Selected MCQ

Current Question
Which structure is site of protein synthesis?
  • A. Nucleus
  • B. Ribosome
  • C. Lysosome
  • D. Golgi
Correct Answer: B
Explanation:
Ribosomes assemble amino acids.
Related Question 1
Which level of protein structure is most directly stabilized by hydrogen bonds between backbone groups?
  • A. Primary
  • B. Secondary
  • C. Tertiary only
  • D. Quaternary only
Correct Answer: B
Explanation:
(\alpha)-helices and (\beta)-sheets arise from backbone hydrogen bonding patterns.
Related Question 2
Which blood protein transports iron?
  • A. Hemoglobin
  • B. Albumin
  • C. Transferrin
  • D. Fibrin
Correct Answer: C
Explanation:
Transferrin carries iron.
Related Question 3
Which structure forms spindle fibers?
  • A. Ribosome
  • B. Centrosome
  • C. Lysosome
  • D. Golgi
Correct Answer: B
Explanation:
Centrosomes organize spindle.
Related Question 4
Which gas is essential for photosynthesis?
  • A. O₂
  • B. CO₂
  • C. N₂
  • D. H₂
Correct Answer: B
Explanation:
CO₂ is carbon source.
Related Question 5
Which organelle modifies proteins?
  • A. Ribosome
  • B. Golgi
  • C. Lysosome
  • D. Nucleus
Correct Answer: B
Explanation:
Golgi processes and packages proteins.