DP Biology (first assessment 2025)
Question 22M.1A.HL.TZ2.6
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.1A.HL.TZ2.6 |
| Level | HL | Paper | 1A | Time zone | TZ2 |
| Command term | Question number | 6 | Adapted from | N/A |
6.
[Maximum mark: 1]
22M.1A.HL.TZ2.6
The micrograph of a section through a plant stem shows at least ten different types of cells.
[Source: Joan Carles Juarez / Shutterstock.com.]
What explains the differences between these cells?
A. Only one gene is expressed in each cell type.
B. Different genes are expressed in each cell type.
C. Only useful genes remain in the DNA of each cell type.
D. Changes in the DNA sequence take place when these cells develop.
[1]
Markscheme
B
Examiners report
It was commented that the use of plant material was an unnecessary distractor but that did not show in the student responses with over 70 % of students answering correctly and the question discriminating well.
