DP Chemistry (last assessment 2024)

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Question 18M.3.sl.TZ1.6c.ii

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.3.sl.TZ1.6c.ii
Level sl Paper 3 Time zone TZ1
Command term Outline Question number c.ii Adapted from N/A
c.ii.
[Maximum mark: 1]
18M.3.sl.TZ1.6c.ii

Insulin was the first protein to be sequenced. It was determined that the end of one chain had the primary structure Phe–Val–Asn–Gln.

Paper chromatography can be used to identify the amino acids in insulin.

(c.ii)

Outline how the amino acids may be identified from a paper chromatogram.

[1]

Markscheme

compare Rf with known amino acids

OR

compare distance moved with known amino acids

 

Accept “from Rf”.

[1 mark]

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