DP Biology (first assessment 2025)
Question 19M.2.SL.TZ1.2a
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.2.SL.TZ1.2a |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Identify | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 1]
19M.2.SL.TZ1.2a
(a)
Identify which electron micrograph shows a mitochondrion, providing one observation to support your choice.
[1]
Markscheme
«micrograph» C cristae/double membrane is visible/«folds of» membranes inside ✔
Must state observation
Examiners report
Most candidates identified the correct micrograph but for the wrong reason such as 70S ribosomes visible, has a matrix, or correct shape. Only starch granules were visible in the image, not ribosomes.
