: Don't just check if you are right; look for the "keywords" the examiners want. ZIMSEC marking schemes often award marks for specific scientific terms (e.g., "denature" instead of "break down").
The Biology Green Book typically covers a range of exam sessions (e.g., from the early 2000s to the most recent years). It is structured to help students master the three major exam papers: Paper 1 (Multiple Choice): Zimsec Biology Green Book Pdf
If you'd like, I can help you (like Respiration or Genetics) or explain a past exam question you're struggling with. Zimsec Biology O Level Greenbook | PDF - Scribd : Don't just check if you are right;