| Date | May 2013 | Marks available | 1 | Reference code | 13M.1.HL.TZ2.25 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 25 | Adapted from | N/A |
Question
How does DNA replicate?
A. The deoxyribose of a free nucleotide is linked to the phosphate of the last nucleotide in the chain.
B. The phosphate of a free nucleotide is linked to the deoxyribose of the last nucleotide in the chain.
C. Nucleotides are linked in a 3′ to 5′ direction and the new strands are anti-parallel to the template strands.
D. Nucleotides are linked in a 5′ to 3′ direction and the new strands are parallel to the template strands.
Markscheme
B
Examiners report
N/A
