AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
When a newly formed DNA copy contains an error, two outcomes are possible:
Source: Chapter 7, Section 7.1
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The question directly tests the passage in Section 7.1. Examiners expect both outcomes to be named clearly — one negative (cell dies) and one positive (cell survives but is different). Use the textbook's own language ("cannot work with the cellular apparatus," "subtly different") for full marks. Mentioning that surviving variations are the basis of evolution adds accuracy but keep it brief for a 2-mark answer.