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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.
What else can I help you with?
Does Complementary base pairing always pairs a purine with a pyrimidine?
Yes, complementary base pairing in DNA always pairs a purine (adenine or guanine) with a pyrimidine (thymine or cytosine). This specific pairing allows for the formation of hydrogen bonds between the bases, ensuring stability in the DNA double helix structure.
What bond holds purine bases and pyrimidine bases together?
Hydrogen bonds hold purine bases (adenine and guanine) and pyrimidine bases (cytosine, thymine, and uracil) together in DNA and RNA molecules. These hydrogen bonds form between specific pairs of bases, with adenine always pairing with thymine (or uracil in RNA) and guanine always pairing with cytosine.
When purine base only pairs with a pyrimidine?
This is a basic principle of DNA base pairing called Chargaff's rule. Adenine (purine) pairs with thymine (pyrimidine), while guanine (purine) pairs with cytosine (pyrimidine). This complementary base pairing is essential for the double-stranded structure of DNA.
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?
When a purine base pairs with a pyrimidine, it forms a complementary base pair. This pairing is important in the structure of DNA molecules, where adenine pairs with thymine and guanine pairs with cytosine through hydrogen bonding, creating the double helix structure of DNA.
What are a purine and a pyrimidine that are capable of hydrogen bonding to form the rung structure of DNA called?
Adenine (purine) can hydrogen bond with thymine (pyrimidine), and guanine (purine) can hydrogen bond with cytosine (pyrimidine) to form the rungs of the DNA double helix structure.
Does Complementary base pairing always pairs a purine with a pyrimidine?
Yes, complementary base pairing in DNA always pairs a purine (adenine or guanine) with a pyrimidine (thymine or cytosine). This specific pairing allows for the formation of hydrogen bonds between the bases, ensuring stability in the DNA double helix structure.
How are four bases paired in a molecule DNA?
Adenine(purine)=========thymine(pyrimidine)Guanine(purine)----------------cytosine(pyrimidine)
What bond holds purine bases and pyrimidine bases together?
Hydrogen bonds hold purine bases (adenine and guanine) and pyrimidine bases (cytosine, thymine, and uracil) together in DNA and RNA molecules. These hydrogen bonds form between specific pairs of bases, with adenine always pairing with thymine (or uracil in RNA) and guanine always pairing with cytosine.
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.
When purine base only pairs with a pyrimidine?
This is a basic principle of DNA base pairing called Chargaff's rule. Adenine (purine) pairs with thymine (pyrimidine), while guanine (purine) pairs with cytosine (pyrimidine). This complementary base pairing is essential for the double-stranded structure of DNA.
How do you recognize a purine?
By the fused imidazole and pyrimidine rings.
Where a purine base only pairs with a pyrimidine?
nitrogen
Purine nucleotides mainly differ from pyrimidine nucleotides in their number of?
Purine nucleotides differ from pyrimidine nucleotides in their structure due to the number of nitrogen-containing rings they have. Purine nucleotides have a double-ring structure, while pyrimidine nucleotides have a single-ring structure.
Will a purine base bond with another purine?
no.because there is not enough space to bind two purine bases.
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 is transversion mutation?
A transversion mutation is a type of point mutation where a purine base is substituted for a pyrimidine, or vice versa. This type of mutation results in a change in the base pair from a double-ring structure to a single-ring structure, potentially causing changes in the amino acid sequence during protein synthesis.
