Summary

• Description:

  The MS Word document comprises Mumias West Sub-County Joint Evaluation Biology Paper 3 May 2026 Pre-Mock Exam with Marking Scheme. The marking scheme is in a different document.

  It was a KCSE Biology Paper 3 (Practical) examination. This paper assesses candidates' practical laboratory skills, including experimental design, microscopy, specimen identification, and ecological sampling, requiring hands-on investigation of physiological and ecological phenomena.

  • Month Administered: May 2026
  • Duration: 1¾ hours (including 15 minutes reading time)
  • Total Marks: 40
  • Number of Questions: 3
  • Structure: Question 1 (17 marks), Question 2 (12 marks), Question 3 (11 marks) — all compulsory

  It covers the following topics:

  • Question 1 — Practical Experiment
    • Yeast fermentation experiment (substance identification, physiological process, conclusions)
    • Microscopy — preparation of temporary slides using methylene blue staining
    • Drawing and labelling of specimen under light microscope
    • Magnification calculation
    • Fine adjustment and focusing techniques
    • Asexual reproduction in yeast (binary fission/budding)
  • Question 2 — Specimen Work
    • Ecological specimen identification (apparatus used for collection, trophic level, type of skeleton)
    • Photograph-based specimen identification
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY

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