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The main chemical structure difference in purines and pyrimidines is purines have a 5 sided C and N based ring as well as a 6 sided C and N based ring structure. Pyrimidines only have the 6 sided C and N based ring structure, also uracil(unmethylated) replaces thymine(methylated) as a pyrimidine in RNA.

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Which one is purines and pyrimidines are bigger?

Purines because purines have two rings where as pyrimidines have only one ring.


How are pyrimidines different from the purines?

Pyrimidines (cytosine, thymine, uracil) have a single-ring structure, while purines (adenine, guanine) have a double-ring structure. Purines always pair with pyrimidines in DNA and RNA bases. Additionally, purines are larger molecules compared to pyrimidines.


How do purines differ from pyrimidines?

Purines and pyrimidines are the building blocks of nucleic acids. The difference between purines and pyrimidines is in the number of carbon-rings present. Pyrimidines contain one carbon-ring while purines have two.


How is Presence of purines and pyrimidines in DNA found?

Adenine and Guanine are purines, and Thymine and Cytosine are pyrimidines.


What do purines bond to?

Purines bond to pyrimidines in nucleic acid DNA .


What are the two classes of nitrogen bases?

The two classes of nitrogen bases are purines and pyrimidines. Purines include adenine and guanine, which have a double-ring structure, while pyrimidines include cytosine, thymine, and uracil, which have a single-ring structure.


Which nucleotide are purines and which are pyrimidine?

Thymine and Cytosine are the pyrimidine nucleotides of DNA, while Adenine and Guanine are the purine structures.


Purines and pyrimidines are?

Purines and pyrimidines are nitrogen bases found in DNA and RNA .They are nitrogen containing heterocyclic compounds .Purines are large double ringed while pyrimidines are small single ringed .


Do purines bond with pyrimidines in Dna?

Adenine and guanine, being purines ( double ringed ) always bond with thymine and cytosine, single ringed pyrimidines.


How many purines and pyrimidines are present in the DNA molecule?

There are two purines (adenine and guanine) and two pyrimidines (cytosine and thymine) present in the DNA molecule.


What and what are two classes of nitrogenous bases?

The two classes of nitrogenous bases are purines and pyrimidines. Purines include adenine and guanine, while pyrimidines include cytosine, thymine, and uracil.


What is the difference between a purines and pyrimidines?

A purine has a double ring, while a pyrimidine has a single ring. Also purines are adenine and guanine, and the pyrimidines are thymine and cytosine.