The complementary bases in DNA are held together by hydrogen bonds.

Quick Scoop

  • In DNA, adenine (A) pairs with thymine (T) using two hydrogen bonds.
  • Guanine (G) pairs with cytosine (C) using three hydrogen bonds, making G–C pairs slightly stronger than A–T pairs.
  • These hydrogen bonds link the complementary bases across the two strands and help stabilize the double helix structure.

So, when you see a question like “what type of bond holds the complementary bases together?” the precise answer is: hydrogen bonds between the nitrogenous bases.

Information gathered from public forums or data available on the internet and portrayed here.