Biological molecules — Difficult
Transfer your understanding to a changed context, justify decisions and check your reasoning. No hints during the test.
Includes extension practice
The listed molecules and four food tests are required. DCPIP vitamin-C testing, DNA double-helix structure and base-pair calculations in this shared set are additional biology content.
Easy, Normal and Difficult describe practice demand; they are not the official Core and Extended tiers.
- Cambridge 0653 syllabus2028–2029 · B4.1.1–3
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