D1.2.2—Hydrogen bonding in transcription Topic Practice
D1.2.2—Hydrogen bonding in transcription Topic Practice

IB Biology syllabusBiology SL/HLFirst assessment 2025
Practise deriving mRNA or DNA strand sequences from given bases, using direction, antisense or sense strand information and base pairing rules.
How this is tested
- calculate the mRNA sequence from a DNA template using A-U and G-C pairing
- distinguish sense and antisense strands when matching DNA and mRNA sequences
- interpret 3' and 5' direction in multiple-choice transcription sequence questions
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