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Science (086) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [2] medium thorough-understanding
A newly formed DNA copy contains an error in the sequence of its nucleotides. What are the two possible outcomes for the cell that inherits this copy?
Generated by claude-sonnet-4-6 · 2026-06-26 01:03 · grounding rag
Model Answer

When a newly formed DNA copy contains an error, two outcomes are possible:

  1. Cell death: The variation may be so drastic that the new DNA copy cannot work with the inherited cellular apparatus, causing the cell to simply die.
  2. Survival with variation: The error may be minor, allowing the cell to survive but be subtly different from the parent cell. Such variations form the basis of evolution.

Source: Chapter 7, Section 7.1

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Explanation

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.

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.