DP Biology (last assessment 2024)
Question 22M.2.HL.TZ2.5a.i
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.2.HL.TZ2.5a.i |
| Level | HL | Paper | 2 | Time zone | TZ2 |
| Command term | Describe | Question number | a.i | Adapted from | N/A |
a.i.
[Maximum mark: 1]
22M.2.HL.TZ2.5a.i
DNA forms chromosomes, but much of eukaryote DNA is non-coding.
[Source: Pixabay.]
(a.i)
Describe the structure of nucleosomes.
[1]
Markscheme
a unit of DNA wound/coiled around 8 histone proteins / octamer;
Examiners report
The structure of a nucleosome was correctly described for many, but some did not mention the number of histones.
