1)Explain in terms of chemical bonding how the secondary and tertiary structures of a protein depend on the amino acids in its primary structure. In your answer, make specific reference to the structures shown.

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2) The structures of three amino acids at pH 6 and pH 8 are shown.

Samples of each amino acid underwent electrophoresis at pH 6 and pH 8. The results are shown below.

(i) Outline the process of electrophoresis used in identifying amino acids.

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(ii) Identify the amino acids X, Y and Z and justify your answer.

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