DP Biology (first assessment 2025)
Question 22M.2.SL.TZ2.a.ii
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.2.SL.TZ2.a.ii |
| Level | SL | Paper | 2 | Time zone | TZ2 |
| Command term | Calculate | Question number | a.ii | Adapted from | N/A |
a.ii.
[Maximum mark: 1]
22M.2.SL.TZ2.a.ii
Calculate the length of the entire cell labelled Y, showing your working.
[1]
Markscheme
50 μm = 27/28/29 mm, Y = 8/9/10 mm
OR
50 x 9 /27
OR
16.7 μm (accept answers in the range of 14.8 μm to 17.2 μm)
Award [1] for correct ratios not precise measurements in the work or [1] for correct answer with correct unit.
Examiners report
Most answers were correct, but some calculations were difficult to follow; some errors in unit conversions led to incorrect decimal places.
