Summary

• Description:

  The PDF document comprises The Elites Jet Biology Paper 1 2025 Mock Exam with Marking Scheme.

  It is a 231/1 Biology Paper 1 Pre-Mock (March 2025) examination.

  • Duration: 2 Hours
  • Number of Questions: 30 (Questions 1–30)
  • Marking Scheme: The marking scheme is included in this document.

  It covers the following topics:

  • Ecology fieldwork and sampling methods (e.g., pitfall trap and baiting)
  • Microscope use and focusing errors
  • Human respiratory adaptations (nasal cavity features and gas exchange surfaces)
  • Immunity and disease control (phagocytosis, antibodies, malaria factors, HIV and other STIs)
  • Genetic disorders and circulation (sickle cell anaemia and related pain)
  • Evidence for common ancestry (shared cellular compounds such as DNA and ATP)
  • Plant growth regulators (abscisic acid and gibberellins)
  • Plant gaseous exchange structures (lenticels) and transport tissues
  • Cell cycle and meiosis stages (interphase and prophase I)
  • Digestion and pH (stomach conditions)
  • Osmoregulation in unicellular organisms (contractile vacuoles in amoeba)
  • Human reproduction and hormones (menstrual cycle control; signs of labour)
  • Respiration investigations using indicators (carbon(IV) oxide and bicarbonate indicator)
  • Plant uptake and transport (water and mineral salts/ions)
  • Transplant rejection and immunity (xenografts)
  • Ecological relationships (competition and predation)
  • Genetics and inheritance (Drosophila as a model organism; monohybrid cross outcomes)
  • Classification (Crustacea and Arachnida)
  • Thermoregulation and insulation (fur functions)
  • Fruit structure and adaptations (mesocarp/exocarp features)
  • Homeostasis after exercise (lactic acid oxidation, heat production, sweating)
  • Transpiration experiments (cobalt(II) chloride paper method and conditions affecting transpiration)
  • Plant groups comparison (angiosperms vs gymnosperms: seeds and vascular tissues)
  • Photosynthesis (chlorophyll and leaf adaptations for efficient photosynthesis)
  • Laboratory treatment of living tissues (boiling and acid treatment)
  • Proteins and body defence/structure (antibodies and keratin)
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY

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