DP Chemistry (last assessment 2024)
Question 19M.3.sl.TZ1.15a
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.sl.TZ1.15a |
| Level | sl | Paper | 3 | Time zone | TZ1 |
| Command term | Identify | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 1]
19M.3.sl.TZ1.15a
Staphylococcus aureus (S. aureus) infections have been successfully treated with penicillin and penicillin derivatives.
(a)
Identify the feature in penicillin responsible for its antibiotic activity.
[1]
Markscheme
«four-membered» beta-lactam ring [✔]
Note: Accept a diagram showing a structural representation of the beta-lactam ring.
Examiners report
Most students could identify the beta-lactam ring as the structural feature responsible for penicillin’s activity.
