Selected MCQ

Current Question
Independent assortment occurs because homologous chromosome pairs:
  • A. Replicate at different times
  • B. Align randomly at metaphase I
  • C. Separate in mitosis only
  • D. Undergo mutation during cytokinesis
Correct Answer: B
Explanation:
Random orientation of homologs generates different combinations in gametes.
Related Question 1
Which stage aligns chromosomes at equator?
  • A. Prophase
  • B. Metaphase
  • C. Anaphase
  • D. Telophase
Correct Answer: B
Explanation:
Chromosomes line up in metaphase.
Related Question 2
The wavefunction of a particle must be continuous because:
  • A. It represents force
  • B. Its square gives probability density
  • C. It represents velocity
  • D. It defines temperature
Correct Answer: B
Explanation:
Discontinuity would imply undefined probability.
Related Question 3
Which gas exchange occurs in alveoli?
  • A. O₂ out, CO₂ in
  • B. CO₂ out, O₂ in
  • C. Both out
  • D. None
Correct Answer: B
Explanation:
Oxygen diffuses into blood, CO₂ out.
Related Question 4
The speed of light in vacuum is invariant because:
  • A. It depends on observer motion
  • B. It is defined constant in relativity
  • C. It varies with energy
  • D. It depends on medium
Correct Answer: B
Explanation:
Special relativity postulates constant light speed in all inertial frames.
Related Question 5
A confined aquifer differs from an unconfined aquifer because it is:
  • A. Unsaturated
  • B. Bounded above by a low-permeability layer
  • C. Composed only of limestone
  • D. Always shallower
Correct Answer: B
Explanation:
A confining layer restricts flow and can produce artesian pressure.