pyrimidine: Definition from Answers.com
pyrimidine n. A single-ringed, crystalline organic base, C 4 H 4 N 2 , that forms
uracil, cytosine, or thymine and is the parent compound of many.
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What are the pyrimidines and the purines
The rungs of the ladder are pairs of 4 types of nitrogen bases. Two of the bases
are purines - adenine and guanine. The pyrimidines are thymine and cytosine.
wiki.answers.com/Q/ What_are_the_pyrimidines_and_the_purines

What are pyrimidines
Pyrimidines are single ringed aromatic structures that make up 3 of the basic
building blocks of ribonucleic acid (RNA) and deoxyribonucleic acid (DNA).
wiki.answers.com/Q/What_are_pyrimidines

What is the difference between a purine from a pyrimidine
the difference it that purine is a nitrogenous base that has a double-ring structuer
and pyrimidines is a nitrogenous base that has a single-string structure cnbwm ...
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What are the two bases that are pyrimidines
One of two pyrimidines used as a nitrogen base in nucleotides? cytosine and
guanine. What two things belong to the nitrogenous bases called pyrimidines?
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What is an example of pyrimidine
A http://www.answers.com/topic/heterocyclic organic compound (1) containing
nitrogen atoms at positions 1 and 3. Naturally occurring derivatives of the parent ...
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What have pyrimidines
The rungs of the ladder are pairs of 4 types of nitrogen bases. Two of the bases
are purines - adenine and guanine. The pyrimidines are thymine and cytosine.
wiki.answers.com/Q/What_have_pyrimidines

What are the purine bases and pyrimidine bases
Improve. They are the nitrogen bases that are attached to RNA and DNA. In DNA,
adenine and guanine are purines and thymine and cytosine are pyrimidines.
wiki.answers.com/Q/ What_are_the_purine_bases_and_pyrimidine_bases

Which nucleotides are pyrimidines
Pyrimidines are single ringed aromatic structures that make up 3 of the basic
building blocks of ribonucleic acid (RNA) and deoxyribonucleic acid (DNA).
wiki.answers.com/Q/Which_nucleotides_are_pyrimidines