It depends on the context. In a biological context, pyrimidines are the nucleotides with a single ring in the nitrogenous base. These include thymine and cytosine in DNA and uracil and cytosine in RNA.
In an organic chemistry context, the answer is longer.
Cytosine and thymine are the pyrimidine bases in DNA.
when a purine base only pairs with a pyrimidine
Thymine and cytosine are the pyrimidine bases of DNA. Uracil is the pyrimidine base which replaces thymine in RNA.
uracil
it would look like O-S-O and would be a polar-covalent bond and bent in structure
A single-ring structure
antiparallel
James D. Watson discovered the pattern structure of DNA with Francis Crick. A purine and a pyrimidine
An anilinopyrimidine is any of a class of fungicides whose structure is based on a pyrimidine ring with an aniline substituent.
a rod like structure
It's not a strand that is replaced, but a nitrogen base, much like adenine. The pyrimidine thymine is replaced by another pyrimidine uracil.
Cytosine and thymine are the pyrimidine bases in DNA.
nothing
when a purine base only pairs with a pyrimidine
in this a purine base is substitued in place or pyrimidine and a pyrimidine is substitued in place of purine
its like endi stycuai its like endi stycuai
ch3-ch2 +