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Exam Review

Key Facts: Érettségi Biológia Exam

A current elective subject governed by the detailed requirements effective from the 2024 spring examination period.

Offered at two levels: Középszint (intermediate, 150 min written + 15 min oral) and Emelt szint (advanced, 240 min written + 20 min oral).

Biology can be relevant to medicine and other life-science programmes, but current admission requirements are programme-specific.

Grading differs by level: grade 5 begins at 80% for középszint and 60% for emelt szint; both require 25% overall and at least 12% in each required part.

Total available points: 150 points (written exam: 100 points, oral exam: 50 points).

Written exam allows non-programmable calculators; no formula tables or textbook references are permitted.

Centrally developed and supervised by the Oktatási Hivatal (Educational Authority) with sessions held in May–June and autumn (October–November).

Emelt oral exam features a compulsory practical laboratory experiment or experimental analysis alongside theoretical defense.

The Hungarian Érettségi in Biology (Biológia) is a current school-leaving subject offered at középszint and emelt szint, combining written biological reasoning with an oral component that may involve eligible project or practical work.

Sample Érettségi Biológia Practice Questions

Try these sample questions to review concepts for the Érettségi Biológia exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which level of protein structure is formed primarily by hydrogen bonds between the backbone carbonyl oxygen and amide hydrogen atoms of the polypeptide chain, producing alpha-helices and beta-pleated sheets?
A.Primary structure
B.Secondary structure
C.Tertiary structure
D.Quaternary structure
Explanation: Secondary structure refers to localized folding patterns—predominantly alpha-helices and beta-pleated sheets—stabilized by hydrogen bonds between carbonyl oxygen (C=O) and amino hydrogen (N-H) groups of the polypeptide backbone, independent of R-group interactions.
2According to the fluid mosaic model of biological membranes, what structural characteristic allows phospholipids to naturally assemble into a stable bilayer in an aqueous environment?
A.They are entirely hydrophobic molecules that repel water completely from both faces.
B.They are completely hydrophilic and establish hydrogen bonds with water molecules on both sides.
C.They are amphipathic, possessing hydrophilic polar heads and hydrophobic nonpolar fatty acid tails.
D.They are covalently linked together through alternating glycerol-phosphate ester bonds across the bilayer.
Explanation: Phospholipids are amphipathic: their polar phosphate heads are hydrophilic and orient outward to interact with aqueous extracellular and cytosolic fluids, while their nonpolar hydrocarbon fatty acid tails orient inward away from water, spontaneously creating a thermodynamic bilayer.
3A fresh epidermal peel from a red onion (Allium cepa) is placed into a 10% concentrated sucrose solution. Which microscopic phenomenon will be observed, and what is its physiological cause?
A.Plasmolysis occurs because water leaves the central vacuole by osmosis into the hypertonic surrounding solution, causing the protoplast to shrink away from the rigid cell wall.
B.Deplasmolysis occurs because sucrose molecules rapidly enter the vacuole via facilitated diffusion, causing cell expansion.
C.Cytolysis occurs because water enters the cell down its water potential gradient until the plasma membrane bursts.
D.Turgor pressure increases because the external solute concentration draws water into the central vacuole.
Explanation: A 10% sucrose solution is hypertonic relative to the onion epidermal cell sap. Water exits the cell by osmosis from high to low water potential, shrinking the central vacuole and pulling the plasma membrane away from the cell wall—a process termed plasmolysis.
4The plasma membrane Na+/K+-ATPase is a primary active transport pump essential for animal cellular homeostasis. What is its exact transport stoichiometry and energy requirement per cycle?
A.It transports 2 Na+ ions out of the cell and 3 K+ ions into the cell without consuming ATP.
B.It transports 3 Na+ ions into the cell and 2 K+ ions out of the cell using the energy of 1 ATP.
C.It transports 3 K+ ions out of the cell and 2 Na+ ions into the cell coupled to GTP hydrolysis.
D.It transports 3 Na+ ions out of the cell and 2 K+ ions into the cell using the energy of 1 ATP.
Explanation: The Na+/K+-ATPase hydrolyzes 1 ATP molecule to export 3 Na+ ions out of the cell and import 2 K+ ions into the cell against their respective electrochemical gradients, generating an electrogenic contribution to the resting membrane potential.
5What is the correct sequential pathway of a secreted peptide hormone (such as insulin) from its initial synthesis to extracellular release?
A.Free cytosolic ribosomes -> Smooth endoplasmic reticulum -> Lysosome -> Exocytosis
B.Rough endoplasmic reticulum -> Transport vesicle -> Golgi apparatus -> Secretory vesicle -> Exocytosis
C.Golgi apparatus -> Rough endoplasmic reticulum -> Transport vesicle -> Plasma membrane
D.Nucleus -> Rough endoplasmic reticulum -> Smooth endoplasmic reticulum -> Pinocytosis
Explanation: Secretory proteins are translated by ribosomes bound to the rough endoplasmic reticulum (RER), transported via COPII-coated vesicles to the cis-Golgi for post-translational modification and sorting, packaged into secretory vesicles at the trans-Golgi, and released extracellularly by exocytosis.
6Which eukaryotic organelle contains the enzyme catalase, and what specific physiological reaction does it catalyze to protect the cell?
A.Peroxisome; it breaks down toxic hydrogen peroxide (2 H2O2 -> 2 H2O + O2).
B.Lysosome; it hydrolyzes peptide bonds under acidic pH conditions.
C.Mitochondrion; it reduces molecular oxygen to water at Complex IV.
D.Golgi apparatus; it attaches oligosaccharide side chains to glycoproteins.
Explanation: Peroxisomes carry out oxidative reactions that produce hydrogen peroxide (H2O2). Catalase is a hallmark peroxisomal antioxidant enzyme that rapidly decomposes toxic H2O2 into water and molecular oxygen, preventing cellular oxidative damage.
7In enzyme kinetics, how does a reversible competitive inhibitor affect the Michaelis constant (Km) and the maximum reaction velocity (Vmax) of an enzyme-catalyzed reaction?
A.It decreases Km and leaves Vmax unchanged.
B.It decreases both Km and Vmax.
C.It increases Km while leaving Vmax unchanged.
D.It leaves Km unchanged while decreasing Vmax.
Explanation: A competitive inhibitor structurally resembles the substrate and competes for binding at the active site. Increasing substrate concentration outcompetes the inhibitor, so Vmax can still be reached (unchanged Vmax). However, a higher substrate concentration is required to achieve half-maximal velocity, which increases Km (apparent affinity decreases).
8During eukaryotic glycolysis, what is the net yield of ATP and reduced electron carriers generated per molecule of glucose oxidized to two molecules of pyruvate?
A.4 ATP (net) and 2 FADH2
B.2 ATP (net) and 4 NADH
C.36 ATP (net) and 10 NADH
D.2 ATP (net) and 2 NADH
Explanation: Glycolysis consumes 2 ATP in the preparatory/energy-investment phase and produces 4 ATP in the pay-off phase via substrate-level phosphorylation, yielding a net of 2 ATP. In addition, 2 molecules of NAD+ are reduced to 2 NADH.
9Where does the citric acid cycle (Krebs cycle) take place in eukaryotic cells, and which four-carbon intermediate condenses with acetyl-CoA in the first reaction step?
A.Mitochondrial intermembrane space; Malate
B.Mitochondrial matrix; Oxaloacetate
C.Cytoplasm; Citrate
D.Inner mitochondrial membrane; Alpha-ketoglutarate
Explanation: The citric acid cycle operates in the mitochondrial matrix (with the single exception of succinate dehydrogenase, which is bound to the inner mitochondrial membrane). In the initial step, citrate synthase condenses the two-carbon acetyl group of acetyl-CoA with four-carbon oxaloacetate to form six-carbon citrate.
10According to Mitchell's chemiosmotic hypothesis, how is the electrochemical proton gradient across the inner mitochondrial membrane utilized to synthesize ATP?
A.Protons are pumped by ATP synthase from the matrix into the intermembrane space using ATP hydrolysis.
B.Protons directly transfer high-energy electrons to ADP, converting it into ATP.
C.Protons flow down their electrochemical gradient from the intermembrane space into the matrix through the F0 channel of ATP synthase, driving rotational catalysis in F1 to form ATP from ADP and Pi.
D.Protons activate cytosolic protein kinase cascades that phosphorylate ADP independently of membrane transport.
Explanation: Respiratory complexes I, III, and IV pump H+ from the matrix into the intermembrane space, creating a proton-motive force. As protons diffuse down this gradient back into the matrix through the F0 subunit of ATP synthase, the rotor turns, inducing conformational changes in the catalytic F1 beta-subunits that synthesize ATP from ADP and inorganic phosphate.

About the Érettségi Biológia Exam

Biológia is a current elective Érettségi subject at középszint and emelt szint. It assesses cellular and molecular biology, organismal and human biology, genetics and evolution, ecology, quantitative data interpretation, and experimental reasoning. Középszint is a 150-minute written paper followed by a 15-minute oral; emelt szint is a 240-minute written paper followed by a 20-minute oral. Oral work can include an eligible project or practical investigation. These 100 English MCQs are independent study questions, not an official translation or format simulation and not a substitute for experimental, project, constructed-response, or oral practice.

Exam sponsor: Oktatási Hivatal (Educational Authority, Hungary). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Question count varies by exam level

Time Limit

150 minutes written + 15-minute oral (középszint); 240 minutes written + 20-minute oral (emelt szint)

Passing Score

At least 25% overall and at least 12% in each written and oral part. Középszint grades: 25–39% = 2, 40–59% = 3, 60–79% = 4, 80–100% = 5. Emelt szint grades: 25–32% = 2, 33–46% = 3, 47–59% = 4, 60–100% = 5.

Exam / Certification Fees

Free for qualifying students taking examinations toward their first school-leaving certificate, including the first remedial or replacement examination before receiving it. For fee-paying 2026 entries, the per-subject fee is HUF 48,000 at középszint and HUF 81,000 at emelt szint.

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.

22%

Human Anatomy & Physiology

Circulatory dynamics, respiratory mechanics, digestive biochemistry, renal filtration, neurobiology, autonomic reflexes, and endocrine feedback loops.

16%

Molecular & Cellular Biology

Biomolecules, cellular architecture, bioenergetics (cellular respiration, photosynthesis), enzyme kinetics, and cell division cycles.

16%

Genetics & Heredity

Mendelian genetics, sex linkage, pedigree analysis, DNA replication, protein synthesis, gene mutations, and molecular regulation.

12%

Health & Disease

Innate and adaptive immunology, immunization mechanisms, allergy and autoimmunity, cardiovascular disease etiology, and pathogens.

12%

Plant & Fungal Biology

Plant tissue differentiation, water transpiration-cohesion pull, phloem bulk flow, phytohormones, angiosperm lifecycle, and fungal nutrition.

10%

Animal Biology & Comparative Physiology

Evolutionary comparative anatomy of circulatory, respiratory, excretory, and nervous systems across phyla, plus animal behavior.

7%

Ecology & Environmental Protection

Populations, community dynamics, trophic pyramids, biogeochemical cycles, anthropogenic environmental stress, and conservation.

5%

Evolution & Biosphere

Natural selection, Hardy-Weinberg equilibrium, speciation, phylogenetic evidence, endosymbiosis, and global biome distribution.

Preparing for the Érettségi Biológia Exam

What You Need to Know

  • Passing score: At least 25% overall and at least 12% in each written and oral part. Középszint grades: 25–39% = 2, 40–59% = 3, 60–79% = 4, 80–100% = 5. Emelt szint grades: 25–32% = 2, 33–46% = 3, 47–59% = 4, 60–100% = 5.
  • Assessment: Question count varies by exam level
  • Time limit: 150 minutes written + 15-minute oral (középszint); 240 minutes written + 20-minute oral (emelt szint)
  • Exam / certification fees: Free for qualifying students taking examinations toward their first school-leaving certificate, including the first remedial or replacement examination before receiving it. For fee-paying 2026 entries, the per-subject fee is HUF 48,000 at középszint and HUF 81,000 at emelt szint. 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

Érettségi Biológia: Suggested Study Strategy

1Master genetic cross calculations and pedigree analysis: practise autosomal dominant, autosomal recessive, X-linked, and codominant blood group inheritance pedigrees until you can determine genotype probabilities rapidly.
2Thoroughly diagram and review human physiological regulation: pay special attention to feedback loops such as the hypothalamic-pituitary-endocrine axes, blood calcium homeostasis, blood glucose regulation, and the renin-angiotensin-aldosterone system.
3Memorize the exact biochemical stages of cellular respiration and photosynthesis, including reactants, products, net ATP yields, cellular locations (mitochondrial matrix vs. inner membrane; chloroplast stroma vs. thylakoid), and electron carriers (NADH, FADH2, NADPH).
4Practise interpreting experimental data and graphs from past Oktatási Hivatal exam papers, focusing on independent vs. dependent variables, control groups, and enzyme reaction kinetics under varying pH and temperature conditions.
5Review comparative vertebrate anatomy systematically, creating comparison matrices for circulatory systems (single vs. double, 2/3/4 heart chambers), respiratory adaptations (countercurrent gills, amphibian skin/lungs, avian air sacs, alveolar lungs), and nitrogenous waste excretion (ammonia, urea, uric acid).
6For emelt szint candidates, review standard laboratory protocols and qualitative assays: Biuret test for proteins, Fehling or Benedict test for reducing sugars, iodine test for starch, and catalase breakdown of hydrogen peroxide.
7Time your practice sessions rigorously: aim to complete the written tasks with 15–20 minutes remaining for careful review of calculations, terminology, and reasoning.

Frequently Asked Questions

What is the difference between középszint and emelt szint Biology in the Hungarian Érettségi?

Középszint consists of a 150-minute written examination (100 points) and a 15-minute oral (50 points). Emelt szint consists of a 240-minute written examination (100 points) and a 20-minute oral (50 points). The oral requirements include practical or project-related work under the conditions stated in the official specification.

Is Biology Érettségi required for admission to medical school in Hungary?

Biology is commonly relevant to medicine and other life-science programmes, but admission requirements are set by each institution and programme and can change by admissions cycle. Candidates should check the current programme requirements rather than treating this examination page as admissions advice.

How is the final grade calculated for the Biology Érettségi?

The written exam contributes 100 points and the oral exam 50 points. Candidates need at least 25% overall and at least 12% in each required examination part. Középszint grades are 25–39% = 2, 40–59% = 3, 60–79% = 4, and 80–100% = 5; emelt szint grades are 25–32% = 2, 33–46% = 3, 47–59% = 4, and 60–100% = 5.

What aids and materials are permitted during the written examination?

Students are permitted to use non-programmable scientific calculators that cannot store text or communicate wirelessly, as well as basic stationery (blue or black pens, pencils, rulers). No biology textbooks, dictionaries, or formula sheets are permitted in the biology examination hall.

What is required during the Emelt Szint oral examination in Biology?

The advanced oral examination comprises two tasks drawn randomly from official, centrally published national topic pools (tételek): Task 'A' tests theoretical biological principles (e.g., molecular genetics, comparative physiology, human homeostasis), while Task 'B' requires the candidate to carry out or analyze a hands-on laboratory investigation (e.g., catalase enzyme activity, starch digestion by amylase, microscopic examination of plant stomata, or food nutrient assays).

Where can students find official past exam papers for Biology Érettségi?

All past examination papers, official answer keys (javítási-értékelési útmutatók), and oral exam topic descriptions from 2005 to the present are publicly available free of charge on the official Oktatási Hivatal portal (oktatas.hu).

How do these English-language practice questions correspond to the official exam?

The official examination is normally conducted in Hungarian, subject to the rules for recognized bilingual or minority programmes. This bank is independent English-language, four-option practice on Biology topics; it is not an official translation, blueprint replica, or substitute for the written, oral, project, or practical work used in the examination.