What Holds the Sides of the DNA Ladder Together?
DNA, the blueprint of life, is structured like a twisted ladder known as a double helix. The sides of this ladder, also called the sugar-phosphate backbone, are held together by strong covalent bonds between deoxyribose sugar molecules and phosphate groups. These bonds provide stability and structure to the DNA molecule.
The rungs of the ladder, made up of nitrogenous base pairs (A-T and C-G), are connected by hydrogen bonds. While these bonds are weaker than covalent bonds, their temporary nature allows DNA to unzip during processes like replication and transcription. This combination of strength and flexibility ensures DNA functions effectively in storing and transmitting genetic information.