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Question 19N.3.hl.TZ0.10a

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.3.hl.TZ0.10a
Level hl Paper 3 Time zone TZ0
Command term Draw Question number a Adapted from N/A
a.
[Maximum mark: 2]
19N.3.hl.TZ0.10a

Aspartame is formed from the two amino acids aspartic acid (Asp) and phenylalanine (Phe).

(a)

Draw the structure of the dipeptide Asp–Phe using section 33 of the data booklet.

[2]

Markscheme

amide link (eg, CONH) ✔

correct order and structures of amino acids ✔

NOTE: Accept a skeletal formula or a full or condensed structural formula.
Accept zwitterion form of dipeptide.
Accept CO–NH but not CO–HN for amide link.

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