The simplified diagram shows the structure of terylene. Proteins are also polymers.

1. aName the type of linkage in terylene. [1]
2. bName a natural polymer with the same linkage as terylene. [1]
3. cDeduce the structures of the monomers of terylene (draw them on paper). [2]
4. dWhat are the products of the acid hydrolysis of proteins? [1]
5. eState how the products of the acid hydrolysis of proteins are separated and identified. [2]

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