Summary

• Description:

  The MS Word document comprises LENANA SCHOOL NAIROBI INTERNAL EXAMS Biology Paper 1 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 Paper 1 examination.

  This assessment is designed to test foundational and integrated biological concepts across cell physiology, genetics, comparative anatomy, and plant physiology. It places strong emphasis on data analysis, ecological instrumentation, and physiological adaptations.

  • Total Marks: 80
  • Structure: Single compulsory theory paper consisting of short-answer and structured analytical questions.

  It covers the following topics:

  • Cell physiology: Haemolysis, plasmolysis reversal, and cell magnification calculations
  • Classification and taxonomy: Kingdom characteristics (Prokaryotae and Plantae)
  • Plant physiology: Photosynthetic gas exchange, leaf adaptations, and transpiration mechanics
  • Genetics and evolution: Synapsis, crossing over, sex-linked inheritance (haemophilia), and homologous structures
  • Ecology: Use of ecological tools (Secchi disc, pooter, pitfall trap) and capture-recapture population estimation
  • Mammalian physiology: Respiration mechanisms, blood transport of carbon (IV) oxide, ABO blood group compatibility, and comparative dentition
  • Plant reproduction and growth: Floral adaptations for wind pollination, flower sexuality, and gibberellin action in germination
• File Size:

  288.25 KB
• Length:

  10 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  Biology
• Posted By:

  Caleb_Peter

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