| Date | November 2011 | Marks available | 1 | Reference code | 11N.1.SL.TZ0.10 |
| Level | Standard level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 10 | Adapted from | N/A |
Question
This question refers to the following diagram of DNA.
What does the structure labelled X represent?
A. Hydrogen bond
B. Phosphate
C. Covalent bond
D. Base
Markscheme
C
Examiners report
N/A
Syllabus sections
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