| Date | May 2019 | Marks available | 1 | Reference code | 19M.1.HL:.tz0.24 |
| Level | Higher Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Question number | 24 | Adapted from | N/A |
Question
What is the principal source of energy for the brain?
A. Aerobic glycolysis
B. Anaerobic glycolysis
C. Aerobic lipolysis
D. Creatine phosphate
Markscheme
A
Examiners report
Low-difficulty question (81.70 %).
