Keep a quick-reference matrix of standard food tests memorized: Reagent Used Initial Color Positive Result Color Benedict's Solution (Heat required) →right arrow →right arrow Starch Iodine Solution Yellow-Brown Blue-Black Protein Biuret Reagent Violet / Purple Fats/Lipids Ethanol Emulsion Test Cloudy White Emulsion 4. Exam Techniques for High Marks

Read a section of your notes, close the binder, and write down everything you can remember on a blank piece of paper. Reopen your notes and use a red pen to fill in the missing details or corrections.

Balanced diet components, deficiency diseases, and the importance of water.

(In words) Stimulus → Receptor → Sensory neurone → Relay neurone → Motor neurone → Effector → Response.

Scientific accuracy in definitions is critical for full marks.

Write long answers in concise, numbered bullet points. Examiners find organized points easier to mark than dense blocks of text.

A group of organisms that can reproduce to produce fertile offspring. Excretion:

Effective biology notes for the Cambridge O Level (5090) syllabus must bridge the gap between simple definitions and the complex application of concepts .

For each section of your notes (e.g., Section 4 – Transport in Plants), do this: