definition of cytosine
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- Cytosine (/ˈsaɪtəˌsiːn, -ˌziːn, -ˌsɪn/;[2][3] C) is one of the four main bases found in DNA and RNA, along with adenine, guanine, and thymine (uracil in RNA). 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).
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Thymine Thymine /ˈθaɪmɨn/ (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.
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Principles of Biochemistry/Nucleic acid II: RNA and its nucleotides The shape of adenine is complementary to either thymine in DNA or uracil in RNA. Cytosine (C). Cytosine (C) is one of the four main bases found in DNA and RNA, along with adenine, guanine, and thymine (uracil in RNA).
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DNA replication The sequence, or order, in which the nitrogenous bases adenine (A), cytosine (C), guanine (G), and thymine (T) are arranged in a gene or a DNA fragment, or in an organism's genome.
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Vitamin B4 (adenine) Vitamin B4, also known as adenine, is one of the five nitrogenous bases (cytosine, guanine, adenine, thymine and uracil) that helps make up the code in DNA and RNA.Adenine is a purine. Purines are six-membered rings attached to five membered.rings.itamin B4 (adenine) is a substance that acts as a co-enzyme with other substances, such as other vitamins to produce energy. Most of our energy comes from the mitochondria, which is the power producers of a cell.
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Hualalai Volcano The most recent eruption of 1800-1801 occurred along the Northwest rift zone. Haulalai is a shield volcano located on the Big Island of Hawaii (19.69 N, 155.87 W). The summit of Hualalai rises to 2523m (8271ft) above sea level. The volcano is the westernmost of the 5 major Big Island volcanoes. It has a well-developed Northwest rift zone, a moderately well-developed South-Southeast rift zone, and a poorly developed North rift zone. The most recent eruption of 1800-1801 occurred along the Northwest rift zone.
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What is Cytosine? Image Credit: Main Image: Cytosine is one of the four main bases found in DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), along with adenine, guanine, and thymine. Cytosine is one of the 5 nitrogenous bases that are attached to a 5 carbon sugar, pentose and a phosphate group to make nucleotides.ach nucleotide has three parts-a five carbon sugar, a phosphate group and an organic base. There are 2 variations of the sugar, depending on whether the nucleotide is in a DNA or RNA molecule. One of five different organic bases can be attached to each nucleotide-adenine, cytosine, guanine, thymine or uracil.
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cytoskeleton cytoskeleton noun The internal framework of a eukaryotic cell, composed of protein filaments that provide structural support and drive the movement of the cell and its internal components, typically divided into three categories (microfilaments, intermediate filaments, and microtubules) based on the diameter and composition of the filaments.
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- Science and technology news stories tagged with keyword: cytosine. ... has heard of adenine, thymine, guanine and cytosine-the A,T,G and C that make up the ... Encyclopedia article about cytosine. Information about cytosine in the Columbia Encyclopedia, Computer Desktop Encyclopedia, computing dictionary.
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cytoplasm cy·to·plasm. The jelly-like material that makes up much of a cell inside the cell membrane, and, in eukaryotic cells, surrounds the nucleus. The organelles of the cell, such as mitochondria and (in green plants) chloroplasts, are contained in the cytoplasm. The cytoplasm together with the nucleus make up the cell's protoplasm. See more at cell.
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cysteine Cysteine definition, a crystalline amino acid, C 3 H 7 O 2 NS, a component of nearly all proteins, obtained by the reduction of cystine. Symbol: C. See more.
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Definitions &Translations The cytoskeleton is a cellular scaffolding or skeleton contained within a cell's cytoplasm. The cytoskeleton is present in all cells; it was once thought to be unique to eukaryotes, but recent research has identified the prokaryotic cytoskeleton.
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cysteine cysteine. a sulfur-containing amino acid, one of the nonessential amino acids, produced by enzymatic or acid hydrolysis of proteins; it is readily oxidized to cystine and is sometimes found in urine. (sis-tē'in), Do not confuse this word with cystine.ysteine (Cys). [sis′tēn]. an amino acid found in many proteins in the body, including keratin. It is a metabolic precursor of cystine and an important source of sulfur for various body functions.
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adenine adenine ad·e·nine (ād'n-ēn', -ĭn) n. Abbr. A A purine base that is a constituent of DNA and RNA and an important energy transport and storage component in cellular metabolism.
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Cytosine Cytosine (C) Cytosine (C) is one of the four main bases found in DNA and RNA, along with adenine, guanine, and thymine (uracil in RNA). 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).
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Cytosine Cytosine can be found as part of DNA, as part of RNA, or as a part of a nucleotide. As cytidine triphosphate (CTP), it can act as a co-factor to enzymes, and can transfer a phosphate to convert adenosine diphosphate (ADP) to adenosine triphosphate (ATP). In DNA and RNA, cytosine is paired with guanine. However, it is inherently unstable, and can change into uracil (spontaneous deamination).
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cytoskeleton cy·to·skel·e·ton. a flexible network of various kinds of protein filaments, as microtubules, in the cytoplasm of eukaryotic cells, providing structure for the cell and helping with normal cell activity, esp. with movement and cellular division. noun.
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- noun, Cell Biology. 1. a tiny, somewhat mitten-shaped organelle occurring in great numbers in the cell cytoplasm either freely, in small clusters, or attached to the outer surfaces of endoplasmic reticula, and functioning as the site of protein manufacture. Origin of ribosome.
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DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing Cytosine bonds with guanine and adenine bonds with thymine. Professor Pear: You're quite right. 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.
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- Medical Definition of CYTOPLASM. : the organized complex of inorganic and organic substances external to the nuclear membrane of a cell and including the cytosol and membrane-bound organelles (as mitochondria or chloroplasts). — cy·to·plas·mic \ˌsīt-ə-ˈplaz-mik\ adjective. — cy·to·plas·mi·cal·ly \-mi-k(ə-)lē\ adverb. the organized complex of inorganic and organic substances external to the nuclear membrane of a cell and including the cytosol and membrane-bound organelles (as mitochondria or chloroplasts).
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- Define Repetitive DNA. Repetitive DNA synonyms, Repetitive DNA pronunciation, Repetitive DNA translation, English dictionary definition of Repetitive DNA. DNA A. adenine T. thymine C. cytosine G. guanine n. A nucleic acid that carries the genetic information in cells and some viruses, consisting of two long...
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purine purine. a heterocyclic compound that is the nucleus of the purine bases such as adenine and guanine (which occur in DNA and RNA), and xanthine and hypoxanthine.urine. a heterocyclic compound that is the nucleus of the purine bases such as adenine and guanine (which occur in DNA and RNA), and xanthine and hypoxanthine.
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Definitions &Translations (Science: chemical) a nucleoside that substitutes for thymidine in dna and thus acts as an antimetabolite. It causes breaks in chromosomes and has been proposed as an antiviral and antineoplastic agent. It has been given orphan drug status for use in the treatment of primary brain tumours.
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cytology cytology definition: The definition of cytology is a branch of biology that studies the structure and function of plant and animal cells. (noun) When a biologist studies how human blood cells work and how they relate to each other and to the rest of the...
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cysteine cysteine (Cys). [sis′tēn]. an amino acid found in many proteins in the body, including keratin. It is a metabolic precursor of cystine and an important source of sulfur for various body functions.cys·te·ine/ (sis-te´ēn) a sulfur-containing, nonessential amino acid produced by enzymatic or acid hydrolysis of proteins, readily oxidized to cystine; sometimes found in urine. Symbols Cys and C.
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Cytosine: Structure & Definition Cytosine is an important part of DNA and RNA, where it is one of the nitrogenous bases coding the genetic information these molecules carry. Cytosine can even be modified into different bases to carry epigenetic information. Cytosine has other roles in the cell, too, as the energy carrier and cofactor CTP. Structure. As a nitrogenous base, cytosine is full of nitrogen atoms (it has three). It also has one ring of carbon, which makes it a pyrimidine.