| Date | November 2018 | Marks available | 1 | Reference code | 18N.1.HL.TZ0.4 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 / no time zone |
| Command term | Deduce | Question number | 4 | Adapted from | N/A |
Question
A cell was placed into a solution containing a dye. After two hours the concentration of the dye inside the cell was higher than in the solution. This was repeated in the presence of a substance that inhibits ATP. In this case the dye did not enter the cell. What is the probable mechanism by which the dye entered the cell?
A. Active transport
B. Simple diffusion
C. Osmosis
D. Facilitated diffusion
Markscheme
A
Examiners report
[N/A]
