Which DNA nitrogenous bases pair with each other which bases are purines and which are pyrimidines?

A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T)

Why do we need to have four types of nitrogenous bases?

A set of five nitrogenous bases is used in the construction of nucleotides, which in turn build up the nucleic acids like DNA and RNA. These bases are crucially important because the sequencing of them in DNA and RNA is the way information is stored.

What is the similarities between thymine and uracil?

Both chemical structures of uracil and thymine are very similar. They only differ by the presence of a methyl group in C-5 of thymine. Uracil only occurs in RNA while thymine only occurs in DNA.

Which nitrogen bases are purines?

Nitrogenous bases present in the DNA can be grouped into two categories: purines (Adenine (A) and Guanine (G)), and pyrimidine (Cytosine (C) and Thymine (T)). These nitrogenous bases are attached to C1′ of deoxyribose through a glycosidic bond.

What are the similarities between purine and pyrimidine?

Both purines and pyrimidines are similar to the organic structure pyridine, however, the purines contain one hexose and one pentose ring while the pyrimidine contains a single hexo-cyclic ring. Purines and pyrimidines both are made up of the aromatic ring having carbon and nitrogen in it.

What are the 4 nitrogen bases that make up DNA?

Attached to each sugar is one of four bases–adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.

What is difference between uracil and uridine?

As nouns the difference between uracil and uridine is that uracil is (organic compound) one of the bases of rna it pairs with adenine and is symbolised by u while uridine is (organic compound|biochemistry) a nucleoside formed from uracil and ribose.