| Date | May 2015 | Marks available | 2 | Reference code | 15M.3.HL.TZ2.14 |
| Level | Higher level | Paper | Paper 3 | Time zone | Time zone 2 |
| Command term | Identify | Question number | 14 | Adapted from | N/A |
Question
The electron micrograph shows the epithelial cells of the villus.
Identify the parts labelled I and II.
I: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
II: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Markscheme
a. I: microvilli;
b. II: tight junction / plasma membrane;
Examiners report
Most candidates were able to identify microvilli but fewer identified the tight junction, not relating to structures that would be visible with an electronic microscope, as stated in the syllabus.
