phosphodiester bonds join the nitrogenous bases in dna.
what type of bond joins the nitrogenous bases in dna?
phosphodiester bonds
in the biological sciences, nitrogenous bases are increasingly termed nucleobases because of their role in nucleic acids - their flat shape is particularly important when considering their roles as the building blocks of dna and rna. a set of five nitrogenous bases is used in the construction of nucleotides, which in turn build up nucleic acids like dna and rna. these nitrogenous bases are adenine (a), uracil (u), guanine (g), thymine (t), and cytosine (c). thymine and uracil are distinguished by merely the presence or absence of a methyl group on the fifth carbon (c5) of these heterocyclic six-membered rings. the nitrogenous bases form hydrogen bonds between opposing dna strands to form the rungs of the "twisted ladder" or double helix of dna or a biological catalyst that is found in the nucleotides. adenine is always paired with thymine, and guanine is always paired with cytosine. these are known as base pairs. adenine forms two hydrogen bonds with thymine in dna and two hydrogen bonds with uracil in rna, while three hydrogen bonds are formed between guanine and cytosine. there are a variety of other non-canonical base pairs that occur in nature due to the versatility of these molecular structures. uracil is only present in rna, replacing thymine. pyrimidines include thymine, cytosine, and uracil. they have a single ring structure. purines include adenine and guanine. they have a double ring structure.
nitrogenous base
dna encodes the genetic information required for an organism to carry out its life cycle. in effect, dna serves as the "hard drive" which stores genetic data. dna is replicated and serves as its own template for replication.









































dna forms a double helix structure and is a composed of a sugar-phosphate backbone and nitrogenous bases; this can be thought of as a ladder structure where the sides of the ladder are constructed of deoxyribose sugar and phosphate while the rungs of the ladder are composed of paired nitrogenous bases. there are four bases in a dna molecule:
chimeric rna