DP Biology (first assessment 2025)
Question 20N.2.SL.TZ0.a.ii
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.2.SL.TZ0.a.ii |
| Level | SL | Paper | 2 | Time zone | TZ0 |
| Command term | State | Question number | a.ii | Adapted from | N/A |
a.ii.
[Maximum mark: 1]
20N.2.SL.TZ0.a.ii
State the role of cholesterol in animal cell membranes.
[1]
Markscheme
a. controls/regulates/reduces fluidity of membrane / prevents crystallization of phospholipids;
b. reduces permeability to some substances.
Do not accept ‘stabilizes membrane’.
Examiners report
Half of candidates were able to state the role of cholesterol in animal cell membranes.
