| Date | May 2017 | Marks available | 1 | Reference code | 17M.3.hl.TZ2.15 |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | Deduce | Question number | 15 | Adapted from | N/A |
Question
DNA is a complex molecule.
Outline how its structure allows it to be negatively charged in the body.
[1]
a.
Deduce the nucleotide sequence of a complementary strand of a fragment of DNA with the nucleotide sequence –GACGGATCA–.
[1]
b.
Markscheme
phosphate groups «in nucleotides fragments are almost completely» ionized
Do not accept just “phosphate «groups»”.
[1 mark]
a.
–CTGCCTAGT–
[1 mark]
b.
Examiners report
[N/A]
a.
[N/A]
b.
