DP Biology (first assessment 2025)
Question 19M.2.HL.TZ2.a.iii
| Date | May 2019 | Marks available | [Maximum mark: 2] | Reference code | 19M.2.HL.TZ2.a.iii |
| Level | HL | Paper | 2 | Time zone | TZ2 |
| Command term | State | Question number | a.iii | Adapted from | N/A |
a.iii.
[Maximum mark: 2]
19M.2.HL.TZ2.a.iii
DNA has regions that do not code for proteins. State two functions of these regions.
1.
2.
[2]
Markscheme
a. promoters / operators / regulation of gene expression/transcription ✔
b. telomeres/give protection to the end of chromosomes «during cell division» ✔
c. genes for tRNA/rRNA production ✔
d. other valid function for non-coding sequence ✔
Do not accept stop codon, accept centromeres (connecting sister chromatids).
Examiners report
This question was well answered. The occasional answer made reference to processes associated with translation.
