Master IB Biology SL/HL D1.3 Gene Knockout and A2.3 Viruses with these concise, exam-focused notes covering gene knockout techniques, CRISPR-Cas9, applications of genetic engineering, virus structure, bacteriophages, lytic and lysogenic cycles, retroviruses, HIV, and viral reproduction strategies. Includes clear diagrams, real-world examples, and syllabus-aligned explanations designed for efficient revision and success in Papers 1 and 2. Perfect for quick revision and last-minute exam preparatio...