5090 Notes Better Work | Biology O Level

High-quality biology notes for the Cambridge O Level (5090) syllabus must be clear, structured, and focused heavily on exam keywords. To make your O Level Biology notes significantly better, focus on active recall strategies and specific formatting rules.

Question: Explain, in terms of the "lock and key" hypothesis, why amylase cannot digest proteins. [2 marks] biology o level 5090 notes better

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Quick Reference: Common Practical Tips

• Show working for calculations (concentration, rate, percentage change).
• Label graphs with title, axes with units; plot points accurately and draw best-fit lines.
• For experimental descriptions, include apparatus, variables, method outline, and safety considerations.