- A) Helicase
- B) DNA polymerase
- C) Ligase
- D) Topoisomerase
Genetics MCQ
Total MCQ: 20
2 What is the function of DNA polymerase during replication?
- A) Unwinds the DNA
- B) Synthesizes new RNA strands
- C) Adds nucleotides to the growing DNA strand
- D) Joins Okazaki fragments
3 In which direction does DNA replication occur?
- A) 5' to 3'
- B) 3' to 5'
- C) Both directions simultaneously
- D) 3' to 3'
4 What is the role of primase in DNA replication?
- A) Unwinds the DNA
- B) Synthesizes the RNA primer
- C) Adds nucleotides to the new strand
- D) Removes RNA primers
5 What is the function of ligase in DNA replication?
- A) Unwinds the DNA
- B) Adds nucleotides to the growing strand
- C) Joins Okazaki fragments
- D) Synthesizes RNA primers
6 Which strand is synthesized discontinuously during DNA replication?
- A) Leading strand
- B) Lagging strand
- C) Both strands simultaneously
- D) Both strands continuously
7 What is the purpose of the RNA primer in DNA replication?
- A) To bind to the leading strand
- B) To provide a 3' OH group for DNA polymerase
- C) To unwind the DNA helix
- D) To remove nucleotides from the lagging strand
8 During which phase of the cell cycle does DNA replication occur?
- A) G1 phase
- B) G2 phase
- C) S phase
- D) M phase
9 What is the function of topoisomerase during DNA replication?
- A) Adds nucleotides to the growing strand
- B) Relieves the strain caused by unwinding DNA
- C) Synthesizes RNA primers
- D) Joins Okazaki fragments
10 What is the name of the short segments of DNA synthesized on the lagging strand?
- A) Okazaki fragments
- B) Leading fragments
- C) Replication bubbles
- D) Primer fragments