonous gas ?
Ans: Carbon monoxide (CO)
Explanation: It prevents oxygen transport in blood.
Q54. Which gas is used in photosynthesis ?
Ans: Carbon dioxide (CO₂)
Explanation: Plants use CO₂ to make food.
Q55. Why does diamond shine ?
Ans: Total internal reflection
Explanation: Light reflects repeatedly inside diamond.
Q56. How is diamond purity measured ?
Ans: Carat
Explanation: Carat measures weight and purity.
Q57. Which is the densest metal ?
Ans: Osmium
Explanation: It has the highest density among metals.
Q58. Who discovered hydrogen ?
Ans: Henry Cavendish
Explanation: He identified hydrogen as a distinct gas.
Q59. Which halogen has the largest atomic size ?
Ans: Iodine
Explanation: Atomic size increases down the group.
Q60. Which acid is used in lead storage batteries ?
Ans: Sulphuric acid
Explanation: It acts as an electrolyte.
Q61. Who discovered the pH scale ?
Ans: S. P. Sørensen
Explanation: He introduced the concept of acidity and alkalinity.
Q62. What is the pH of a neutral solution ?
Ans: 7
Explanation: Neutral solutions are neither acidic nor basic.
Q63. Which is the most malleable metal ?
Ans: Gold
Explanation: It can be beaten into very thin sheets.
Q64. Mercury exists in which state at room temperature ?
Ans: Liquid
Explanation: Mercury is the only liquid metal.