Both uridine and uracil are essential components of RNA. Les. Uracil: Definition & Structure. Purines are larger than pyrimidines because they have a two-ring structure while pyrimidines only have a single ring. Although this enzyme has evolved to remove uracil from. Learn the function of uracil, as well as its properties. Fred. Related Products. Biochemistry a pyrimidine base, C 4 H 4 N 2 O 2, that is one of the fundamental components of RNA, in which it forms base pairs with adenine. Understand the definition and structure of the compound uracil. Transcription uses one of the two exposed DNA. Biology definition: A thymine is a pyrimidine nucleobase that, as a constituent of DNA, plays a crucial role in genetic information storage and transfer. It pairs with adenine and is symbolised by U. Forums. It has only one phosphate group attached to the. In RNA, uracil binds to. Thymine is an organic aromatic. see more. Base-pairing Rules Definition. US English. . In DNA, guanine is paired with cytosine. Here are 4 tips that should help you perfect your pronunciation of 'uracil': Break 'uracil' down into sounds: [YOOR] + [UH] + [SIL] - say it out loud and exaggerate the sounds until you can consistently produce them. Definition. RNA consists of ribose nucleotides (nitrogenous bases appended to a ribose sugar) attached by phosphodiester bonds, forming strands of varying lengths. A. | 意思、发音、翻译及示例RNA is a molecule that has a slightly different structure than DNA: RNA is single-stranded (as opposed to the double-stranded DNA), and contains the nitrogenous base uracil rather than thymine. Video shows what uracil means. A nucleic acid is a biopolymer composed of monomeric units of nucleotides. Related to this Question. In RNA, uracil pairs with adenine. Synonyms. US English. have an additional oxygen atom, and the base thymine. W. Adenine (not adenosine) 2. In DNA, guanine is paired with cytosine. RNA is produced as needed in response to the dynamic cellular environment and the. Pseudouridine (abbreviated by the Greek letter psi- Ψ) [1] is an isomer of the nucleoside uridine in which the uracil is attached via a carbon-carbon instead of a nitrogen-carbon glycosidic bond . Our Apps are nice too! Dictionary. enzyme involved in DNA replication that joins individual nucleotides to produce a DNA molecule. A nucleotide is the basic building block of nucleic acids (RNA and DNA). The five bases are adenine, guanine, cytosine, thymine, and uracil, which have the symbols A, G, C, T, and U, respectively. Zira. Originally discovered in 1900, it was isolated by hydrolysis of yeast nuclein that was found in bovine thymus and spleen, herring sperm, and wheat germ. Hydrogen bonds form between adenine and uracil, guanine and cytosine, and also guanine and uracil. Uracil is only present in RNA molecules, while thymine is only present in. Pyrimidine, any of a class of organic compounds of the heterocyclic series characterized by a ring structure composed of four carbon atoms and two nitrogen atoms. Look through examples of uracil translation in sentences, listen to pronunciation and learn grammar. In this paper we will review: (i) sources of the origin of uracil in DNA; (ii) some properties of the enzymes responsible for the excision of uracil and their role in the Ig diversification process, which comprises. DNA, organic chemical of complex molecular structure found in all prokaryotic and eukaryotic cells. Pyrimidines are stabilized by resonance among atoms in the ring, which gives most of the bonds a partial double bond character. Uracil-DNA glycosylase (UDG) is a highly conserved repair enzyme that catalyzes the excision of uracil from uracil-containing single- and double-stranded DNA 1,2,3,4,5,6,7. e. a speech counterpart of orthographic u. Transcription is performed by enzymes called RNA polymerases, which link nucleotides to form an RNA strand (using a DNA strand as a template). Hypernym: pirimidina. English Odia Dictionary. uracil - Meaning in English, what is the meaning of uracil in English dictionary, pronunciation, synonyms, usage examples and definitions of uracil in English and English. 2. A Dictionary of Nursing. Definición Español: Nucleótido de uracilo que contiene un grupo pirofosfato esterificado al C5 de la molécula de azúcar. 11. Molecular Formula. They are found in all organisms – eukaryotic and prokaryotic. However, there are three main differences between DNA and RNA: RNA uses the sugar ribose instead of deoxyribose. Background Detection of somatic mutations is a mandatory practice for therapeutic definition in precision oncology. This is accomplished by the process of DNA replication. Symbol: U. Definition and meaning were removed to avoid copyright violation, but you can find them h. Understand the definition and structure of the compound uracil. uracil is the translation of "Uracil" into English. Define uracil. New. Transcription and translation are the two processes that convert a sequence of nucleotides from DNA into a sequence of amino acids to build the desired protein. from . Pyrimidine is a metabolite found in or produced by Escherichia coli (strain K12, MG1655). adenine: [noun] a purine base C5H5N5 that codes hereditary information in the genetic code in DNA and RNA — compare cytosine, guanine, thymine, uracil. As a cream it is used for actinic keratosis, basal cell. It has a role as a Daphnia magna metabolite. Understand the definition and structure of the compound uracil. Noun [ edit] English Wikipedia has an article on: directionality (molecular biology) § 3′ end. In RNA, the base thymine (T) is replaced by the base uracil (___). How to pronounce, definition by. (b) RNA contains the pyrimidine uracil in place of thymine found in DNA. Uracil has a melting point of 335 °C. Definition of thymine noun in Oxford Advanced Learner's Dictionary. US English. Here are 4 tips that should help you perfect your pronunciation of 'uracil': Break 'uracil' down into sounds : [YOOR] + [UH] + [SIL] - say it out loud and exaggerate the sounds until you can consistently produce them. Definition:. uracil. Uracil is a demethylated form of thymine, and replaces thymine in RNA. One of the main functions of RNA is for protein synthesis. A nucleotide is a nucleoside with one or more phosphate groups. Powered by MaryTTS. 2. Uracil (U): Uracil is a weak acid with the chemical compound C 4 H 4 N 2 O 2. Li and Sancar provided a comprehensive overview on. Also known as 5-methyluracil, thymine (T) is a pyrimidine nucleobase, which pairs with adenine (A), a purine nucleobase. The region of opened-up DNA is called a transcription bubble. A nitrogenous base that is found in RNA, replacing the thymine of DNA. from . US English. The nitrogenous bases can be divided into two categories: purines and pyrimidines. 4K . Games. The audio signal is displayed to help you "see" how the pronunciation audio looks like. As a nitrogenous base, cytosine is full of nitrogen atoms (it has three). Nucleotide (biology definition): the fundamental building block of nucleic acid; an organic compound made up of a nitrogenous base, a sugar, and a phosphate group. DNA ligase. A uracil-based nucleotide is called uridine. Description. A) Cytidine is deaminated to uracil so it would be difficult for any repair mechanism to differentiate between uracil that belongs in the sequence and uracil that resulted. [2]uracil: [ u´rah-sil ] a pyrimidine base found in ribonucleic acid (RNA). Uracil is planar and unsaturated and has the ability to absorb light. two strands of nucleotides wound about each other; structure of DNA. 1 10. [2] After transcription and following synthesis, RNA can be modified with over. (A) Watson-Crick base pairing between adenine and thymine (i. During DNA replication, uracil will pair with adenine rather than guanine (as it would if the base was still cytosine), so an uncorrected cytosine-to. C. Translation. This base pairing is necessary for the stability and folding of RNA molecules, and recognition of RNA sequences. Each nucleotide subunit is composed of a pentose sugar (deoxyribose), a nitrogenous base, and a phosphate group. Uracil-ftorafur is a combination of tegafur, an oral prodrug of fluorouracil, and uracil in a 1:4 molar ratio. . Examples of how to use “uracil” in a sentence from Cambridge Dictionary. Symbol. Thymine was first isolated in 1893 by. Uracil has a melting point of 335 °C. DNA and RNA are very similar. Coordinate terms: citosina, timina. A pyrimidine is an organic compound known as an aromatic heterocyclic compound and has the molecular formula of C 4 H 4 N 2. Etymology: “ nucleo “- (“nucleus”) + – ide (chemical suffix). uracil noun. They were first described by Dr. There are two types of nucleic acids in biology: DNA and RNA. Definition. RNA pairing is A,U Adenine and Uracil , Guanine Cytosine. Nucleic acids, macromolecules made out of units called nucleotides, come in two naturally occurring varieties: deoxyribonucleic acid ( DNA) and ribonucleic acid ( RNA ). In DNA, the uracil nucleobase is replaced by thymine (T). Definition guanine: [noun] a purine base C5H5N5O that codes genetic information in the polynucleotide chain of DNA or RNA — compare adenine, cytosine, thymine, uracil. Uracil is represented by the letter U in RNA and is a pyrimidine. from . The bases used in DNA are adenine (A), cytosine (C), guanine (G) and thymine (T). unselfish d. See full answer below. Here are 4 tips that should help you perfect your pronunciation of 'uracil': Break 'uracil' down into sounds : [YOOR] + [UH] + [SIL] - say it out loud and exaggerate the sounds until you can consistently produce them. 00:00. Instead of uracil, DNA has thymine that pairs. The hetero cyclic aromatic structure of the uracil is characterized by the keto groups at carbon-2 and carbon 4. uracil: ChEBI ID CHEBI:17568: Definition A common and naturally occurring pyrimidine nucleobase in which the pyrimidine ring is substituted with two oxo groups at positions 2 and 4. A and G are categorized as purines, and C, T, and U are called pyrimidines. Guanine is defined as one of the four main bases in nucleic acids. 1. Pronunciation of deoxyribose with 5 audio pronunciations, 3 synonyms, 1 meaning, 9 translations and more for deoxyribose. noun. The genetic code is the sequence of nucleotide bases in nucleic acids ( DNA and RNA) that code for amino acid chains in proteins. Uracil is among the five nucleobases: adenine, guanine, cytosine, and thymine,but is only found in RNA. The basic property derives from the lone electron pair on the nitrogen atom. 3. a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine. Tags for the word Uracil: Hindi meaning of Uracil, What Uracil means in hindi, Uracil meaning in hindi, hindi mein Uracil. How unique is the name Uracil? Out of 6,311,504 records in the U. Look through examples of uracil translation in sentences, listen to pronunciation and learn grammar. a single-stranded nucleic acid that encodes genetic information. Background Total neoadjuvant therapy (TNT) is a novel treatment strategy that is an alternative to preoperative chemoradiotherapy (CRT) for locally advanced rectal cancer (LARC). Learn the function of uracil, as well as its properties. Record yourself saying 'uracil' in full sentences, then watch yourself and listen. All these transformations disrupt base pairing at the site of the change, and this produces a structural deformation in the double helix. DNA serves as the molecular basis of heredity through replication, expression, and translation processes. The UNG gene is located on chromosome 12q24. Check 'uracil' translations into Croatian. 2. Uracil . or. Cytosine 2. Look through examples of Uracil translation in sentences, listen to pronunciation and learn grammar. Quotes. Record yourself saying 'uracil' in full sentences, then watch yourself and listen. DNA is analyzed and found to have 23% adenine, which of the following would not be correct regarding the other. Ang uracil ay hindi karaniwang matatagpuan sa DNA na umiiral lamang bilang nasirang produkto ng cytosine. David. Tags for the entry "uracil" What uracil means in Tamil, uracil meaning in Tamil, uracil definition, explanation, pronunciations and examples of uracil in Tamil. 10 g/mol and a melting point of 320 to 325 °C. Uracil pronunciation in Australian English Uracil pronunciation in American English Uracil pronunciation in American English Take your English pronunciation to the next level with this audio dictionary references of the word uracil. uracil pronunciation with translations, sentences, synonyms, meanings, antonyms, and more. It is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached (an amine group at position 4 and a keto group at position 2). Thymine is one of the five bases used to build nucleic acids. nonconformity Use the word bank to answer the question. The two main types of nucleic acids are deoxyribonucleic acid (DNA)ribonucleic acid (RNA). Adenine and guanine are fused five - and six-membered purines, while cytosine and thymine are six-membered rings called uracil (U), replaces thymine in RNA. A purine, on the other hand, has two rings of. Share the Definition of uracil on Twitter Twitter. The methylation process is the expansion of a methyl bunch(CH 3) to a molecule. The structure of uracil can be described as. guanine. You'll be able to mark your mistakes quite easily. Games. DNA glycosylases—an ancient family of DNA repair proteins. In RNA, thymine is replaced with uracil. a. It is readily deaminated into uracil through spontaneous reactions as it is unstable. uracil: A pyrimidine derivative andone of the major component bases ofnucleotides and the nucleic acidRNA. Location: It is located in the nucleus of a cell and in the mitochondria. Transcription has three stages: initiation, elongation, and termination. It has a role as a metabolite, a human metabolite, an Escherichia coli metabolite and a mouse metabolite. Discover if uracil is found in DNA. Found in RNA, it base pairs with adenine and replaces thymine during DNA transcription. The structure of DNA was described in 1953, leading to further understanding of DNA replication and hereditary control of cellular activities. Uracil is a colorless crystalline organic molecule with the chemical formula C 4 H 4 N 2 O 2. Uracil: Uracil only occurs in RNA. Discover if uracil is found in DNA. It was named in 1885 by the German biochemist Albrecht Kossel, in reference to the pancreas (a specific gland) from which Kossel's sample had been extracted. The four bases are incorporated into DNA as nucleotides. e. Sample translated sentence: Uracil có thể bị methyl hoá tạo thành thymine. Uracil is similar to thymine in terms of structure except for the methyl group at position 5 in the heterocyclic aromatic ring present in thymine. Understand the definition and structure of the compound uracil. The present study will be an open-label, single-arm, single-center trial to develop a new. io free pronunciation tutorials. These two processes are essential for life. Vad är Uracil . Uracil-DNA Glycosylase, heat-labile contains the equally named enzyme found in the marine bacterium BMTU 3346. Record yourself saying 'uracil' in full sentences, then watch yourself and listen. Two patients have small deletions that created a premature stop codon. Our Apps are nice too! Dictionary. n. A simple adenine definition is a chemical compound used to make the nucleotide building blocks of DNA and RNA as well as substances that store and provide energy for cells. A pyrimidine is an organic compound known as an aromatic heterocyclic compound and has the molecular formula of C 4 H 4 N 2. A ribonucleotide is a nucleotide that has a ribose as its sugar component. Uracil has a molar mass of 112. Uridine (symbol U or Urd) is a glycosylated pyrimidine analog containing uracil attached to a ribose ring (or more specifically, a ribofuranose) via a β-N 1-glycosidic bond. Origin and meaning of name Adenine. The word or phrase uracil refers to a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine. The word or phrase uracil refers to a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine. It has a pyrimidine ring structure. Related to this Question. Several pyrimidine compounds were isolated. The term «uracil» is regularly used and occupies the position in our list of most widely used terms in the English dictionary. See uracil meaning in Marathi, uracil definition, translation and meaning of uracil in Marathi. In. Our native speakers' recordings feature English and American spellings and definitions, delivering a natural and clear sound. It is functionally. Thymine and uracil are distinguished by merely the presence or absence of a. 2 µg DNA (10 4 -10 5 cpm/µg) in 30 minutes at 37°C. (YOOR-uh-sil) A chemical compound that is used to make one of the building blocks of RNA. Definition. Guanine can also be used in an energy carrying molecule GTP, but those instances are vastly outnumbered by ATP. premium. A purine (adenine or guanine) or pyrimidine (uracil or cytosine) is attached to the 1' carbon of the sugar. Guanine-Cytosine base pair. RNA, on the other hand, is a single-stranded molecule. How to say Lyme all uracil in English? Pronunciation of Lyme all uracil with and more for Lyme all uracil. The nitrogenous bases in RNA are adenine, guanine, cytosine, and uracil, which replaces thymine in DNA. . updated: November 18, 2023 Definition 00:00 00:29 Uracil (U) is one of the four nucleotide bases in RNA, with the other three being adenine (A), cytosine (C) and guanine (G). The repeating, or monomer, units that are linked together to form nucleic acids are known as nucleotides. creating new combinations of alleles. Tags for the entry "uracil" What uracil means in Punjabi, uracil meaning in Punjabi, uracil definition, explanation, pronunciations and examples of uracil in Punjabi. Forum discussions with the word(s) "uracil" in the title:Of note, in DNA, the “Uracil” base is a slightly different base called “Thymine. any of a group of molecules. It is a part of both nucleosides and a nucleotide. one of the nitrogen-containing bases (see pyrimidine) occurring in the nucleic acid RNA. . m ɪ ˌ d iː n /) is an aromatic, heterocyclic, organic compound similar to pyridine (C 5 H 5 N). [2] After transcription and following synthesis, RNA can be modified with over. The deoxyribonucleic acid (DNA) of a typical mammalian cell contains about 3 × 10 9 nucleotides. 4K . Record ‘Uracil‘ in a full sentence then watch or listen back. colorless. Uracil is similar to thymine in terms of. This can account for its utilization in RNA. Start Free Trial. Understand the definition and structure of the compound uracil. The RNA code contains a U instead of a T – uracil instead of thymine. Each nucleic acid contains four of five possible nitrogen-containing bases: adenine (A), guanine (G), cytosine (C), thymine (T), and uracil (U). [1] It was patented in 1967 and approved for medical use in 1972. uracil: A pyrimidine derivative andone of the major component bases ofnucleotides and the nucleic acidRNA. Refine your pronunciation of uracil with our free online dictionary. nobeastsofierce/Science Photo Library. uracil attached to the ribose sugar. 027275 Da. . Pyrimidine is a heterocyclic aromatic organic compound with a single ring (called a pyrimidine ring) with alternating carbon and nitrogen atoms. DeoxyUridine (dU) can be substituted for dT in DNA oligonucleotides. Uracil, a colourless, crystalline organic compound of the pyrimidine family that occurs as a component of ribonucleic acid (RNA), a molecule involved in the transmission of hereditary characteristics. It has a melting point of 316- 317 °C. a phosphate group and a nitrogenous base, either Adenine, Guarine, Cytosine, Thymine, or Uracil. Uracil-ftorafur is a combination of tegafur, an oral prodrug of fluorouracil, and uracil in a 1:4 molar ratio. Uracil is similar to thymine in terms of. How to say acetylation in English? Pronunciation of acetylation with 2 audio pronunciations, 3 synonyms, 2 meanings, 14 translations, 1 sentence and more for acetylation. URACIL definition: a pyrimidine present in all living cells , usually in a combined form, as in RNA. audio files are free to play or download. It has a chemical formula of C 4 H 5 N 3 O. Its nucleoside contains a pyrimidine base, i. Most methylated nucleotides are in the coding district of DNA minimal in the advertiser area. RNA Adenine will also pair with DNA’s Thymine, and DNA Adenine will pair with RNA’s Uracil. Pyrimidine is the parent compound of the pyrimidines; a diazine having the two nitrogens at the 1- and 3-positions. Uracil: Definition & Structure. Definition of a nucleotide. Sample translated sentence: In RNA, thymine is replaced by uracil (U). URACIL definition: a pyrimidine present in all living cells , usually in a combined form, as in RNA. DNA and RNA base pairing is slightly different since DNA uses the bases adenine, thymine, cytosine, and guanine; RNA uses adenine, uracil, cytosine, and guanine. Properties of Uracil. ↔ En ARN, la timina es reemplazada por uracilo (U). Related to this Question. Uracil 3. Thymine is one of the four nitrogenous nucleobases that form the basic building blocks of deoxyribonucleic acid (DNA). Learn the function of uracil, as well as its properties. ; Record yourself saying 'uracil' in full sentences, then watch yourself and listen. carrier RNA. Nucleotides are composed of a sugar, a nitrogenous base, and a phosphoric acid. Tegafur is a chemotherapeutic prodrug of 5-fluorouracil (5-FU) used in the treatment of cancers. uracil, a colourless, crystalline organic compound of the pyrimidine family that occurs as a component of ribonucleic acid ( RNA ), a molecule involved in the transmission of hereditary characteristics. The guanine nucleoside is called guanosine . Learn how to say Phosphodiester with EmmaSaying free pronunciation tutorials. Here are 4 tips that should help you perfect your pronunciation of 'uracil': Break 'uracil' down into sounds : [YOOR] + [UH] + [SIL] - say it out loud and exaggerate the sounds until you can consistently produce them. Thymine is an organic aromatic. How to say Thymine in English? Pronunciation of Thymine with 3 audio pronunciations, 2 synonyms, 12 translations and more for Thymine. uracil (yoor-ă-sil) n. The guanine nucleoside is called guanosine . RNA polymerase (RNApol) is a multi-unit enzyme that is responsible for creating a complimentary strand of nucleic acid, called RNA, from a single stranded DNA template through the incorporation of adenosine, cytosine, guanine and uracil nucleotides. The name of the base is generally used as the name of the nucleotide, although this is technically incorrect. Discover if uracil is found in DNA. Vocabulary. It has adenine, thymine, Guanine and Cytosine, where adenine pairs up with thymine and guanine pairs up with cytosine, in case of RNA, thymine is replaced. Learn the definition of 'uracil nucleotide'. coli it hydrolyzes uracil-glycosidic bonds in single- or double-stranded DNA, excising uracil and creating alkali-sensitive abasic sites in the DNA. Uracil: The heterocyclic aromatic ring of uracil contains two keto groups at its C-2 and C-4. Nucleotides can be further broken down to a. The map shown above gives the frequency of use of the term «uracil» in the different countries. Understand the definition and structure of the compound uracil. Heterocyclic compounds are stable, ring-shaped compounds in which not. Look through examples of Uracil translation in sentences, listen to pronunciation and learn grammar. U A pyrimidine base, C4H4N2O2, that is an. As a result, pyrimidines are planar molecules and are. Atoms or groups attached to this ring. Pronunciation [edit] IPA : /ˈjʊərəsɪl/ Noun [edit] uracil (countable and uncountable, plural uracils) (organic chemistry) One of the bases of RNA, pairing with. In a nucleic acid chain, a subunit that consists of a sugar, a phosphate, and a nitrogenous base. CYTOSINE, GUANINE, URACIL Pronunciation Symbols. One of the bases of RNA. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Check out the pronunciation, synonyms and grammar. Understand the definition and structure of the compound uracil. , USA pronunciation n. Why is uracil used in RNA? Uracil is energetically less expensive for the production of thymine. Definition. A rock sample that a Japanese space probe collected from an asteroid suggests a possible source of compounds that enabled the development of life on Earth. The nitrogenous base comes under the type of pyrimidine base, which appears as a single ring structure within the backbone of ribonucleic acid where it complements pairs with the purine base adenine by two hydrogen bonds. Is a polymer with a ribose and phosphate backbone with four varying bases: uracil, cytosine, adenine and guanine. Discover if uracil is found in DNA. Sample translated sentence: RNA uses U (uracil) instead of T ↔ Gumagamit ng U (“uracil”) ang RNA sa halip na T . A tablet formulation containing 5-ethynyluracil (GW776), an ethynyl derivative of uracil and the antineoplastic agent 5-Fluorouracil (5-FU) in a 10:1 ratio. The biggest difference is in their shape: DNA is a two-stranded molecule in the form of a double helix. Learn the function of uracil, as well as its properties. ” In DNA, A and T pair. Learn the function of uracil, as well as its properties. piqued and more. In DNA and RNA, cytosine. This means that the 5′-phosphoric group of one nucleotide is. Copyright ©. This can account for its utilization in RNA. Translation then decodes mRNA into amino acids, forming proteins essential for life functions. 5,6-Dihydrouracil acts as an intermediate in the catabolism of uracil. Chapter 11 / Lesson 9. Another marked difference is the uracil of RNA in place of thymine in DNA. How would you pronounce Uracil?What is uracil in English? Pronunciation, translation, synonyms, examples, rhymes, definitions of uracil in English. Spoken pronunciation of uracil in English and in Punjabi. RNA is made up of sequence of 4 chemical building. ( A) A nucleotide (guanosine triphosphate). Synonyms : U. Return to Modified Bases Modifications. a. Definition. An RNA molecule has a backbone made of alternating phosphate groups and the sugar ribose, rather than the deoxyribose found in DNA. Uracil-DNA Detection Methods. 00:00. Here are 4 tips that should help you perfect your pronunciation of 'uracil':. How to say uracil in English? Pronunciation of uracil with 2 audio pronunciations, 1 synonym, 1 meaning, 10 translations and more for uracil. By attaching to ribose through the glycosidic bond, the uracil can form the uridine which is. Uracil is a pyrimidine base, which is an essential constituent of RNA. Unit Definition One unit is defined as the amount of enzyme that catalyzes the release of 60 pmol of uracil per minute from double-stranded, uracil-containing DNA. With the help of enzyme uracil glycosylase such defects in. Pyrimidine (C 4 H 4 N 2; / p ɪ ˈ r ɪ. There are three major types of RNA involved in this process: (1) messenger RNA (mRNA), (2) transfer RNA (tRNA), and (3) ribosomal RNA (rRNA). Understand the definition and structure of the compound uracil. ura· cil ˈyu̇r-ə-ˌsilUracil like other pyrimidines is an aromatic heterocyclic compound with a pyrimidine ring that comprises alternating nitrogen and carbon atoms. The RNA molecule consists of a sequence of nucleotides, each containing a five-carbon sugar (ribose), a phosphate group, and a nitrogenous base.