Comprehensive revision guides packed with worked examples, practice questions, and proven exam techniques.
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Unlock top marks by mastering how a single change in a DNA base can have catastrophic effects on a protein's structure and function. This guide breaks down the complete causal chain, from mutation to non-functional enzyme, giving you the precise language and exam technique AQA rewards.
Master OCR A-Level Biology's Populations topic (7.2) with this comprehensive guide. We'll break down carrying capacity, predator-prey cycles, and the Lincoln Index to help you secure top marks in your exam.