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Which option best identifies the exact concept boundary for Variation and evolution, Genetic engineering: students must describe bacterial cells engineered to produce useful substances such as human insulin.
- A.Definition boundary: DNA can contain many genes; a gene has a specific coding role. This matches Genetic engineering because students must describe bacterial cells engineered to produce useful substances such as human insulin.
- B.Scale confusion: Calling a gene a whole chromosome. This would blur DNA vs genes instead of testing Genetic engineering.
- C.Process confusion: Explaining protein coding without naming the gene as the relevant section of DNA. This misses the objective focus on describe bacterial cells engineered to produce useful substances such as human insulin.
- D.Evidence confusion: It moves into a neighbouring Unit 4.6 idea rather than Variation and evolution / Genetic engineering.
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