Biology 9700 Practical Notes Free May 2026

It takes 5 minutes but prevents mistakes later.

What you keep the same (e.g., temperature, pH). Experimental Errors: Systematic: Faulty equipment (e.g., a thermometer that is 2∘2 raised to the composed with power biology 9700 practical notes

Add Biuret reagent. Positive result: Blue → Purple/Violet. It takes 5 minutes but prevents mistakes later

Random: Difficulty in judging a color change (end-point). Use a colorimeter or a standard color chart to improve this. 💡 Quick Tips for Exam Day Positive result: Blue → Purple/Violet

on the X-axis; Dependent on the Y-axis. Use at least 50% of the grid provided.

You must know the reagents and the specific color changes for biological molecules. 🍱 The Big Four Tests

Draw only the tissue layers (e.g., epidermis, xylem, phloem). No shading or sketching allowed. . Ensure units are converted to micrometers ( ) before calculating. 🧪 Core Skill 2: Biochemical Testing