Question

To which of the following does guanine form hydrogen bonds in Dna
Adenine
Thymine
Cytosine
Guanine

Answer 1

Guanine forms hydrogen bonds with Cytosine in DNA.

• DNA is a macromolecule found in all living organisms, except few viruses. It is made up of many nucleotides joined by phosphodiester bonds.
• One of the components of these nucleotides is the nitrogenous base which is bonded to the 1' carbon of the pentose sugar.
• Nitrogenous bases are of two types- purines and pyrimidines, which form hydrogen bonds between each other.
• Adanine forms two hydrogen bonds with Thymine, while Guanine forms three hydrogen bonds with Cytosine.
• These bonds give stability to the structure of DNA.