Free Practice Questions for Aragón PAU Biology
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Key Facts: Aragón PAU Biology Exam
90 min
Exam Time Limit
UNIZAR PAU Commission
0–10
Grading Scale
Gobierno de Aragón / UNIZAR
4.0
Min. Access Phase Score
PAU Access Rules
EUR 75.00
Ordinary Registration Fee
UNIZAR PAU inscription page 2026
6 Blocks
Basic Knowledge Syllabus Areas
2º Bachillerato Biology Curriculum
The Aragón PAU Biology exam (Biología) is organized by the PAU Organising Commission of Aragón and Universidad de Zaragoza (UNIZAR) for 2nd Bachillerato students. The 90-minute exam is scored on a 0–10 scale (minimum 4.0 required in Access Phase). Our 100-question practice set provides an English-language MCQ study tool covering the complete 2nd Bachillerato biology curriculum.
Sample Aragón PAU Biology Practice Questions
Try these sample questions to review concepts for the Aragón PAU Biology exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Which physical property of water is primarily responsible for its ability to absorb large amounts of heat energy without experiencing a drastic change in temperature?
2The upward movement of water through xylem vessels in tall plants relies on the force of attraction between water molecules and the hydrophilic cell walls of vessel elements. What is this phenomenon called?
3What primary buffer system maintains human blood plasma pH within the narrow physiological range of 7.35 to 7.45?
4When human red blood cells are placed in a concentrated (hypertonic) sodium chloride solution, water leaves the cells by osmosis. What happens to the erythrocytes?
5Which inorganic bioelement functions as an essential cofactor for chlorophyll and is required for muscle contraction and enzymatic ATP cleavage?
6Which of the following monosaccharides is structurally classified as a ketohexose?
7Which disaccharide is non-reducing because its glycosidic bond involves the anomeric carbon atoms of both constituent monosaccharides (alpha-D-glucopyranosyl-(1->2)-beta-D-fructofuranoside)?
8Which structural polysaccharide consists of unbranched chains of D-glucose molecules joined by beta-1,4-glycosidic bonds, forming rigid microfibrils in plant cell walls?
9Triacylglycerols (triglycerides) are classified as saponifiable lipids because they contain which chemical linkage between glycerol and three fatty acid chains?
10Glycerophospholipids spontaneously assemble into lipid bilayers in aqueous environments due to their amphipathic nature. Which component forms the hydrophilic polar head group?
About the Aragón PAU Biology Exam
The Aragón PAU Biology exam (Biología 2º Bachillerato) evaluates upper secondary school students across Aragón (Universidad de Zaragoza) on core life science topics including biochemistry, cellular structures, metabolic pathways, molecular genetics, biotechnology, microbiology, and immunology. Note: The official PAU examination in Aragón consists of written open-ended and structured questions in Spanish; the 100 practice questions provided on this platform are an English-language multiple-choice adaptation designed to test core concept mastery and syllabus knowledge.
Exam sponsor: PAU Organising Commission of Aragón / UNIZAR. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Assessment
90-minute written examination featuring 5 questions (2 mandatory competency questions and 3 choice questions); local questions are an English-language MCQ study adaptation.
Time Limit
90 minutes (1.5 hours)
Passing Score
Marked on a 0–10 scale. Minimum 4.0 required in Access Phase to combine with Bachillerato GPA (60% Bachillerato + 40% PAU >= 5.0 to pass).
Exam / Certification Fees
EUR 75.00 ordinary registration fee (Access Phase plus two voluntary subjects); EUR 30.93 per additional voluntary subject (UNIZAR 2026)
Exam sponsor websiteReported exam pass rate: About 95% of Bachillerato candidates passed the Aragón PAU Access Phase in the June 2025 ordinary sitting (regional reported results).. This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Our practice resources: topics covered
We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.
Biochemistry and Biomolecules
Water structure and physical properties, bioelements, trace elements, mineral salts, osmotic regulation, pH buffers, monosaccharides, disaccharides, polysaccharides, saponifiable and non-saponifiable lipids, amino acids, peptide bonds, protein levels of structure, enzyme catalysis, and nucleic acid polymers (DNA and RNA).
Cell Biology and Cell Division
Prokaryotic versus eukaryotic cellular architecture, plasma membrane structure (fluid mosaic model), active/passive transport, endocytosis/exocytosis, endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, mitochondria, chloroplasts, cytoskeleton, nucleus, mitosis stages, and meiosis with genetic recombination.
Metabolism and Energy Transformation
Anabolic and catabolic pathways, ATP structure and role, NAD+/NADP+/FAD electron carriers, enzyme kinetics, glycolysis, pyruvate dehydrogenase complex, Krebs cycle, mitochondrial electron transport chain and chemiosmosis, fermentations, photophosphorylation, and Calvin cycle carbon fixation.
Molecular Genetics and Evolution
Semi-conservative DNA replication mechanism and enzymes, transcription in prokaryotes and eukaryotes, RNA processing, genetic code degenerateness and universality, translation steps, gene mutations (point mutations, frameshifts), chromosomal mutations, and molecular mechanisms of evolution.
Microbiology, Biotechnology, and Immunology
Bacterial cell structure and binary fission, viral structure and lytic/lysogenic cycles, prions, recombinant DNA technology, PCR, gel electrophoresis, innate immunity barriers, cellular and humoral adaptive immune responses, immunoglobulins (IgG, IgM, IgA, IgE, IgD), MHC molecules, vaccines, hypersensitivity reactions, and autoimmune disorders.
Preparing for the Aragón PAU Biology Exam
What You Need to Know
- Passing score: Marked on a 0–10 scale. Minimum 4.0 required in Access Phase to combine with Bachillerato GPA (60% Bachillerato + 40% PAU >= 5.0 to pass).
- Assessment: 90-minute written examination featuring 5 questions (2 mandatory competency questions and 3 choice questions); local questions are an English-language MCQ study adaptation.
- Time limit: 90 minutes (1.5 hours)
- Exam / certification fees: EUR 75.00 ordinary registration fee (Access Phase plus two voluntary subjects); EUR 30.93 per additional voluntary subject (UNIZAR 2026) Official sources
Using Our Practice Resources
- Work through all 100 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
Aragón PAU Biology: Suggested Study Strategy
Frequently Asked Questions
What is the structure of the official UNIZAR Aragón PAU Biology exam?
The official Aragón PAU Biology exam is a 90-minute paper with 5 questions worth 2 points each (2 compulsory competency questions and 3 questions with choice between option A or B). Questions require written responses, diagrams, or problem solving in Spanish. The 100 questions here are an English MCQ study adaptation.
What passing score is required for Aragón PAU Biology?
The exam is graded on a 0–10 scale. A minimum of 4.0 points in the Access Phase is required to combine with the 2nd Bachillerato GPA (60% Bachillerato GPA + 40% PAU Access Phase >= 5.0 to pass).
What is the fee for taking the PAU exam in Aragón?
The base registration fee for the PAU Access Phase at Universidad de Zaragoza (UNIZAR) is EUR 75.00, with reductions available for large families or qualified fee-exempt categories.
Which syllabus topics are covered in Aragón PAU Biology?
The exam covers the 6 basic blocks of the official 2nd Bachillerato curriculum: Biomolecules, Cell Biology, Metabolism, Molecular Genetics, Biotechnology, and Immunology.
Why are these practice questions presented as English MCQs?
These 100 questions serve as an English-language study adaptation to help students, bilingual learners, and international candidates test their understanding of fundamental biological concepts required by the UNIZAR curriculum.