Summary

• Description:

  The MS Word document comprises MASENO SCHOOL 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 Form 4 Biology Paper 2 theory examination.

  This paper assesses in-depth comprehension of genetics, animal and plant fluid dynamics, population estimation techniques, human circulatory adaptations, and homeostatic regulation.

  • Total Marks: 80 marks
  • Structure: Section A (40 marks, five compulsory structured questions) and Section B (40 marks, compulsory data analysis Question 6 and an essay choice between Question 7 and Question 8)

  It covers the following topics:

  • Section A:
    • Non-Mendelian genetics: Incomplete dominance crosses (pink flower inheritance) and human traits governed by multiple alleles
    • Cell physiology: Osmotic responses of mammalian red blood cells (crenation and haemolysis) and plant cells in hypotonic and hypertonic environments
    • Microcirculation: Capillary exchange mechanisms, ultrafiltration, tissue fluid formation, and metabolic gas exchange
    • Taxonomy and ecology: Morphological diagnostic features of Phylum Arthropoda (Class Insecta) and Lincoln index mark-release-recapture calculations
    • Respiratory physiology: Carbon dioxide exhalation tests using limewater, anaerobic respiration in muscles, and thermal pasteurization of milk
  • Section B:
    • Enzyme kinetics: Graphical plotting of reaction rate against temperature, optimum temperatures, denaturation mechanisms, and gastric enzyme pH regulation
    • Circulatory system adaptations: Comprehensive structural and functional adaptations of the mammalian heart
    • Haemostasis: Enzymatic cascade of blood clotting (thromboplastin, prothrombin, thrombin, and fibrin mesh)
    • Homeostasis: Liver carbohydrate metabolism and insulin-driven blood glucose regulation
    • Plant excretory products: Economic and physiological significance of tannins, resins, latex, caffeine, and quinine
• File Size:

  646.07 KB
• Length:

  8 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  Biology
• Posted By:

  Caleb_Peter

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