Complementary base pairing is the phenomenon where in DNA guanine always hydrogen bonds to cytosine and adenine always binds to thymine. The bond between guanine and cytosine shares three hydrogen bonds compared to the A-T bond which always shares two hydrogen bonds.

What is the complementary base pairing of DNA?

The four nitrogenous bases of DNA are thymine, adenine, guanine, and cytosine. Guanine and cytosine are bonded together by three hydrogen bonds; whereas, adenine and thymine are bonded together by two hydrogen bonds. This is known as complementary base pairing.

What does C pair with in RNA?

In DNA/RNA base pairing, adenine (A) pairs with uracil (U), and cytosine (C) pairs with guanine (G).