O Level Biology 5090 Revision Guide | PDF | Digestion | Blood - Scribd
For topics like "The Heart" (5090 Section 6), do not write walls of text. Draw a simple heart, label the four chambers, valves, and direction of blood flow. Then write three differences between pulmonary and systemic circulation. Annotate your drawing with arrows and short captions. biology o level 5090 notes better
💡 Cambridge examiners look for precise scientific terminology (like "partially permeable membrane" or "denatured") rather than vague descriptions. 🔬 Strategies to Make Your Notes Better O Level Biology 5090 Revision Guide | PDF
| Process | Definition | Direction | Energy? | Example | |---------|------------|-----------|---------|---------| | | Net movement of molecules from high → low concentration | Down gradient | No | O₂ into blood | | Osmosis | Net movement of water molecules across a partially permeable membrane from high water potential → low water potential | Down water potential gradient | No | Water into root hair | | Active transport | Movement of molecules against concentration gradient | Up gradient | Yes (ATP) | Mineral ions into roots; glucose into kidney tubules | Annotate your drawing with arrows and short captions
The 5090 syllabus is specific. "Better" notes are those that are strictly mapped to the .
Cambridge 5090 has predictable "heavy hitters." These topics appear in every exam session, often across multiple papers. Your notes must be exceptionally tight here.