use glue
Hydrogen bonds.
Hydrogen bonds hold together the two strands of DNA. These bonds form between specific base pairs: adenine (A) with thymine (T), and guanine (G) with cytosine (C), creating the double helix structure of DNA.
Hydrogen bonds between the purines and pyrimidines. A and T form 2 hydrogen bonds, and G and C form three.
Hydrogen bonds
dna binding protein binds the 2 anti parallel strands of dna together
Centromere.
2
Find the other 2 sides and then add the 4 sides together.
Lots of forces do that.
A phosphate group bonded covalently to a sugar molecule.
The centromere is the part of a chromosome that links the sister chromatids together. There are two types of centromeres. Regional centromeres have DNA sequences that contribute to, but do not define function. Point centromeres are smaller and more compact, but the DNA sequences are necessary and sufficient to specify the centromere's identity and function.
Each decagon has 10 sides, each nonagon has 9 sides and each pentagon has 5 sides. 4 decagons make 40 sides, 2 nonagons make 18 sides and 2 pentagons make 10 sides. When you add them all up together, you get 68 sides in total.