Summary

• Description:

  The PDF document comprises BRISTAR JOINT Biology Paper 3 2026 Mock Exam with Answers (Marking Scheme). The marking scheme is in a different document.

  It was a KCSE Biology 231/3 examination.

  This practical examination evaluates experimental and observational skills including botanical taxonomy, anatomical transverse sections, ecological photograph analysis, enzyme kinetics, and biochemical food tests.

  • Month Administered: July-2026
  • Duration: 1 Hour 45 Minutes
  • Total Marks: 40 Marks
  • Number of Questions: 3 (Questions 1 – 3)
  • Structure: Three compulsory practical questions (Question 1: 11 marks, Question 2: 12 marks, Question 3: 17 marks).

  It covers the following topics:

  • Plant Anatomy and Morphology (taxonomic classification of plant specimens, xerophytic adaptations, leaf vein network analysis, stem plan diagram, xylem transport tracing, and root endodermis physiology)
  • Ecology and Animal Behavior (predation dynamics at river crossings, crocodile morphological adaptations, ecological hierarchy terminology, food chain construction, and herd anti-predator strategies)
  • Enzyme Physiology, Seed Anatomy, and Food Biochemistry (catalase activity and heat denaturation in animal tissues, seed embryo morphology and germination requirements, qualitative food testing)
• File Size:

  1.15 MB
• Length:

  9 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY
• Posted By:

  Caleb_Peter

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