| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.HL.TZ1.2 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 2 | Adapted from | N/A |
Question
A red blood cell is 8 μm in diameter. If drawn 100 times larger than its actual size, what diameter will the drawing be in mm?
A. 0.08 mm
B. 0.8 mm
C. 8 mm
D. 80 mm
Markscheme
B
Examiners report
Many candidates were not able to do this calculation correctly and convert µm to mm. Although the size of the drawing calculated was admittedly too small for a real drawing, there was no reason why the correct conversion could not be made. It did discriminate as the more able candidates got this correct while the others guessed between the other choices of answers.
Syllabus sections
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