Summary

• Description:

  The PDF document comprises Navakholo Joint Evaluation Test 1 Biology Paper 3 March 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' ability to conduct biological investigations, test food substances, observe microorganisms under a microscope, and identify plant specimens through hands-on laboratory procedures.

  • Month Administered: March 2026
  • Duration: 1¾ hours (25th March 2026, 8.00am–9.45am)
  • Total Marks: 40
  • Number of Questions: 3 (all compulsory)
  • Structure: Question 1 (18 marks), Question 2 (10 marks), Question 3 (12 marks)

  It covers the following topics:

  • Question 1 — Enzyme-Oxygen Reaction in Banana Peel
    • Investigating enzyme activity on exposed banana peel surfaces using dilute HCl, distilled water, and an empty beaker
    • Recording and accounting for observations in each beaker (inhibition by acid, enzyme activity in water and open air)
    • Exposing peels on a white tile for further observation
    • Effect of boiling on enzyme activity; suitable pH of banana peel enzymes
  • Question 2 — Food Testing and Fermentation
    • Food test on solution X (Benedict's test — reducing sugars)
    • Setting up a fermentation experiment (solution X + substance Y in a water bath at 37°C)
    • Observation and conclusion; naming the process and word equation
    • Microscope observation of fermentation products — drawing and labelling organisms
    • Identification of substance Y
  • Question 3 — Plant Specimen Identification
    • Identifying subdivision of specimens A, B, and C with reasons
    • Classifying specimens A and B to class level with reasons
    • Comparing leaves of specimens A and C
    • Adaptations of specimen A to its habitat
    • Identifying the stem type of specimen C
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY

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