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  2. Cytosine - Wikipedia

    en.wikipedia.org/wiki/Cytosine

    Cytosine (/ ˈ s aɪ t ə ˌ s iː n,-ˌ z iː n,-ˌ s ɪ n / [2] [3]) (symbol C or Cyt) is one of the four nucleotide 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 ...

  3. List of scientists whose names are used as units - Wikipedia

    en.wikipedia.org/wiki/List_of_scientists_whose...

    The International System of Units (abbreviated SI from French: Système international d'unités) is the most widely used system of units of measurement. There are 7 base units and 22 derived units [1] (excluding compound units). These units are used both in science and in commerce. Two of the base SI units and 17 of the derived units are named ...

  4. Base pair - Wikipedia

    en.wikipedia.org/wiki/Base_pair

    This is particularly important in RNA molecules (e.g., transfer RNA), where Watson–Crick base pairs (guanine–cytosine and adenine–uracil) permit the formation of short double-stranded helices, and a wide variety of non–Watson–Crick interactions (e.g., G–U or A–A) allow RNAs to fold into a vast range of specific three-dimensional ...

  5. Nucleic acid - Wikipedia

    en.wikipedia.org/wiki/Nucleic_acid

    Well-studied biological nucleic acid molecules range in size from 21 nucleotides (small interfering RNA) to large chromosomes (human chromosome 1 is a single molecule that contains 247 million base pairs [18]). In most cases, naturally occurring DNA molecules are double-stranded and RNA molecules are single-stranded. [19]

  6. Nucleotide base - Wikipedia

    en.wikipedia.org/wiki/Nucleotide_base

    Five nucleobases—adenine (A), cytosine (C), guanine (G), thymine (T), and uracil (U)—are called primary or canonical. They function as the fundamental units of the genetic code, with the bases A, G, C, and T being found in DNA while A, G, C, and U are found in RNA. Thymine and uracil are distinguished by merely the presence or absence of a ...

  7. RNA - Wikipedia

    en.wikipedia.org/wiki/RNA

    After a certain amount of time, the message degrades into its component nucleotides with the assistance of ribonucleases. [27] Transfer RNA (tRNA) is a small RNA chain of about 80 nucleotides that transfers a specific amino acid to a growing polypeptide chain at the ribosomal site of

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  9. Macromolecule - Wikipedia

    en.wikipedia.org/wiki/Macromolecule

    The single-stranded nature of RNA, together with tendency for rapid breakdown and a lack of repair systems means that RNA is not so well suited for the long-term storage of genetic information as is DNA. In addition, RNA is a single-stranded polymer that can, like proteins, fold into a very large number of three-dimensional structures.

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