D1.2.3—DNA template stability Topic Practice
D1.2.3—DNA template stability Topic Practice

IB Biology syllabusBiology SL/HLFirst assessment 2025
Students practise explaining how DNA’s structural features ensure faithful transcription without altering the template sequence.
How this is tested
- link complementary base pairing and sugar-phosphate backbone stability to accurate RNA synthesis during
- explain why DNA remains unchanged after transcription, referencing hydrogen bonding and enzyme action on
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