DP Chemistry (last assessment 2024)
Question 18M.3.hl.TZ2.12
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.hl.TZ2.12 |
| Level | hl | Paper | 3 | Time zone | TZ2 |
| Command term | List | Question number | 12 | Adapted from | N/A |
12.
[Maximum mark: 2]
18M.3.hl.TZ2.12
DNA is a biopolymer made up of nucleotides. List two components of a nucleotide.
[2]
Markscheme
Any two of:
pentose «sugar»
OR
deoxyribose
phosphate «group»
«organic» nitrogenous base
OR
nucleobase
OR
nucleic base
OR
purine
OR
pyrimidine
Accept names or formulas.
Accept “ribose” for M1.
Do not accept “phosphoric acid”.
Accept the four bases together: “adenine, cytosine, thymine, guanine”.
[2 marks]
