DP Chemistry (last assessment 2024)
Question 18N.3.hl.TZ0.7
| Date | November 2018 | Marks available | [Maximum mark: 2] | Reference code | 18N.3.hl.TZ0.7 |
| Level | hl | Paper | 3 | Time zone | TZ0 |
| Command term | State, Suggest | Question number | 7 | Adapted from | N/A |
7.
[Maximum mark: 2]
18N.3.hl.TZ0.7
Genetic information is stored in DNA.
(a)
State the feature of DNA that determines the primary structure of proteins synthesised by a cell.
[1]
Markscheme
«triplet» sequence/«specific» order of «nitrogenous» bases
OR
codon ✔
(b)
Suggest one concern about the use of genetically modified, GM, food.
[1]
Markscheme
Any one of:
long-term «health» effects unknown ✔
can cause allergic reactions ✔
possible transfer of genetic material to other/wild species ✔
concern that power over farming is concentrated in hands of multinationals
OR
dependent on multinationals ✔
labelling differences between countries «means informed choice not possible» ✔
Accept “outcrossing”.