Biology 5090/32 Oct Nov 2024 | Cambridge O-Level Past Papers With Mark Scheme

1. Food Tests & Biochemical Reactions | Starch test using iodine, Benedict’s test for reducing sugars, Biuret test for proteins, preparation of samples, and avoiding cross-contamination.

2. Photosynthesis & Oxygen Measurement | Investigating oxygen production as a measure of photosynthesis, effects of light wavelengths, experimental setup using aquatic plants.

3. Data Handling & Graphical Analysis | Recording observations, calculating means, constructing bar charts, interpreting trends in photosynthesis.

4. Experimental Design & Scientific Method | Planning an investigation on light intensity effects, controlling variables, ensuring reliability, and improving experimental accuracy.

5. Biological Drawing & Identification | Observing insect morphology, making accurate biological drawings, measuring specimens, and using dichotomous keys for species classification.