which base replaces thymine
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Why uracil replaced thymine in rna? Uracil is one of the constituent bases of RNA. It replaces thymine  in RNA because it requires less energy to produce.
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Why does RNA have uracil and DNA has thymine? I presume that the RNA nucleotide containing uracil as its nitrogenous base is more stable than the RNA nucleotide containing thymine. This must be vice versa with DNA. RNA or DNA nucleotides containing either thymine or uracil are all complementary to DNA or RNA nucleotides containing Adenine. It is therefore all to do with probability of occurence of the more stable form, and of inclusion in the polynucleotide that is subsequently created. duncrhodes · 10 years ago.
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Structural Biochemistry/Nucleic Acid/Nitrogenous Bases/Pyrimidines/Uracil Properties [edit]. Uracil is found in RNA and binds to adenine via 2 hydrogen bonds, but is replaced by thymine in DNA. Methylation of Uracil produces thymine. Uracil can pair with any of the base pairs depending on arrangement.
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Thymine Thymine /ˈθaɪmᵻn/ (T, Thy) is one of the four nucleobases in the nucleic acid of DNA that are represented by the letters G–C–A–T. The others are adenine, guanine, and cytosine. Thymine is also known as 5-methyluracil, a pyrimidine nucleobase. In RNA, thymine is replaced by the nucleobase uracil. Thymine was first isolated (from calves' thymus glands) in 1893 by Albrecht Kossel and Albert Neumann.
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RNA The first three are the same as those found in DNA, but in RNA thymine is replaced by uracil as the base complementary to adenine. This base is also a pyrimidine and is very similar to thymine.Uracil is energetically less expensive to produce than thymine, which may account for its use in RNA.In DNA, however, uracil is readily produced by chemical degradation of cytosine, so having thymine as the normal base makes detection and repair of such incipient mutations more efficient.he first three are the same as those found in DNA, but in RNA thymine is replaced by uracil as the base complementary to adenine. This base is also a pyrimidine and is very similar to thymine.
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- The pyrimidine nitrogenous bases are: thymine (which bonds with two hydrogen bonds to adenine) and cytosine (which bonds with guanine through three hydrogen bonds.     In RNA uracil replaces thymine and there are no hydrogen bonds between the nitrogenous bases as RNA is a single stranded molecule.
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Molecular Biology of the Cell We all know from high school bio that thymine takes the place of uracil in DNA. But why exactly does this occur? What advantage does thymine offer over uracil? When I asked a teacher about this, she replied: Thymine is a more stable molecule than uracil, and thus helps maintain the integrity of DNA. However, the only difference between these two bases is a single methyl group:
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- The nitrogenous bases of DNA are adenine (A), guanine (G), cytosine (C) and thymine (T). RNA also has the bases A, G and C-but has uracil (U) instead of T. 7 people found this useful. Edit. Share to: 1  Diagrams Showing the Process of DNA-to-RNA Transcription DNA is often referred to as the blueprint for life.nswer by Pieman3113. Confidence votes 4. The DNA bases are adenine, guanine, thymine, and cytosine. In RNA, Thymine is replaced by Uracil. Adenine and guanine are known as purines and cytosine and thymine are known as pyrimidines.
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Question: Why does DNA contain thymine as a pairing base with adenine, but in the transcription, RNA contai... Show transcribed image text Why does DNA contain thymine as a pairing base with adenine, but in the transcription, RNA contains uracil instead of thymine? The only difference between thymine and uracil is a methyl group-thymine has it, uracil doesn't.
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Thymidine Thymidine (deoxythymidine; other names deoxyribosylthymine, thymine deoxyriboside) is a pyrimidine deoxynucleoside. Deoxythymidine is the DNA nucleoside T, which pairs with deoxyadenosine (A) in double-stranded DNA.In cell biology it is used to synchronize the cells in S phase.Before the boom in thymidine use caused by the need for thymidine for the production of the antiretroviral drug azidothymidine (AZT), much of the world's thymidine production came from herring sperm.eoxythymidine is non-toxic and as part of one of the four nucleotides in DNA it is a naturally occurring compound that exists in all living organisms and DNA viruses. RNA has uridine (uracil joined to ribose) instead. Uracil is chemically very similar to thymine, the latter being 5-methyluracil.
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Complementarity (molecular biology) Complementarity is achieved by distinct interactions between nucleobases: adenine, thymine (uracil in RNA), guanine and cytosine. Adenine and guanine are purines, while thymine, cytosine and uracil are pyrimidines. Purines are larger than pyrimidines.
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Thymine In RNA, thymine is replaced with uracil in most cases. In DNA, thymine (T) binds to adenine (A) via two hydrogen bonds, thereby stabilizing the nucleic acid structures. Thymine combined with deoxyribose creates the nucleoside deoxythymidine, which is synonymous with the term thymidine.
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DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing Professor Pear: Oh, yes. The chemistry of the nitrogenous bases is really the key to the function of DNA. It allows something called complementary base pairing. You see, cytosine can form three hydrogen bonds with guanine, and adenine can form two hydrogen bonds with thymine. Or, more simply, C bonds with G and A bonds with T.
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Why does RNA have uracil and DNA has thymine? Best Answer: I think it's because DNA needs thymine to replicate and produce daughter strands, and also protects the DNA from attack and manipulation. However RNA does not need this as it is not a part of a genomic building block ie/ all organisms are made up of DNA, so it uses uracil.
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DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing The bases can be categorized into two different groups. The single-ring nitrogenous bases, thymine and cytosine, are called pyrimidines, and the double-ring bases, adenine and guanine, are called purines. (Miss Crimson has a puzzled look. ) I guess you might wonder how I can remember that, but it's really quite simple.
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- Pair rules also nitrogenous bases are: Adenine pairs with thymine Guanine pairs with cytosine Thymine pairs with adenine Cytosine pairs with guanine In case you are wonderin … g when transcription occurs the top of the deoxyribose double-helix backbone can have thymine.
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Why is thymine in DNA and uracil in RNA? Therefore it is believed that actually thymine is a “protected” form of uracil in DNA, that is simply methylated and does not get cut out. This enzyme does not do the same to RNA, so there was apparently no need for uracil to be replaced by thymine in the RNA.
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What replaces thymine in RNA? Uracil replaces Thymine in DNA. Adenine and Thymine go together while Cytosine and Guanine go with each other in DNA. But, in RNA, Thymine is replaces with Uracil. So no…t Adenine and Uracil go together, while Cytosine and Guanine pair up.
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DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing Each nucleotide base can hydrogen-bond with a specific partner base in a process known as complementary base pairing: Cytosine forms three hydrogen bonds with guanine, and adenine forms two hydrogen bonds with thymine. These hydrogen-bonded nitrogenous bases are often referred to as base pairs.
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Uracil In RNA, uracil base-pairs with adenine and replaces thymine during DNA transcription. Methylation of uracil produces thymine. In DNA, the evolutionary substitution of thymine for uracil may have increased DNA stability and improved the efficiency of DNA replication.racil pairs with adenine through hydrogen bonding. When base pairing with adenine, uracil acts as both a hydrogen bond acceptor and a hydrogen bond donor. In RNA, uracil binds with a ribose sugar to form the ribonucleoside uridine. When a phosphate attaches to uridine, uridine 5'-monophosphate is produced.
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- Cytosine is always coupled with Guanine. (I like to remember that the round letters stick together).    In DNA, Thymine is coupled with Adenine, but in RNA, Thymine is …replaced by Uracil.   Therefore, in RNA, U and A go together, always.
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An Introduction to Molecular Biology/DNA the unit of life In DNA, the purine bases are adenine and guanine, while the pyrimidines are thymine and cytosine. RNA uses uracil in place of thymine. Adenine always pairs with thymine by 2 hydrogen bonds, while guanine pairs with cytosine through 3 hydrogen bonds, in each case because of the unique structures of the bases.
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Difference Between Thymine and Uracil It is always paired with adenine by two hydrogen bonds. Thymine is a pyrimidine that is found only in DNA molecules and is synthesized from uracil. Uracil is a pyrimidine type nitrogenous base that is found only in RNA molecules. It always pairs with adenine. Chemical difference of uracil and thymine is very small. Uracil has a hydrogen atom at C-5 carbon while thymine has a methyl group at the same carbon.
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Why is uracil found only in RNA? RNA is a polymer with a ribose and phosphate backbone and four different bases: adenine, guanine, cytosine, and uracil. The first three are the same as those found in DNA, but in RNA thymine is replaced by uracil as the base complementary to adenine. This base is also a pyrimidine and is very similar to thymine. Uracil is energetically less expensive to produce than thymine, which may account for its use in RNA. In DNA, however, uracil is readily produced by chemical degradation of cytosine, so having thymine as the normal base makes detection and repair of such incipient mutations more efficient.
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Which RNA base pairs with the adenine in DNA? A. thymine B. guanine C. cytosine D. uracil In the DNA, base complements are A-T (adenine - thymine) and G-C (guanine - cytosine). In the RNA, base complements are A-U (adenine - uracil) and G-C (guanine - cytosine). Hence, only DNA contains thymine, while in RNA uracil is present instead of thymine. Comments.
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What Is the Nitrogenous Base Found in DNA but Not in RNA? Thymine is a nitrogenous base that is found in DNA molecules but not in RNA molecules, according to Vision Learning. Instead of thymine, RNA molecules utilize uracil.... Thymine is a nitrogenous base that is found in DNA molecules but not in RNA molecules, according to Vision Learning.