Selected MCQ

Current Question
Which enzyme breaks hydrogen bonds in DNA?
  • A. Ligase
  • B. Helicase
  • C. Polymerase
  • D. Primase
Correct Answer: B
Explanation:
Helicase unwinds DNA strands.
Related Question 1
Which enzyme breaks starch?
  • A. Lipase
  • B. Amylase
  • C. Protease
  • D. Nuclease
Correct Answer: B
Explanation:
Amylase digests starch.
Related Question 2
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 3
Which process breaks rocks?
  • A. Weathering
  • B. Fusion
  • C. Respiration
  • D. Photosynthesis
Correct Answer: A
Explanation:
Weathering disintegrates rocks.
Related Question 4
Which enzyme catalyzes RNA synthesis?
  • A. DNA polymerase
  • B. RNA polymerase
  • C. Ligase
  • D. Helicase
Correct Answer: B
Explanation:
RNA polymerase transcribes DNA.
Related Question 5
Which spectral line series lies in visible region for hydrogen?
  • A. Lyman
  • B. Balmer
  • C. Paschen
  • D. Brackett
Correct Answer: B
Explanation:
Balmer series transitions produce visible light.