Summary

• Description:

  The PDF document comprises KALA Joint Trials Biology Paper 2 2025 Mock Exam with Marking Scheme.

  It is a KCSE Biology (Theory) Paper 2 (231/2) trial examination (July 2025).

  • Duration: 2 Hours
  • Total Marks: 80
  • Number of Questions: 8 (Questions 1–8)
  • Marking Scheme: The marking scheme is in a different document.

  It covers the following topics:

  • Plant physiology experiments (investigating physiological processes using experimental set-ups)
  • Enzymes and digestion of starch (starch–agar jelly experiment using a germinating seed and test reagent)
  • Evolution (homologous vertebrate limb; adaptations for different modes of locomotion)
  • Fossils (methods of fossilization and limitations of fossils)
  • Genetics and inheritance (blood smear interpretation of a hereditary condition and genetic cross outcomes)
  • Human physiology (alimentary canal structure; digestive processes of proteins; hormone production and function)
  • Homeostasis and thermoregulation (urine vs sweat variation with temperature; plotting graphs; role of the brain)
  • Plant responses (distinguishing taxes and tropisms)
  • Human eye (accommodation for near/far objects; regulation of light entry)
  • Support and movement (types of skeleton in organisms; adaptations of vertebrae and scapula)
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY

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