DP Biology (last assessment 2024)
Question 23M.3.HL.TZ2.2ai
| Date | May 2023 | Marks available | [Maximum mark: 1] | Reference code | 23M.3.HL.TZ2.2ai |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | State | Question number | i | Adapted from | N/A |
i.
[Maximum mark: 1]
23M.3.HL.TZ2.2ai
(i)
State a variable that should be kept constant.
[1]
Markscheme
enzyme/substrate/egg white concentration/volume/pH/temperature;
Accept another reasonable variable.
Examiners report
The concept of control and independent variables appeared well understood by candidates.
