| Date | November 2016 | Marks available | 1 | Reference code | 16N.1.HL.TZ0.4 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Deduce | Question number | 4 | Adapted from | N/A |
Question
The giant marine alga Halicystis ovalis is able to move sodium ions from vacuoles to the surrounding seawater through active transport. Which condition or feature is required for this mode of transport?
A. Movement from a region of higher sodium concentration to a region of lower sodium concentration
B. A partially permeable surface
C. Membrane fluidity
D. Transmembrane proteins
Markscheme
D
Examiners report
[N/A]
