Mastering the Biology 9700 Practical (Paper 3) Scoring an A in AS Level Biology often hinges on . This practical exam tests your ability to follow instructions, collect data, and analyze results under pressure. 🔬 Core Skill 1: Microscopic Techniques
Add Biuret reagent. Positive result: Blue → Purple/Violet.
You must know the reagents and the specific color changes for biological molecules. 🍱 The Big Four Tests
It takes 5 minutes but prevents mistakes later.
Contamination is the number one cause of "weird" results. Check your units: Are you measuring in cm3c m cubed mm3m m cubed ? Converting correctly is vital.
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