Multiple choice

Which enzyme unwinds DNA and how does it do this?

  1. DNA Polymerase III by breaking hydrogen bonds

  2. Helicase by breaking hydrogen bonds

  3. DNA Polymerase III by breaking covalent bonds

  4. Helicase by breaking covalent bonds

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

Helicase is the enzyme that unwinds the DNA double helix by breaking the hydrogen bonds between the complementary nitrogenous bases.