DP Biology (first assessment 2025)
Question 20N.1A.SL.TZ0.1
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.1A.SL.TZ0.1 |
| Level | SL | Paper | 1A | Time zone | TZ0 |
| Command term | Question number | 1 | Adapted from | N/A |
1.
[Maximum mark: 1]
20N.1A.SL.TZ0.1
The electron micrograph shows a section through a cell.
[Source: Photo © E. Newcomb. Nucleus, glyoxisomes, chloroplasts, and mitochondria - magnification
at 13,900x - UWDC - UW-Madison Libraries (wisc.edu) (https://search.library.wisc.edu/digital/AE2SBIWRVTRR5T87).]
What is the name of the cell component labelled Y?
A. Golgi apparatus
B. Nucleus
C. Cytoplasm
D. Vacuole
[1]
Markscheme
B
Examiners report
The discrimination index for this question was fairly low, suggesting that some of the stronger candidates chose the wrong answer. The commonest mistake was to think that the nucleus was a vacuole, but the grainy appearance with darker lumps of heterochromatin was very characteristic of nuclei.
