Leaving Cert Biology 2025

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

Higher Level

Section A&BSection CMarking 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

Section A&BSection CMarking 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

Revise Biology by topic

Scientific Method & the Study of LifeFood & BiomoleculesEcology & the EnvironmentCell Structure & DiversityEnzymes, Metabolism & Membrane TransportPhotosynthesis & RespirationCell Continuity: Cell DivisionGenetics, DNA & EvolutionDiversity of Organisms & MicrobiologyPlant BiologyHuman Nutrition, Digestion, Circulation & DefenceBreathing, Excretion & HomeostasisHuman Responses: Nervous, Senses, Endocrine & MusculoskeletalHuman Reproduction
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Questions come from the official State Examinations Commission papers. Every link opens the original PDF on examinations.ie.