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 made up of sugar-phosphate backbones. The sugar in DNA is deoxyribose, linked together by phosphate groups forming the backbone of the DNA strand.
The sides of the DNA ladder are formed by alternating sugar and phosphate molecules. These sugar-phosphate backbones run parallel to each other on opposite sides of the double helix structure of the DNA molecule.
The sides of the DNA ladder are made up of alternating sugar (deoxyribose) and phosphate molecules, linked together in a chain. These sugar-phosphate backbones provide the structural support for the DNA molecule.
The DNA ladder is made of sugar and phosphates.
the rails
the rails
The sugar-phosphate backbone of DNA is made up of alternating sugar (deoxyribose) and phosphate molecules. These molecules form the "rungs" of the DNA ladder, connecting the nitrogenous bases that make up the steps of the ladder.
nucleotitdes
sugar phospate
Sugar used in the DNA ladder is a five carbon sugar known as deoxyribose.
Adeninine - Thiamine and Guanine - Cytosine pairs.
The Base 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 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.
The nucleotide bases of DNA are located at the center of the twisted ladder or double helix structure. They are paired up across the helix, with adenine pairing with thymine and guanine pairing with cytosine through hydrogen bonds.