| Date | November 2021 | Marks available | 1 | Reference code | 21N.1.SL.tz0.12 |
| Level | Standard Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Question number | 12 | Adapted from | N/A |
Question
Which reaction represents aerobic catabolism?
A. Gluconeogenesis
B. Lactate formation
C. Electron transport chain
D. Protein synthesis
Markscheme
C
Examiners report
Aerobic catabolism in this context was unique in how it was asked and a difficult knowledge area making this the second most difficult question with an equally high discrimination index.
