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MCQ Practice

General Science (Everyday Science) MCQs

Which ocean is smallest?

  • A. Atlantic
  • B. Indian
  • C. Arctic
  • D. Pacific
Explanation:
Arctic Ocean is smallest.

Which boundary forms mountains?

  • A. Divergent
  • B. Convergent
  • C. Transform
  • D. Rift
Explanation:
Compression uplifts mountains.

Which rock is intrusive igneous?

  • A. Basalt
  • B. Granite
  • C. Sandstone
  • D. Slate
Explanation:
Granite forms underground.

Which gas contributes to ozone depletion?

  • A. CO₂
  • B. CFC
  • C. N₂
  • D. O₂
Explanation:
CFCs release chlorine radicals.

Which biome is driest?

  • A. Desert
  • B. Rainforest
  • C. Tundra
  • D. Grassland
Explanation:
Deserts have minimal precipitation.

Which blood vessel carries oxygenated blood?

  • A. Vein
  • B. Artery
  • C. Capillary
  • D. Venule
Explanation:
Arteries carry oxygen-rich blood (except pulmonary).

Which phase of cell cycle duplicates DNA?

  • A. G1
  • B. S
  • C. G2
  • D. M
Explanation:
DNA synthesis occurs in S phase.

Which organelle modifies proteins?

  • A. Ribosome
  • B. Golgi
  • C. Lysosome
  • D. Nucleus
Explanation:
Golgi processes and packages proteins.

Which process converts DNA to RNA?

  • A. Translation
  • B. Transcription
  • C. Replication
  • D. Mutation
Explanation:
Transcription synthesizes RNA.

Which structure controls gene expression?

  • A. DNA
  • B. RNA
  • C. Protein
  • D. All
Explanation:
Regulation involves DNA, RNA, and proteins.