Summary

• Description:

  The MS Word document comprises LENANA SCHOOL NAIROBI INTERNAL EXAMS Biology Paper 3 2026 Mock Exam with Answers (Marking Scheme). The PDF version is also available upon your request. The marking scheme is in a different document.

  It was a KCSE Biology Paper 3 examination.

  This practical examination evaluates experimental design, data collection, enzyme action, and botanical classification. It tests student laboratory proficiencies in biochemical testing, leaf surface area calculation via grid estimation, and morphological adaptations of lower and higher plants.

  • Number of Questions: 3 (Questions 1-3)
  • Structure: Compulsory practical questions covering experimental physiology, morphology, and specimen photography.

  It covers the following topics:

  • Enzymology practicals: Hydrogen peroxide decomposition using tissue extracts and investigating the effect of heat denaturation on enzymes
  • Botanical surface analysis: Leaf area determination using grid tracing and leaf structural adaptations
  • Plant reproduction: Structural contrivances that prevent self-pollination (protandry/protogyny and floral morphology)
  • Plant taxonomy and comparative morphology: Division Bryophyta (mosses) and Pteridophyta (ferns), including rhizoids, sori, and reproductive structures
• File Size:

  1.19 MB
• Length:

  8 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  Biology
• Posted By:

  Caleb_Peter

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