Summary

• Description:

  The MS Word document comprises MOKASA I Joint Examination Biology Paper 1 2025 Mock Exam with Marking Scheme. The PDF version is also available upon your request. This document contains the full marking scheme.

  It is a KCSE Biology (Theory) Paper 1 (231/1) examination.

  • Duration: 2 Hours
  • Total Marks: 80
  • Number of Questions: 34 (Questions 1–34)
  • Marking Scheme: The marking scheme is provided in this document.

  It covers the following topics:

  • Specimen collection and Classification (Taxonomy, modern vs. artificial classification)
  • Kingdom Monera (Characteristics of bacteria)
  • Ecology (Abiotic factors, adaptations for predation, and pollution effects)
  • Pathology and Immunology (Disease control, amoebic dysentery, allergies, and anaphylaxis)
  • Photosynthesis and Respiration (Analysis of CO2 concentration graphs)
  • Gaseous Exchange (Respiratory surfaces in aquatic larvae, insects, and plants)
  • Transport in Plants (Translocation, functions of xylem and phloem, and transpiration experiments)
  • Homeostasis (Insulin function, positive vs. negative feedback, and thermoregulation definitions)
  • Genetics (Sex-linked traits/colour blindness and mutations)
  • Cell Physiology (Diffusion, osmosis, active transport, and surface area to volume ratio)
  • Evolution (Adaptive radiation, fossil records, and Lamarck’s theory)
  • Growth and Development (Plant hormones like Gibberellins and Ethylene)
  • Digestion (Role of Cholecystokinin and smooth muscles)
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY

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