Question 22M.2.SL.TZ2.2a
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.2.SL.TZ2.2a |
| Level | SL | Paper | 2 | Time zone | TZ2 |
| Command term | State | Question number | a | Adapted from | N/A |
State the main characteristic of stem cells.
[1]
undifferentiated/pluripotent/ability to divide/differentiate into any types of cells/differentiate along different pathways;
In a. most were able to say the stem cells were undifferentiated. Many put ‘unspecialised’ instead, which was not credited. There were several, justified G2 comments about the size of the micrograph, which made it difficult to measure the diameter accurately. However, this was generally very poorly answered, with over half failing to get the mark for either the correct answer or the correct calculation. In 1d the better candidates stated that the person could now live a normal life, but as it was not in the genome the progeny could still be affected. The word ‘progeny’ was commented on by several teachers, who pointed out that ‘children’, or ‘offspring’ would have been clearer for those working in an additional language.
