The amino and inimo forms are the two tautomers of cytosine. The differ due to resonsnce around the double bond between C1 and N in the ring and C1 and N in the side chain.
The amino and inimo forms are the two tautomers of cytosine. The differ due to resonsnce around the double bond between C1 and N in the ring and C1 and N in the side chain.
A nucleotide consists of three parts: * A Sugar (Deoxyribose) * A Phosphate Group * A Nitrogen-containing base Base Pairing Rules A&T (Adenine&Thymine) C&G (Cytosine&Guanine)
The two Purines are: Adenine and Guanine (A and G) The two Pyrimidines are: Cytosine and Thymine (C and T)
Adenine and guanine are the two purines in the DNA and thymine and cytosine are two pyrimidines.
In DNA Guanine always pairs with Cytosine (C) cytosine (C) guanine (G) thymine (T) adenine (A)
The two bases that are present in equal amounts in a double stranded DNA molecule are cytosine and guanine. Cytosine pairs with guanine in A DNA molecule.
tautomeci form
cytosine (C).
cytosine and guanine
Guanine. It forms a triple hydrogen bond with Cytosine.
A nucleotide consists of three parts: * A Sugar (Deoxyribose) * A Phosphate Group * A Nitrogen-containing base Base Pairing Rules A&T (Adenine&Thymine) C&G (Cytosine&Guanine)
thymine and cytosine
Tautomeric isomerism shows the shifting of a proton. This occurs when a compound can rapidly interconvert between two forms by moving a proton. For example, the keto-enol tautomeric isomerism of cyclohexane-1,3-dione, which can exist as both a keto form and an enol form by interchanging the positions of the hydrogen atom and the double bond.
Cytosine should not ever pair with thymine, for two major reasons: Cytosine and thymine are both pyrimidines, meaning they contain a single sugar, whereas adenine and guanine are purine and contain a two-ringed sugar. If cytosine were to pair with thymine (or another cytosine) it would throw off the shape of the DNA double helix. Cytosine wants to form three hydrogen bonds, and thymine can only form two. Thus, under normal circumstances, cytosine will never be paired with thymine.
Usually cytosine although other combinations, infrequently seen, are possible.
The two Purines are: Adenine and Guanine (A and G) The two Pyrimidines are: Cytosine and Thymine (C and T)
A (adenine), T (thymine), C (cytosine), and G (guanine). A, T, G, C. But there are five. U is the other one. It's found in RNA, not DNA, and is probably not one of the four you're after.
Thymine and Cytosine :)