DP Biology (last assessment 2024)
Question 19N.3.SL.TZ0.17b.ii
| Date | November 2019 | Marks available | [Maximum mark: 2] | Reference code | 19N.3.SL.TZ0.17b.ii |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Outline | Question number | b.ii | Adapted from | N/A |
b.ii.
[Maximum mark: 2]
19N.3.SL.TZ0.17b.ii
The electron micrograph below shows part of an epithelial cell from the digestive system.
[Source: Louisa Howard, Katherine Connollly – Dartmouth Electron Microscope Facility]
(b.ii)
Outline two adaptations of this cell to its function that are visible in this electron micrograph.
[2]
Markscheme
a. microvilli increase the surface area for absorption ✔ Each adaptation needs function stated. Do not accept villi, microvilli is required.
b. many mitochondria produce ATP/energy «for active transport» ✔
c. vesicles resulting from endocytosis ✔
