Summary

• Description:

  The MS Word document comprises Kimaeti Sub-County Muslim Schools Joint 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 231/1 mock examination.

  This paper tests broad theoretical concepts across the secondary biology syllabus, covering cytology, physiology, genetics, ecology, and taxonomy. It delivers a fast-paced assessment of fundamental biological concepts and scientific terminology.

  • Duration: 2 Hours
  • Total Marks: 80 marks
  • Number of Questions: 29 questions (Questions 1 to 29)
  • Structure: Single compulsory paper containing 29 short-answer and structured questions totaling 80 marks.

  It covers the following topics:

  • Cellular respiration: Products of anaerobic respiration in industrial brewing and baking
  • Human health, immunology, and vaccines against viral and bacterial diseases
  • Excretory system: Urinalysis, diabetes mellitus indicators, and kidney functions
  • Coordination and nervous transmission: Motor neuron structure, myelin sheath, and impulse pathways
  • Irritability and behavioral response: Phototactic and negative phototactic responses in microorganisms and larvae
  • Classification and taxonomy: Arthropod class characteristics and economic importance of kingdom Fungi
  • Plant anatomy: Meristematic tissues responsible for secondary growth in dicots
  • Genetics: Chromosome numbers in vegetative cells, egg cells, and endosperm tissue
  • Ecological apparatus: Identification and use of pitfall traps and pooters in specimen collection
  • Molecular genetics: Complementary DNA base pairing and transcription to messenger RNA (m-RNA)
  • Hematology and cell biology: Polymorphonuclear phagocytes and role of lysosomes
  • Organic evolution: Evidence of organic evolution, fossil records, and antibiotic resistance mechanisms
  • Ecology: Biotic factors influencing wildlife populations and ecological energy flow models
  • Seed physiology: Epigeal germination mechanisms and role of the hypocotyl
  • Photosynthesis: Photochemical factors influencing photosynthesis and light-independent reaction products
  • Applied biology: Environmental conservation and observable characteristics of living organisms
  • Gas exchange and respiration: Insect respiratory spiracles and plant gaseous exchange sites
  • Inorganic and organic pathology: Causative agents of cholera and malaria
  • Locomotion: Fin adaptations in bony fish to prevent yawing, pitching, and rolling
  • Binomial nomenclature: Genus and species naming conventions in legumes
  • Excretion and osmoregulation: Urea synthesis (deamination) in liver and nitrogenous waste in reptiles/birds
  • Dermatology: Thermoregulatory and excretory functions of sweat in mammals
  • Nutrition: Dietary vitamin deficiencies related to oral health and gingivitis
  • Experimental genetics: Advantages of using Drosophila melanogaster in inheritance studies
  • Cell physiology: Osmotic dynamics, plasmolysis in hypertonic solutions, and deplasmolysis
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY

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