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In the case of adenine bonding to thymine, the NH group of the thymine bonds with the N of the adenine, and the double-bonded oxygen on the thymine bonds with the NH2 group on the adenine.
(thymine)N - H - N(adenine) and (thymine)=O - H - NH(adenine)
In the case of guanine bonding to cytosine, the double-bonded O group of the cytosine bonds with the NH2 of the guanine, the N on the cytosine bonds with the NH group on the guanine, finally, the NH2 on the cytosine bonds with the double-bonded O on the guanine.
(cytosine)=O - H - NH(guanine) and (cytosine)N - H - N(guanine) finally (cytosine)NH - H - O=(guanine)
In summary, there are two H bonds between an adenine and a thymine. There are three H bonds between a cytosine and guanine.
Wiki User
∙ 13y ago
Wiki User
∙ 10y agoHydrogen bonds occur between the purines and pyrimidines of nucleic acids.
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What bond holds purine bases and pyrimidine bases together?
ATGACGT
When purine base only pairs with a pyrimidine?
when a purine base only pairs with a pyrimidine
Does Complementary base pairing always pairs a purine with a pyrimidine?
Yes. Adenine+Guanine, or Cytosine+Thymine; each is a pyrimidine/purine pair.
Why do the purine and pyrimidine bases always pair together?
It has to do with the size of each molecule. One is large (double ring) and the other is small (single ring). By having them pair with each other, the spacing along the length of DNA or RNA is kept uniform.
When a purine base only pairs with a pyrimidine what is it called?
I dont know what its called nuka..
What bond holds purine bases and pyrimidine bases together?
ATGACGT
When purine base only pairs with a pyrimidine?
when a purine base only pairs with a pyrimidine
What is transversion mutation?
in this a purine base is substitued in place or pyrimidine and a pyrimidine is substitued in place of purine
What are a purine and a pyrimidine that are capable of hydrogen bonding to form the rung structure of DNA called?
antiparallel
How are four bases paired in a molecule DNA?
Adenine(purine)=========thymine(pyrimidine)Guanine(purine)----------------cytosine(pyrimidine)
Is nitrogen a base?
A basic compound that contains nitrogen, such as a purine or pyrimidine. A basic compound that contains nitrogen, such as a purine or pyrimidine.
Does Complementary base pairing always pairs a purine with a pyrimidine?
Yes. Adenine+Guanine, or Cytosine+Thymine; each is a pyrimidine/purine pair.
Where a purine base only pairs with a pyrimidine?
nitrogen
How do you recognize a purine?
By the fused imidazole and pyrimidine rings.
Does the last nucleotide in a codon have less specificity than the others and if so why?
Yes, this is true (generally speaking). In many cases there are two different codons that differ at the third position yet code the same amino acid. I hypothesize that the reason that this is so is that nature has naturally selected the codons to be resistant to certain transition and transversion mutations. transition mutation = purine to purine or pyrimidine to pyrimidine transversion mutation = purine to pyrimidine or pyrimidine to purine
What are the four components of a double helix?
Since the 4 bases are composed of 2 purines (adenine and guanine) and 2 pyrimidines (cytosine and thymine), 1 purine is bonded to 1 pyrimidine (e.g. guanine-cytosine; adenine-thymine). And the bond or linkage between this purine and pyrimidine is because of HYDROGEN BONDING.
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.
