BIO101 Lecture Notes - Lecture 3: Phosphodiester Bond, Ribose, Uracil

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Rna (ribonucleic acid) is a single-stranded nucleic acid molecule and made up of ribonucleotides: a ribose nucleotide in the chain of rna consists of a ribose sugar, phosphate group, and a base. In each ribose sugar, one of the four bases is added: adenine (a), guanine (g), Cytosine (c), and uracil (u): the base is attached to a ribose sugar with the help of a phosphodiester bond. Additionally, dna is a double-stranded molecule whereas rna is a single-stranded molecule. These two sugars differ from each other in the presence or absence of an oxygen atom: ribose sugar is also a cyclical structure consisting of 5 carbon and one. Oh group in 2"carbon making it more stable to hold information: rna nucleotides carry the nitrogenous bases, purines, and pyrimidines. Rna in place of pyrimidine thymine, uracil is present which too forms hydrogen bonding with adenine just as thymine does in dna molecule.

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