BIOL107 Lecture Notes - Lecture 10: Untranslated Region, Transcription Bubble, Entertainment Uk

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BIOL107 Full Course Notes
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BIOL107 Full Course Notes
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Dna determines every characteristic of a cell or organism. It is the properties of the specific proteins in a cell/organism that directly determine its characteristics. Each protein has a distinct sequence of amino acids that determine the proteins shape and activity. These allow a given protein to perform very specific functions. Proteins are linear polymers of amino acids (aas) joined by peptide bonds ( called polypeptides) Different proteins consist of different numbers and different sequences of aas. This determines the shape and properties of a given protein ii. Most proteins have certain segments of the aa chain existing in coiled or folded patterns. Results from h-bonds between atoms in the polypeptide backbone. This aspect of protein structure/shape depends on interactions between aa r-groups. Covalent bonds between s atoms in r groups of two cysteine aas. Tertiary structure interactions cause protein to assume its characteristic shape iv. Some proteins consist of two or more polypeptide chains.

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