| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.SL.TZ1.2 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 2 | Adapted from | N/A |
Question
Which of the following will contribute to the cell theory?
I. Living organisms are composed of cells.
II. All cells come from pre-existing cells by mitosis.
III. Cells are the smallest units of life.
A. I only
B. II only
C. I and III only
D. I, II and III
Markscheme
C
Examiners report
This question was a poor discriminator in spite of being relatively easy, and most candidates chose option D instead of the correct response of C. In the G2 forms, some teachers comment that the addition of “by mitosis” at the end of item II could interfere with the assessment of the students‟ understanding of cell theory. However, it was felt that this had not been a significant problem for the candidates since a large number had chosen the correct answer.
