DP Biology (first assessment 2025)
Question 19M.2.HL.TZ2.2b.ii
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.2.HL.TZ2.2b.ii |
| Level | HL | Paper | 2 | Time zone | TZ2 |
| Command term | Suggest | Question number | b.ii | Adapted from | N/A |
b.ii.
[Maximum mark: 1]
19M.2.HL.TZ2.2b.ii
(b.ii)
Suggest a way methylation may affect tumour cell genes.
[1]
Markscheme
a. «DNA» methylation may inhibit transcription of genes that would prevent cancer/tumor formation ✔
b. «DNA» methylation may increase mitosis/cell division leading to tumor formation ✔
Do not accept discussion of histone methylation.
Examiners report
Students lacked the understanding of epigenetics necessary to make reasonable suggestions.
