Summary

• Description:

  The PDF document comprises BUNTRA Joint Examination Biology Paper 3 2025 Mock Exam with Marking Scheme.

  It is a 231/3 Biology Paper 3 (Practical) BUNTRA Exams 2025 examination.

  • Duration: 1¾ Hours
  • Total Marks: 40
  • Number of Questions: 3 (Questions 1–3)
  • Instructions: Answer all the questions in the spaces provided. Spend the first 15 minutes reading the whole paper before commencing work.
  • Marking Scheme: The marking scheme is in a different document.

  It covers the following topics:

  • Practical biology skills using specimens (comparing specimens P and Q; identifying the flower parts they developed from)
  • Biological drawing and labelling (longitudinal section of specimen P and functions of labelled structures)
  • Food tests/biochemical testing (preparing a solution from specimen Q and carrying out appropriate reagent tests with observations and conclusions)
  • Plant responses/tropisms (stimulus in Plant K1; response investigated in Plant K2; suggesting a control set-up)
  • Role of auxins in plant responses and the biological value of the responses shown by Plant K1 and Plant K2
  • Arthropod life cycle (identifying stages, naming previous and later stages, and naming the complete life cycle)
  • Gaseous exchange in arthropods (system used and a visible feature supporting it)
  • Feeding adaptations at the larval stage and significance of the pupal stage in the life cycle
  • Adaptations for locomotion in the adult arthropod stage
  • Hormonal control of metamorphosis (roles of juvenile hormone and moulting-stimulating hormone)
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY

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