Multiple choice

The enzyme unwinding the DNA strands are

  1. DNA topoisomerases

  2. helicases

  3. SSB protein (single-stranded DNA-binding protein)

  4. DNA ligase

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Helicases are proteins that unwind DNA using energy of ATP and create two potential replication forks. 5' to 3' helicase unwind DNA from 5' single stranded end while 3' to 5' helicase unwind DNA at 3' single stranded end.