| Date | November 2014 | Marks available | 1 | Reference code | 14N.1.SL.TZ0.24 |
| Level | Standard level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 24 | Adapted from | N/A |
Question
Colonic irrigation involves regularly flushing the large intestine with water. Why should this practice be avoided?
A. The large intestine absorbs water.
B. Vitamin-producing bacteria are eliminated.
C. It will stimulate the production of toxins.
D. Undigested remains of food are removed.
Markscheme
B
Examiners report
This happened to be a very difficult question for candidates and a bad discriminator. This means that good candidates believed that colonic irrigation should be avoided because the large intestine absorbs water. Only a few candidates realised that the problem of this practice is that it eliminates vitamin-producing bacteria. The topic 6.1.5 expects the functions of the large intestine and the production of Vitamin K is one of them.
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