Summary

• Description:

  The MS Word document comprises Kimaeti Sub-County Muslim Schools Joint Biology Paper 2 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 231/2 mock examination.

  This paper assesses high-level analytical reasoning, data interpretation, physiological calculations, and extended biological explanations. It provides candidates with comprehensive practice on structured genetics problems, graphical analysis, and mammalian physiology.

  • Duration: 2 Hours
  • Total Marks: 80 marks
  • Number of Questions: 8 questions (Questions 1 to 8)
  • Structure: Section A (40 marks) consists of 5 compulsory structured questions (Questions 1–5, each carrying 8 marks); Section B (40 marks) consists of Question 6 (compulsory data and graph work, 20 marks) and a choice between Question 7 and Question 8 (20 marks).

  It covers the following topics:

  • Section A:
    • Plant physiology: Factors affecting transpiration rates, potometer measurements, and xerophytic stomatal adaptations
    • Genetics: Monohybrid crosses involving sickle cell anaemia, sickle cell trait, and natural selection against malaria
    • Cell physiology: Osmosis investigation across semi-permeable visking tubing and effects of high temperatures on cell membranes
    • Reproduction in plants: Pollen tube germination, double fertilization, parthenocarpy, and adaptations preventing self-fertilization
    • Support and locomotion: Anatomy of the mammalian hip (ball and socket) joint, synovial fluid functions, and skeletal versus visceral muscle tissues
  • Section B:
    • Photosynthesis and respiration: Graphical plotting and analysis of carbon (IV) oxide consumption and release, compensation point, and temperature effects
    • Human nutrition and digestion: Structural and physiological adaptations of ileum villi for nutrient absorption
    • Plant physiology: Photosynthetic theory of stomatal opening and closing mechanisms in guard cells
    • Excretion and osmoregulation: Renal ultrafiltration mechanisms across the glomerulus and Bowman's capsule
    • Environmental biology: Causes, ecological impacts, and control strategies of aquatic pollution
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY

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