Summary

• Description:

  The MS Word document comprises BRISTAR 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 examination.

  This paper tests advanced analytical competencies in biological sciences, including biochemical pathways, sex-linked genetics, physiological adaptation, homeostatic regulation, and reproductive biology.

  • Month Administered: July - 2026
  • Duration: 2 Hours
  • Total Marks: 80 Marks
  • Number of Questions: 8 (Questions 1 – 8)
  • Structure: Section A (40 marks, questions 1–5, all compulsory), Section B (40 marks, question 6 compulsory data analysis and graph plotting, with an essay choice between question 7 or 8).

  It covers the following topics:

  • Section A:
    • Plant Biochemistry (photosynthesis chemical equations, site of reaction, and biological importance)
    • Genetics (multiple allelism, sex-linked inheritance of haemophilia, chromosomal non-disjunction disorders)
    • Circulatory and Respiratory Physiology (high-altitude blood cell adaptation, respiratory gas transport, and carbonic anhydrase function)
    • Support and Movement (mammalian lumbar vertebra structure and adaptations, parenchyma support in plants, tendon vs ligament functions)
    • Ecology (food web dynamics, trophic levels, energy transfer losses, and interspecific feeding relationships)
  • Section B:
    • Homeostatic Regulation and Data Analysis (blood glucose regulation curves, pancreatic and hepatic feedback loops, diabetes mellitus)
    • Sensory Organs and Reception (structural and functional adaptations of the mammalian ear for hearing and equilibrium)
    • Cell Division and Plant Reproduction (comparative differences between mitosis and meiosis, detailed process of double fertilization in flowering plants)
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY
• Posted By:

  Caleb_Peter

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