Edexcel GCE Biology - Pearson qualifications | Edexcel ...
May 21, 2013 · A protein consists of a chain of amino acids joined together by bonds. (i) In the space below, draw a diagram to show the structure of an amino acid. (3) e x e m p ... Aan ester bond Ba glycosidic bond Ca hydrogen bond e x Da phosphodiester bond e m p l a ... chemical DCPIP. DCPIP is blue when it is in its oxidised form and colourless when it ...
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