DP Biology (last assessment 2024)
Question 18N.2.HL.TZ0.1c
| Date | November 2018 | Marks available | [Maximum mark: 1] | Reference code | 18N.2.HL.TZ0.1c |
| Level | HL | Paper | 2 | Time zone | TZ0 |
| Command term | State | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 1]
18N.2.HL.TZ0.1c
Mutagens can be removed from the body by converting them to readily excreted metabolites. NNK is converted to a metabolite, NNAL-Gluc, which can be used as a biomarker for the uptake of NNK. Cotinine, a metabolite of nicotine, is an indicator of tobacco smoke uptake. The graph shows the relationship between these two metabolites in the urine of 233 smokers.
(c)
State the highest concentration of cotinine in the urine, giving the units.
[1]
Markscheme
42 nmol ml–1 ✔
