| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.SL.TZ2.14 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 14 | Adapted from | N/A |
Question
How many molecules of water are required to completely hydrolyse a polypeptide made up of 23 amino acids?
A. 11
B. 22
C. 23
D. 44
Markscheme
B
Examiners report
This question turned out to be one of the most difficult for candidates, but tested candidate understanding of the process of hydrolysis and was a good discriminator.
