| Date | May 2017 | Marks available | 1 | Reference code | 17M.1.SL.TZ1.15 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 15 | Adapted from | N/A |
Question
How does the proteome of a species contain a larger number of proteins than genes that code for these proteins?
A. Some proteins have more than one polypeptide chain.
B. There are genes that code for several proteins.
C. Not all proteins are coded for by the genome.
D. Some proteins are coded for by other proteins.
Markscheme
B
Examiners report
[N/A]
