There are 2" hydrogen bonds" b/w adenine and thymine and 3 hydrogen bonds b/w guanine and cytosine and there are 10 BP in each turn,there are 4 "gycosidic bonds" each occurring with one of four dna bases, there are 22 phosphodiester bonds and there are 18 "phosphoester bonds" "hope it'll help"

Hydrogen Bonds in DNA:
- DNA (deoxyribonucleic acid) is a double-stranded molecule composed of two polynucleotide chains held together by hydrogen bonds.
- Hydrogen bonds are formed between the nitrogenous bases of the two DNA strands.
- Adenine (A) forms two hydrogen bonds with thymine (T), while guanine (G) forms three hydrogen bonds with cytosine (C).
- The hydrogen bonds between A and T (or U in RNA) and between G and C provide stability to the DNA double helix structure.

Glycosidic Bond in DNA:
- The glycosidic bond is a covalent bond that joins the sugar molecule (deoxyribose) to the nitrogenous base in DNA.
- In DNA, the glycosidic bond is formed between the carbon atom of the deoxyribose sugar and the nitrogen atom of the nitrogenous base.
- The glycosidic bond connects the sugar-phosphate backbone of one DNA strand to the nitrogenous base, forming a nucleoside.

Phosphodiester Bond in DNA:
- The phosphodiester bond is a covalent bond that connects the sugar molecules (deoxyribose) of adjacent nucleotides in DNA.
- It forms between the 3' carbon of one deoxyribose and the 5' carbon of the adjacent deoxyribose.
- The phosphodiester bond links the nucleotides in a linear manner, forming the sugar-phosphate backbone of the DNA molecule.

Phosphoester Bond in DNA:
- The phosphoester bond is a covalent bond that connects the phosphate group to the sugar molecule (deoxyribose) in DNA.
- In DNA, the phosphoester bond is formed between the phosphate group and the 5' carbon of the deoxyribose.
- The phosphoester bonds are responsible for linking the sugar-phosphate backbone of the DNA strands, providing structural stability to the molecule.

Summary:
- DNA contains hydrogen bonds, glycosidic bonds, phosphodiester bonds, and phosphoester bonds.
- Hydrogen bonds form between nitrogenous bases, providing stability to the DNA double helix.
- Glycosidic bonds connect the sugar molecule to the nitrogenous base in DNA.
- Phosphodiester bonds link the sugar molecules of adjacent nucleotides, forming the DNA backbone.
- Phosphoester bonds connect the phosphate group to the sugar molecule, contributing to the structural integrity of DNA.