Selected MCQ

Current Question
The Hadley cell is primarily driven by:
  • A. Polar cooling only
  • B. Differential solar heating between equator and subtropics
  • C. Tidal friction
  • D. Lunar gravity
Correct Answer: B
Explanation:
Strong equatorial heating drives rising air and tropical atmospheric overturning.
Related Question 1
Which blood cells carry oxygen?
  • A. WBC
  • B. RBC
  • C. Platelets
  • D. Plasma
Correct Answer: B
Explanation:
Red blood cells transport oxygen.
Related Question 2
Which phase of cell cycle duplicates DNA?
  • A. G1
  • B. S
  • C. G2
  • D. M
Correct Answer: B
Explanation:
DNA synthesis occurs in S phase.
Related Question 3
Which cell organelle controls activities?
  • A. Ribosome
  • B. Nucleus
  • C. Golgi
  • D. Mitochondria
Correct Answer: B
Explanation:
Nucleus regulates cell.
Related Question 4
Which cell type lacks nucleus?
  • A. Neuron
  • B. RBC
  • C. WBC
  • D. Muscle cell
Correct Answer: B
Explanation:
Mature RBCs lack nucleus.
Related Question 5
Which blood cells fight infection?
  • A. RBC
  • B. Platelets
  • C. WBC
  • D. Plasma
Correct Answer: C
Explanation:
White blood cells defend body.