AQA Jan 2010 Paper 4 Q6

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areas outside the box will not be scanned for marking the three amino acids shown below were obtained by hydrolysis of a protein h n c cooh h n c cooh h n c cooh ch alanine ch ch ch ch nh valine lysine a i draw the zwitterion of alanine a ii draw the species formed when valine is dissolved in an alkaline solution mark a iii draw the species formed by lysine at low ph mark mark wmp jan chem b draw the two dipeptides formed by the reaction of alanine with valine areas outside the box will not be scanned for marking c name a suitable method by which the mixture of amino acids formed by hydrolysis of the protein can be separated mark marks turn over for the next question turn over wmp jan chem

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