Summary

• Description:

  The PDF document comprises Arise and Shine Trial 2 Biology Paper 1 2026 Pre-Mock Exam with Marking Scheme. The marking scheme is in a different document.

  It was a KCSE Biology Paper 1 examination assessing foundational concepts across cellular biology, physiology, human anatomy, genetics, and ecology. It provides standard short-answer revision practice complete with marking scheme reference for KCSE Form 4 candidates.

  • Month Administered: July 2026
  • Duration: 2 Hours
  • Total Marks: 80
  • Number of Questions: 25 (Questions 1-25)
  • Structure: Single compulsory section containing 25 structured short-answer questions

  It covers the following topics:

  • Nutrition differences in plants and animals, and maggot taxis responses
  • Organelle functions (ribosome synthesis, lipid transport, protein packaging)
  • Eye defects (myopia / short-sightedness and optical correction)
  • Neuron structure, identification, and impulse transmission
  • Vestigial structures in humans and scientific critiques of Lamarckism
  • Causative agents of human diseases (amoebic dysentery, pneumonia, syphilis)
  • Pyramids of numbers and trophic level organization
  • Ecological definitions (interspecific competition and carrying capacity)
  • Mammalian skeleton (femur anatomy, pelvic girdle articulation, and hinge joints)
  • Lignified plant support tissues and skin pigmentation mutations (albinism)
  • Alleles, sex-linked inheritance in males, and arthropod growth patterns (ecdysis)
  • Respiratory quotient (RQ) calculations and lipid substrate utilization
  • Osmotic response experiment using sugar crystals and plant tissues
  • Maternal nutrition requirements during pregnancy and hormonal roles of progesterone
  • Embryo sac structure, double fertilization, and interspecific hybrid sterility
  • Lipid emulsification in the human alimentary canal
  • Excretory frequency in varying temperatures, nitrogenous wastes in fish, alveolus adaptations, and blood clotting significance
  • Malaria eradication challenges in Africa and biological carbohydrates
• File Size:

  1.03 MB
• Length:

  6 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  BIOLOGY
• Posted By:

  Caleb_Peter

Enter your details below to initiate a payment using MPESA.