DP Chemistry (last assessment 2024)
Question 19N.3.hl.TZ0.21b
| Date | November 2019 | Marks available | [Maximum mark: 1] | Reference code | 19N.3.hl.TZ0.21b |
| Level | hl | Paper | 3 | Time zone | TZ0 |
| Command term | State | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 1]
19N.3.hl.TZ0.21b
Codeine, morphine and diamorphine (heroin) are derived from opium.
(b)
Experimental research on both animals and humans contributes to the development of pharmaceuticals.
State the meaning of the term therapeutic index in human studies.
[1]
Markscheme
toxic dose for 50% of population divided by «minimum» effective dose for 50 % of population ✔
NOTE: Accept “TD50/ED50”.
Reference to 50% required.
