Summary

• Description:

  The PDF document comprises CEKENAS Biology Paper 2 2026 Pre-Mock Exam with Marking Scheme. The marking scheme is in a different document.

  It was a CEKENAS Form 4 Biology Paper 2 theory examination focusing on complex biological processes, genetic analysis, physiological data interpretation, and essay responses. This revision paper helps candidates build analytical skills for KCSE, available as a PDF download with complete answers and marking scheme.

  • Month Administered: March/April 2026
  • Duration: 2 Hours
  • Total Marks: 80 Marks
  • Number of Questions: 8 (Questions 1–8)
  • Structure: Section A (40 marks, compulsory Questions 1–5), and Section B (40 marks, compulsory graphical Question 6 [20 marks] plus choice of essay Question 7 or 8 [20 marks]).

  It covers the following topics:

  • Section A
    • Genetics (Sickle cell heterozygote advantage, codominance in roan coat color, Human Genome Project)
    • Thermoregulation and excretion (Skin temperature response to cold fluids, aldosterone function, glomerulus adaptations, colchicine in genetic mutations)
    • Insect development and seed physiology (Moth metamorphosis, juvenile hormone function, seed germination conditions, seed dormancy)
    • Ecology and energy transfer (Biomass pyramids, aquatic food webs, ecosystem disturbance, oil spill impacts)
    • Evolutionary mechanics (Adaptive radiation, fossil record limitations, homologous vs. analogous structures, antibiotic resistance, Lamarckism evaluation)
  • Section B
    • Enzymology and data analysis (Effect of temperature on amylase activity graph interpretation, biochemical tests for proteins vs. reducing sugars)
    • Reproductive biology (Fungal reproduction mechanics, detailed angiosperm double fertilization process)
    • Human exercise physiology (Systemic effects of physical exercise on heart, lungs, kidneys, and skin)
• File Size:

  221.59 KB
• Length:

  12 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY
• Posted By:

  Caleb_Peter

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