DP Chemistry (last assessment 2024)

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Question 18N.3.sl.TZ0.a

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Date November 2018 Marks available [Maximum mark: 2] Reference code 18N.3.sl.TZ0.a
Level sl Paper 3 Time zone TZ0
Command term Describe Question number a Adapted from N/A
a.
[Maximum mark: 2]
18N.3.sl.TZ0.a

Enzymes are mainly globular proteins.

Describe the interaction responsible for the secondary structure of a protein.

[2]

Markscheme

hydrogen bonding ✔

between C=O and H–N «groups» ✔

 

Accept a diagram which shows hydrogen bonding for M1 and which shows the interaction between O of C=O and H of NH groups for M2.

Accept “between amido/amide/carboxamide” but not “between amino/amine” for M2.

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