What are the four kinds of nitrogen bases in DNA?
Nitrogen Bases of DNA – These are rather complex single or double ring structures containing nitrogen and are attached to the carbon of the sugar. Nitrogen bases are of two types based on the number of rings. Purines Purines are double ringed nitrogenous bases which are linked to sugar by using nitrogen present at 9′ -position. Adenine and guanine come under this group. Pyrimidines Pyrimidines are single ringed nitrogen bases which are linked to sugar by using nitrogen present at 1 ‘ -position. Thymine and cytosine come under this group. Adenine 6-aminopurine Guanine 2-amino 6-oxypurine Cytosine 4-amino 2-oxypyrimidine Thymine 2,4-oxy S-methyl pyrimidine DNA stands for deoxyribonucleic acid. Strands of DNA are long polymers built of millions of nucleotides that are linked together. Individually, nucleotides are quite simple, consisting of three distinct parts: One of four nitrogen bases Deoxyribose (a five-carbon sugar) A phosphate group The image below shows a simplified representatio
