In you ladder analogy it would be the rungs. About half is each rung is one base (the other half being is pair obviously)
Adeninine - Thiamine and Guanine - Cytosine pairs.
Each strand is made up of a chain of nucleotides.The two strands are held together by hydrogen bonds between adenine and thymine and between guanine and cytosine. The hydrogen bonds of DNA are analogous to the rungs of a twisted ladder. The sugar-phosphate backbones of the double helix are analogous to the sides of a twisted ladder.
The sides of the DNA ladder are composed of alternating Phosphate and deoxyribose (sugar) molecules.
what holds the sides of the DNA ladder together
DNA passes through a gel at different speeds depending on its size. The purpose of the ladder marker of a DNA is to make the passing of DNA possible.
The DNA ladder is made of sugar and phosphates.
the rails
the rails
The part of the twisted ladder or double helix of DNA is made for the nucleotide bases are adenine always pairs up with thymine on the other side, guanine always pairs up with cytosine.
nucleotitdes
sugar phospate
The sugar used in the DNA ladder is deoxyribose. It is a five-carbon sugar that forms part of the DNA backbone and is essential for the stability and structure of the DNA molecule.
The Base Pairs
Adeninine - Thiamine and Guanine - Cytosine pairs.
Each strand is made up of a chain of nucleotides.The two strands are held together by hydrogen bonds between adenine and thymine and between guanine and cytosine. The hydrogen bonds of DNA are analogous to the rungs of a twisted ladder. The sugar-phosphate backbones of the double helix are analogous to the sides of a twisted ladder.
The sides of the DNA ladder are composed of alternating Phosphate and deoxyribose (sugar) molecules.
The Sides of this ladder equate to the Dna's Sugar-Phosphate Backbone; the Rungs of this ladder equate to the Hydrogen-bonding that takes place between base pairs.