(a)[1]
Name one more natural polymer.
(b)[2]
Describe how proteins are hydrolysed to amino acids.
(c)[2]
The structure of the amino acid alanine is shown. Alanine can be polymerised to form poly(alanine). Draw the partial structure of poly(alanine) to show two repeat units.
(d)[2]
Serine can also make polymers using a different linkage. Name this linkage and explain how it is formed.
(e(i))[1]
Why is the baseline drawn in pencil rather than ink in paper chromatography?
(e(ii))[1]
Explain why the chromatography paper is sprayed with a locating agent.
(e(iii))[1]
Calculate the $R_f$ value of the amino acid labelled S from the chromatogram shown.