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Which option correctly contrasts the named ideas for Reproduction, DNA structure (biology only): students must interpret diagrams of DNA structure without needing to reproduce them.
- A.Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches DNA structure (biology only) because students must interpret diagrams of DNA structure without needing to reproduce them.
- B.Reversed contrast: Calling a gene a whole chromosome. This would blur DNA vs genes instead of testing DNA structure (biology only).
- C.Over-broad contrast: Explaining protein coding without naming the gene as the relevant section of DNA. This misses the objective focus on interpret diagrams of DNA structure without needing to reproduce them.
- D.Unrelated contrast: It moves into a neighbouring Unit 4.6 idea rather than Reproduction / DNA structure (biology only).
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