| Date | May 2021 | Marks available | 1 | Reference code | 21M.1.SL.tz0.14 |
| Level | Standard Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Question number | 14 | Adapted from | N/A |
Question
Which energy system is the predominant contributor of ATP for a runner participating in a marathon?
A. ATP–PC system
B. Anaerobic system
C. Lactic acid system
D. Aerobic system
Markscheme
D
Examiners report
Common higher level question. Mid-difficulty question.
