DP Chemistry (last assessment 2024)
Question 20N.3.sl.TZ0.a(ii)
| Date | November 2020 | Marks available | [Maximum mark: 2] | Reference code | 20N.3.sl.TZ0.a(ii) |
| Level | sl | Paper | 3 | Time zone | TZ0 |
| Command term | Explain | Question number | a(ii) | Adapted from | N/A |
a(ii).
[Maximum mark: 2]
20N.3.sl.TZ0.a(ii)
Consider the structures of medicinal molecules in section 37 of the data booklet.
Explain how zanamivir works as a preventative agent against flu viruses.
[2]
Markscheme
«drug» blocks/inhibits «viral» enzyme/neuraminidase/ «activity» ✔
prevents virus from leaving/escaping host cells «thus cannot infect other cells» ✔
Do not accept other anti-viral methods (as question is specific to Zanamivir).
Examiners report
Even when a relevant number of students obtained at least one mark, the quality of the answers was in general low and many evidenced very shallow understanding just repeating information
