DP Biology (last assessment 2024)
Question 18N.3.SL.TZ0.1c.ii
| Date | November 2018 | Marks available | [Maximum mark: 1] | Reference code | 18N.3.SL.TZ0.1c.ii |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Predict | Question number | c.ii | Adapted from | N/A |
c.ii.
[Maximum mark: 1]
18N.3.SL.TZ0.1c.ii
A variegated Pelargonium plant was grown outdoors in a plant pot. Figure 1 shows one leaf of the Pelargonium. The plant was left in the dark for 24 hours to inhibit photosynthesis. After this time, a sketch was made of the leaf to show the colours (Figure 2), then part of the leaf was covered with black card (Figure 3). Following the exposure of the plant to sunlight for six hours, the black card was removed and the leaf tested for starch (Figure 4).
(c.ii)
Predict how the action spectrum from the white areas of the leaf would differ from the green areas.
[1]
Markscheme
it would be a straight line/have no peaks
OR
no photosynthesis ✔
Accept a labelled horizontal line in the bottom third of the y-axis.
Do not accept “lower line” or “lower photosynthesis”
