DP Biology (first assessment 2025)
Question 23M.1A.SL.TZ1.7
| Date | May 2023 | Marks available | [Maximum mark: 1] | Reference code | 23M.1A.SL.TZ1.7 |
| Level | SL | Paper | 1A | Time zone | TZ1 |
| Command term | Question number | 7 | Adapted from | N/A |
7.
[Maximum mark: 1]
23M.1A.SL.TZ1.7
The table shows the approximate energy stores in a man with an average mass.
| Available energy / kJ | |||
| Organ or tissue | Carbohydrates | Lipids | Proteins |
| Brain | 30 | 0 | 0 |
| Liver | 1700 | 2000 | 1700 |
| Adipose tissue | 330 | 560 000 | 170 |
[Source: Reprinted from Clinics in Endocrinology and Metabolism, 5(2),
Cahill Jr., G.F., Starvation in Man, Copyright (1976), with permission from Elsevier.]
What can be concluded from the data?
A. The brain contains no short-term stored energy.
B. The liver contains less long-term than short-term stored energy.
C. The adipose tissue provides for most of the long-term energy storage.
D. Carbohydrates provide more energy per gram than lipids or proteins.
[1]
Markscheme
C