Science Olympiad : General Biology MCQ set - 15
Q01. Which is the largest blood vessel ?
Ans: Aorta
Explanation: It carries oxygenated blood from heart.
Q02. Which artery carries deoxygenated blood ?
Ans: Pulmonary artery
Explanation: It carries blood from heart to lungs.
Q03. Who performed the first heart transplant ?
Ans: Dr. Christiaan Barnard
Explanation: Performed in 1967.
CELL BIOLOGY
Q04. National Science Day is celebrated on ?
Ans: 28 February
Explanation: Marks discovery of Raman Effect.
Q05. Who proposed the cell theory ?
Ans: Schleiden and Schwann
Explanation: All living organisms are made of cells.
Q06. Who discovered the cell ?
Ans: Robert Hooke
Explanation: Observed cork cells.
Q07. Cell wall is made of ?
Ans: Cellulose
Explanation: Provides rigidity to plant cells.
Q08. Which is the smallest cell ?
Ans: Mycoplasma
Explanation: It lacks a cell wall.
Q09. Smallest cell organelle ?
Ans: Ribosome
Explanation: Site of protein synthesis.
Q10. Largest cell organelle ?
Ans: Nucleus
Explanation: Controls cell activities.
Q11. Who named mitochondria?
Ans: Carl Benda
Explanation: Means “thread-like granules”.
Q12. What is the powerhouse of the cell ?
Ans: Mitochondria
Explanation: Produces ATP.
VITAMINS
Q13. Who coined the term vitamin ?
Ans: Casimir Funk
Explanation: Identified vitamins as essential nutrients.
Q14. Deficiency of Vitamin A causes ?
Ans: Night blindness
Explanation: Vitamin A is essential for vision.
Q15. Chemical name of Vitamin A?
Ans: Retinol
Explanation: Fat-soluble vitamin.
Q16. Vitamin obtained from sunlight ?
Ans: Vitamin D
Explanation: Synthesized in skin by UV rays.
Q17. Richest source of Vitamin C ?
Ans: Amla
Explanation: Contains very high Vitamin C.
Physics & Misc.
Q18. Which gas is filled in electric bulbs ?
Ans: Nitrogen
Explanation: Prevents oxidation of filament.
Q19. Pencil lead is made of ?
Ans: Graphite
Explanation: A form of carbon.
Q20. Which non-metal is liquid at room temperature ?
Ans: Bromine
Explanation: Only liquid non-metal.
Q21. Unit of sound intensity ?
Ans: Decibel
Explanation: Measures loudness.
Q22. Study of fungi is called ?
Ans: Mycology
Explanation: Branch of biology.
Q23. Who discovered the nucleus ?
Ans: Robert Brown
Explanation: Observed in plant cells.
Q24. Law of inertia was given by ?
Ans: Isaac Newton
Explanation: First law of motion.
Q25. Chemical composition of coal gas ?
Ans: CH₄ + H₂
Explanation: Mainly methane and hydrogen.