| Date | November 2012 | Marks available | 1 | Reference code | 12N.1.HL.TZ0.11 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 11 | Adapted from | N/A |
Question
When genes are transferred between species, the amino acid sequence of the polypeptide translated from them is unchanged. Why is this so?
A. All organisms use ribosomes for protein synthesis.
B. DNA replication is semi-conservative.
C. The enzymes used are substrate specific.
D. The genetic code is universal.
Markscheme
D
Examiners report
N/A
Syllabus sections
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