In DNA two types of nitrogenous base are formed :- theses are -(1) purine – is a double ring structure present in the form of adnine and guanine. (2) pyrimidine – is a single structure present in the form of cytosine and thymine.
There are 4 types of nitrogenous base (i) Adenine(ii) Guanine(iii) cytosine(iv) Thymine
Nitrogen bases are classified into two types-
1)Purines–eg guanine, adenine
2)Pyrimidines–eg cytosine, uracil , thymine
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purines and pyrimidines
purines- adenine and guanine
pyrimidines- cytosine , uracil(in RNA only ) and thymine.
therefore 4 types.
^_^
adenine paired with thymine
guanine paired with cytosine
There are 4 Nitrogenous bases present in the DNA :-
Adenine,Guanine,Thymine and Cytosine.
Adenine and Guanine are classified as Purines while Thymine and Cytosine are classified as Pyrimidines.
Basically there are four nitrogenous bases in the DNA which is Adenine, thymine , cytosine and guanine .
Purines- adenine and guanine
Pyrimidines- cytosine,thymine.
A-T
G-c
There are four different nitrogenous bases are present, from which two have double ring and two have single ring structure. these bases are adenine , guanine, cytosine and thymine .
