Leaving Cert Biology 2025

The 2025 Leaving Cert Biology exam paper and official marking scheme, free below as direct PDF links from the State Examinations Commission archive.

Higher Level

Exam PaperMarking Scheme
What's in the 2025 Higher Level paper?
  • Q1 food, biomolecules, proteins, vitamins · 20 marks
  • Q2 plant biology, root structure, tissues, mitosis · 20 marks
  • Q3 respiration, aerobic respiration, anaerobic respiration, atp · 20 marks
  • Q4 cell membrane, cell ultrastructure, prokaryotes, plant cells · 20 marks
  • Q5 microbiology, bioprocessing, bacterial growth, bioreactor · 20 marks
  • Q6 digestion, human nutrition, enzymes, villus · 20 marks
  • Q7 scientific method, hypothesis, experimental design · 20 marks
  • Q8 ecology, ecosystem, fieldwork, abiotic factors · 30 marks
  • Q9 osmosis, diffusion, cell membrane, laboratory activity · 30 marks
  • Q10 microbiology, yeast, fungi, laboratory activity · 30 marks
  • Q11 plant reproduction, tropisms, flowering plants, seeds · 60 marks
  • Q12 genetics, mutation, dna, inheritance · 60 marks
  • Q13 photosynthesis, metabolism, enzymes, chloroplast · 60 marks
  • Q14 nervous system, senses, neurons, eye and ear · 60 marks
  • Q15 ecology, predator-prey, food chains, nitrogen cycle · 60 marks
  • Q16 fungi, gas exchange, cell cycle, lymphatic system · 60 marks
  • Q17 circulation, skeleton, homeostasis, human reproduction · 60 marks

Ordinary Level

Exam PaperMarking Scheme
What's in the 2025 Ordinary Level paper?
  • Q1 biomolecules, carbohydrates, lipids, vitamins · 20 marks
  • Q2 ecology, ecosystem, biosphere · 20 marks
  • Q3 true or false, general biology · 20 marks
  • Q4 cell biology, cell components · 20 marks
  • Q5 plant biology, tropisms, plant growth regulators · 20 marks
  • Q6 nervous system, endocrine system, sense organs · 20 marks
  • Q7 mitosis, cell division, meiosis · 20 marks
  • Q8 biomolecules, food tests, experimental · 30 marks
  • Q9 enzymes, experimental, ph · 30 marks
  • Q10 germination, seeds, experimental, plant biology · 30 marks
  • Q11 ecology, food chains, nutrient cycles, adaptations · 60 marks
  • Q12 genetics, dna, rna, genetic engineering · 60 marks
  • Q13 photosynthesis, respiration, metabolism · 60 marks
  • Q14 plant biology, transport, reproduction in plants · 60 marks
  • Q15 human reproduction, menstrual cycle, hormones · 60 marks
  • Q16 enzymes, genetics, fungi, microbiology · 60 marks
  • Q17 circulatory system, skeletal system, breathing system, immune system · 60 marks
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All PDFs open on the State Examinations Commission archive (examinations.ie). ExamAI links to them; we don't host or alter them.