| Date | November 2017 | Marks available | 1 | Reference code | 17N.1.SL.TZ0.10 |
| Level | Standard level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Identify | Question number | 10 | Adapted from | N/A |
Question
For which discovery about DNA do Watson and Crick receive credit?
A. DNA is the molecule that genes are made of.
B. The amount of adenine equals the amount of thymine in an organism.
C. Phosphate–pentose bonding along the nucleotide backbone is covalent.
D. The shape of DNA is a double helix.
Markscheme
D
Examiners report
[N/A]
