Biology 9700 Practical Notes Jun 2026

Use neat, ruled lines. The independent variable goes in the first column. Include units only in the headings, never in the body (e.g., Temperature / °C ).

You will not calculate these by hand in Paper 5, but you must know which test to use and why . biology 9700 practical notes

You will often be asked to identify sources of error and suggest improvements. Error vs. Mistake: Use neat, ruled lines

: Ensure consistent amounts of reagents using a graduated pipette or burette. Dilution Techniques : You will not calculate these by hand in

You must be ready to perform and interpret the results of standard tests: Benedict’s Test: For reducing sugars (semi-quantitative via color scale). Non-reducing Sugars: Requires hydrolysis with and neutralization with NaHCO sub 3 before re-testing. Biuret Test: For proteins (look for a purple color change). Iodine Test: For starch. Emulsion Test: For lipids using ethanol. 4. Data Presentation and Evaluation