| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.SL.TZ1.11 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | State | Question number | 11 | Adapted from | N/A |
Question
Which chemical is produced during both aerobic and anaerobic respiration in humans?
A. Carbon dioxide
B. Pyruvate
C. Water
D. Lactate
Markscheme
B
Examiners report
Some G2 feedback suggested that option A was the best answer to this question, and although many candidates chose this, it is wrong, as the wording of the question clearly states “during both aerobic and anaerobic respiration”. Furthermore, it was felt that the use of the word “produced” had not presented a problem to the candidates.
Syllabus sections
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