Summary

• Description:

  The PDF document comprises Navakholo Joint Evaluation Test 1 Biology Paper 2 March 2026 Pre-Mock Exam with Marking Scheme. The marking scheme is in a different document.

  It was a KCSE Biology Paper 2 examination. This paper tests higher-order biological reasoning through structured questions on transport in plants, genetics, respiration, ecology, and physiology, requiring data interpretation, graph analysis, and extended essay writing.

  • Month Administered: March 2026
  • Duration: 2 hours
  • Total Marks: 80
  • Number of Questions: 8 (Questions 1–5 in Section A; Questions 6–8 in Section B)
  • Structure: Section A (Questions 1–5, 8 marks each, 40 marks) — answer all; Section B — Question 6 compulsory (20 marks), plus either Question 7 or 8 (20 marks)

  It covers the following topics:

  • Section A
    • Osmosis and active transport — ion uptake in lettuce plants (sodium and iodine ions, ATP inhibition, freshwater fish in marine habitat)
    • Skull photograph analysis — mode of feeding, jaw articulation, chemical vs. mechanical digestion
    • Lactic acid concentration graph during strenuous exercise — anaerobic respiration, oxygen debt, lactic acid accumulation prevention
    • Genetics of dog hair length — genotype determination, Punnett square cross, identifying homozygous offspring
    • Ecology — quadrat limitations, mark-recapture method (grasshopper population estimation), population calculation
  • Section B
    • Question 6 (Compulsory) — Transpiration: stomata distribution table analysis, plant habitat identification (xerophyte, aquatic, mesophyte), magnification change effect on stomata count, transpiration rate factors (wind, humidity), significance of transpiration, stomata modifications in leaf L
    • Question 7 — Transport of respiratory gases (O₂ and CO₂) to and from tissues in mammals
    • Question 8 — Xerophyte adaptations; role of enzymes in human digestion
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY

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