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Biological molecules: DNA replication

From Mock B · Paper 1 (topics 1–4)
3.23 marks
Bacteria were grown on a medium containing heavy nitrogen (¹⁵N), then transferred to light nitrogen (¹⁴N). DNA was extracted and centrifuged (data are illustrative, written for this paper).
Generation in ¹⁴NDNA bands
0100% heavy
1100% intermediate
250% intermediate, 50% light
Explain how these results support semi-conservative replication.
From Mock B · Paper 1 (topics 1–4)
3.32 marks
Describe the role of DNA polymerase in DNA replication.
Score 0 / 5 · 0 of 2 marked

This paper is written by Plasmo in the style of the AQA A-Level Biology exam. It is not a past paper and is not produced or endorsed by the exam board.

DNA replication Exam Questions: AQA A-Level Biology | Plasmo