| Date | November 2015 | Marks available | 1 | Reference code | 15N.1.HL.TZ0.28 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 28 | Adapted from | N/A |
Question
From which substrate is the first carbon dioxide molecule released during cellular respiration?
A. Glucose
B. Pyruvate
C. Acetyl CoA
D. Citrate (a C6 intermediate compound in the Krebs cycle)
Markscheme
B
Examiners report
[N/A]
Syllabus sections
Additional higher level » Topic 8: Metabolism, cell respiration and photosynthesis » 8.2 Cell respiration
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