πŸ“Š Biology
Q. Which organ secretes bile?
  • (A) Pancreas
  • (B) Liver
  • (C) Gall bladder
  • (D) Stomach
πŸ’¬ Discuss
βœ… Correct Answer: (B) Liver

Explanation: Liver produces bile; gall bladder stores it.

πŸ“Š Biology
Q. Which hormone is called emergency hormone?
  • (A) Insulin
  • (B) Adrenaline
  • (C) Thyroxine
  • (D) Cortisol
πŸ’¬ Discuss
βœ… Correct Answer: (B) Adrenaline

Explanation: Adrenaline prepares body for fight or flight.

πŸ“Š Biology
Q. Which is the site of Calvin cycle?
  • (A) Thylakoid
  • (B) Stroma
  • (C) Matrix
  • (D) Cytoplasm
πŸ’¬ Discuss
βœ… Correct Answer: (B) Stroma

Explanation: Calvin cycle occurs in chloroplast stroma.

πŸ“Š Biology
Q. Which enzyme breaks hydrogen bonds in DNA?
  • (A) Ligase
  • (B) Helicase
  • (C) Polymerase
  • (D) Primase
πŸ’¬ Discuss
βœ… Correct Answer: (B) Helicase

Explanation: Helicase unwinds DNA.

πŸ“Š Biology
Q. Which structure forms spindle fibers?
  • (A) Centrosome
  • (B) Ribosome
  • (C) Golgi body
  • (D) Lysosome
πŸ’¬ Discuss
βœ… Correct Answer: (A) Centrosome

Explanation: Centrosome organizes spindle fibers.

πŸ“Š Biology
Q. Which hormone regulates sleep cycle?
  • (A) Melatonin
  • (B) Insulin
  • (C) Thyroxine
  • (D) Estrogen
πŸ’¬ Discuss
βœ… Correct Answer: (A) Melatonin

Explanation: Melatonin controls circadian rhythm.

πŸ“Š Biology
Q. Which part of brain regulates temperature?
  • (A) Cerebrum
  • (B) Hypothalamus
  • (C) Cerebellum
  • (D) Medulla
πŸ’¬ Discuss
βœ… Correct Answer: (B) Hypothalamus

Explanation: Hypothalamus maintains body temperature.

πŸ“Š Biology
Q. Which type of immunity is provided by vaccines?
  • (A) Natural immunity
  • (B) Artificial active immunity
  • (C) Passive immunity
  • (D) Innate immunity
πŸ’¬ Discuss
βœ… Correct Answer: (B) Artificial active immunity

Explanation: Vaccines stimulate active immune response.

πŸ“Š Biology
Q. Which plant hormone causes fruit ripening?
  • (A) Auxin
  • (B) Gibberellin
  • (C) Ethylene
  • (D) Cytokinin
πŸ’¬ Discuss
βœ… Correct Answer: (C) Ethylene

Explanation: Ethylene promotes ripening.

πŸ“Š Biology
Q. Which structure carries oxygen in blood?
  • (A) Plasma
  • (B) Hemoglobin
  • (C) Platelets
  • (D) WBC
πŸ’¬ Discuss
βœ… Correct Answer: (B) Hemoglobin

Explanation: Hemoglobin binds oxygen.

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