| Date | November 2012 | Marks available | 1 | Reference code | 12N.1.HL.TZ0.27 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 27 | Adapted from | N/A |
Question
The antisense strand of a DNA molecule has the sequence TACCCGATC. What would be the resulting mRNA strand sequence?
A. TACCCGATC
B. ATGGGCTAG
C. UACCCGAUC
D. AUGGGCUAG
Markscheme
D
Examiners report
Some teachers felt that the 3’ and 5’ terminals should have been indicated, but this was not needed for candidates to answer the question. The most common incorrect answer was chosen by candidates who were confused about the difference between sense and anti-sense strands.
