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For official past papers and examiner reports, refer to (Past Papers section) or your local examination board’s 2020 practical series.
Candidates investigated how temperature affects the leakage of red pigment through the cell membranes of beetroot cylinders. Observation
Observation : The water-bath at 80°C shows the highest intensity of red coloration.
Each student set up their own experiment, using a similar method: o level biology practical 2020 answers
: Making a transverse section drawing of a lime fruit and identifying differences between 2020 O' Levels 6093/3 - Recommended Answers | PDF - Scribd
Rate of transpiration increases with temperature, air movement, and light intensity; decreases in high humidity.
Use a to maintain temperature instead of just adding hot water. For official past papers and examiner reports, refer
Acid Treatment (pH 2) : The banana slice remained creamy yellow because the highly acidic environment denatured the polyphenol oxidase enzymes, rendering them inactive.
October/November 2020 (Paper 5090/6 or Equivalent variants) Difficulty Rating: Moderate to Challenging
The GCE O-Level Biology Practical Examination demands a unique blend of theoretical knowledge, precise laboratory technique, and sharp analytical skills. This comprehensive guide breaks down the core components of the 2020 Biology Practical exam, provides detailed walkthroughs of the experimental setups, and analyzes the answers to help students understand exactly what examiners look for. 💡 Overview of the 2020 Biology Practical Exam Each student set up their own experiment, using
If your drawing measures 30 mm and the actual specimen is 10 mm, the magnification is ×3cross 3 4. Sources of Error and Improvements
Remember that consistent practice with past papers—and careful self-assessment using the mark schemes—is the most effective way to prepare for the O Level Biology practical component. Good luck with your studies!
