DP Chemistry (last assessment 2024)
Question 19M.3.sl.TZ1.b(i)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.sl.TZ1.b(i) |
| Level | sl | Paper | 3 | Time zone | TZ1 |
| Command term | Outline | Question number | b(i) | Adapted from | N/A |
b(i).
[Maximum mark: 1]
19M.3.sl.TZ1.b(i)
Staphylococcus aureus (S. aureus) infections have been successfully treated with penicillin and penicillin derivatives.
The widespread use of penicillin and its derivatives has led to the appearance of resistant S. aureus strains.
Outline how these bacteria inactivate the antibiotics.
[1]
Markscheme
produce penicillinase/enzyme that deactivates penicillin [✔]
Examiners report
The action of penicillinase/beta-lactamase was less well known with only about a third of students gaining this mark.
