| Date | May 2010 | Marks available | 1 | Reference code | 10M.1.SL.TZ2.8 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Identify | Question number | 8 | Adapted from | N/A |
Question
Which molecules form the nucleotide marked in the diagram?
A. phosphate, deoxyribose and nitrogenous base
B. phosphorus, ribose and nitrogenous base
C. phosphorus, deoxyribose and guanosine
D. phosphate, ribose and guanine
Markscheme
A
Examiners report
This question was a very good discriminator and was not a difficult question for most candidates. Most candidates knew the correct answer. Some weak candidates went for the answer with ribose as the sugar present in DNA.
