Date | May 2022 | Marks available | 1 | Reference code | 22M.1.HL.TZ2.6 |
Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
Command term | Question number | 6 | Adapted from | N/A |
Question
The diagram shows the structure of the protein CXCL12.
[Source: Lu, J., Chatterjee, M., Schmid, H. et al. CXCL14 as an emerging immune and inflammatory modulator.
J Inflamm 13, 1 (2016). https://doi.org/10.1186/s12950-015-0109-9 Distributed under the terms of the
Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).]
Which chemical group is found at X?
A. NH2
B. NOH
C. COH
D. COOH
Markscheme
D
Examiners report
[N/A]