| Date | May 2016 | Marks available | 1 | Reference code | 16M.1.HL.TZ0.15 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Identify | Question number | 15 | Adapted from | N/A |
Question
The diagram is a model of one type of movement across a membrane.
What is this type of movement?
A. Simple diffusion
B. Facilitated diffusion
C. Osmosis
D. Active transport
Markscheme
B
Examiners report
This question brought many comments. The IB has agreed with many teachers that the diagram is not appropriate, as facilitated diffusion was meant to be shown, but the change in the shape of the protein could have implied the use of energy through active transport. Therefore both answers A and D were accepted.
