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Sample Matura Biology Practice Questions

Try these sample questions to review concepts for the Matura 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 preventing rapid temperature fluctuations in aquatic organisms and cellular cytoplasm?
A.High specific heat capacity
B.High surface tension
C.Maximum density at 4 °C
D.High capillary action
Explanation: Water possesses a high specific heat capacity because extensive energy is required to break hydrogen bonds before kinetic energy and temperature can rise. This allows cellular cytoplasm and aquatic ecosystems to resist abrupt temperature swings, acting as a crucial thermal buffer for biochemical processes.
2A student performs Fehling's test on four biological solutions. Which of the following carbohydrates will produce a brick-red copper(I) oxide precipitate after heating?
A.Maltose
B.Sucrose
C.Starch
D.Cellulose
Explanation: Maltose is a reducing disaccharide consisting of two glucose units linked by an alpha-1,4-glycosidic bond, leaving one free anomeric hemiacetal carbon capable of opening into an active aldehyde group. This free aldehyde group reduces Cu2+ ions in Fehling's reagent to Cu+ ions, producing a characteristic brick-red Cu2O precipitate upon heating.
3What structural characteristic allows phospholipids to spontaneously assemble into a stable lipid bilayer in an aqueous environment?
A.Their amphipathic nature with hydrophilic phosphate heads and hydrophobic fatty acid tails
B.The presence of covalent disulfide bridges between adjacent fatty acid chains
C.High solubility in nonpolar solvents coupled with exclusively polar functional groups
D.Electrostatic repulsion between negatively charged glycerol backbones
Explanation: Phospholipids are amphipathic molecules containing a polar, hydrophilic phosphate-containing head and two nonpolar, hydrophobic hydrocarbon fatty acid tails. In water, hydrophobic interactions drive the nonpolar tails inward away from water, while the hydrophilic heads interact with the aqueous cytosol and extracellular fluid, creating an energetically stable bilayer.
4Which level of protein organization is primarily stabilized by hydrogen bonds between the carbonyl oxygen and amide hydrogen atoms of the polypeptide backbone, without involving R-group interactions?
A.Secondary structure
B.Primary structure
C.Tertiary structure
D.Quaternary structure
Explanation: Secondary structure, such as alpha-helices and beta-pleated sheets, is formed by regular hydrogen bonding between peptide bond carbonyl oxygen (C=O) and amino hydrogen (N-H) groups of the polypeptide backbone. These hydrogen bonds occur at repeating intervals along the backbone independent of specific amino acid side-chain (R-group) interactions.
5How does a competitive enzyme inhibitor affect the kinetic parameters Michaelis constant (Km) and maximum reaction velocity (Vmax)?
A.Increases Km while Vmax remains unchanged
B.Decreases Km while Vmax remains unchanged
C.Decreases both Km and Vmax proportionally
D.Vmax decreases while Km remains unchanged
Explanation: A competitive inhibitor structurally resembles the substrate and binds reversibly to the active site of the enzyme, competing directly with the substrate. Because high substrate concentrations can displace the inhibitor and fully saturate the enzyme, the maximum velocity (Vmax) remains unaltered, but a higher substrate concentration is required to reach half-maximal velocity, resulting in an increased apparent Km.
6A human enzyme loses activity after strong heating because its active site changes shape. Which mechanism best explains this thermal denaturation?
A.Thermal agitation disrupts non-covalent interactions, altering the tertiary structure and active site conformation
B.Excessive heat hydrolyzes the covalent peptide bonds of the primary sequence
C.Thermal energy converts L-amino acids into inactive D-stereoisomers
D.High temperatures cause irreversible oxidation of all nitrogenous bases
Explanation: Strong heating can disrupt the non-covalent interactions that maintain a protein's folded structure. A change in active-site shape can prevent effective substrate binding or catalysis without breaking the peptide backbone. The temperature required and whether activity returns on cooling depend on the particular enzyme and conditions.
7How does cholesterol help preserve the fluidity of animal plasma membranes at low temperatures?
A.It prevents close packing of phospholipid hydrocarbon chains, preserving membrane fluidity
B.It binds peripheral proteins to anchor the membrane to the extracellular matrix
C.It acts as a primary active transport carrier for monovalent cations
D.It accelerates phospholipid crystallization to form a rigid protective barrier
Explanation: Cholesterol functions as a bidirectional fluidity buffer in animal membranes. At low temperatures, its bulky steroid ring structure intercalates between phospholipid fatty acid tails, disrupting regular crystalline packing and lowering the gel-to-liquid transition temperature, which keeps the membrane fluid and functional.
8In human intestinal epithelial cells, the sodium-glucose cotransporter 1 (SGLT1) transports glucose into the cell against its concentration gradient. Which mechanism powers this transport?
A.The electrochemical sodium gradient established by the basolateral Na+/K+ ATPase pump
B.Direct hydrolysis of ATP by the SGLT1 carrier protein itself
C.Facilitated diffusion through voltage-gated aquaporin channels
D.Proton-motive force generated by mitochondrial complex I
Explanation: SGLT1 is a secondary active symporter that couples the downhill movement of sodium ions along their steep electrochemical gradient to the uphill transport of glucose into the enterocyte. The crucial sodium gradient is continuously maintained by the primary active Na+/K+ ATPase located on the basolateral membrane, which expels Na+ at the expense of ATP.
9What happens to a red onion epidermal cell when it is placed in a 10% sucrose solution (hypertonic medium)?
A.Water exits the vacuole via osmosis, causing the protoplast to shrink and detach from the rigid cell wall (plasmolysis)
B.Sucrose rapidly diffuses into the vacuole, causing the cell to swell and burst (osmotic lysis)
C.The cell wall expands significantly as turgor pressure reaches maximum capacity
D.Water enters the cell until the hydrostatic pressure matches the atmospheric pressure
Explanation: In a hypertonic sucrose solution, the external water potential is lower (more negative) than inside the cell, causing water to leave the vacuole and cytoplasm by osmosis. As internal volume decreases, turgor pressure drops to zero and the flexible protoplast pulls away from the rigid cellulose cell wall in a process termed plasmolysis.
10Which organelle sequence correctly tracks the synthesis, post-translational modification, and packaging of a secretory glycoprotein such as an antibody?
A.Rough endoplasmic reticulum → transport vesicle → Golgi apparatus → secretory vesicle → plasma membrane
B.Free ribosome → smooth endoplasmic reticulum → lysosome → nucleus → exocytosis
C.Golgi apparatus → rough endoplasmic reticulum → peroxisome → plasma membrane
D.Mitochondrial matrix → smooth endoplasmic reticulum → transport vesicle → nucleolus
Explanation: Secretory proteins are translated by ribosomes bound to the rough endoplasmic reticulum (rER), entering the lumen for initial folding and core glycosylation. Transport vesicles then shuttle the protein to the cis face of the Golgi apparatus for further carbohydrate modification and sorting, before budding from the trans face into secretory vesicles that fuse with the plasma membrane for exocytosis.

About the Matura Biology Exam

Independent practice for Polish Matura Biology. This is an English-language MCQ study adaptation, not an official translation, an official-format simulation, or a simulation of the official language environment. It provides selected topic revision and does not substitute for writing full responses in the official assessment language.

Exam sponsor: Centralna Komisja Egzaminacyjna (CKE) and the regional Okręgowe Komisje Egzaminacyjne (OKE), Poland. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Closed and open written tasks using experiments, diagrams, and data.

Time Limit

180 minutes

Passing Score

No minimum score for an additional extended-level subject in 2026. Certificate rules separately require 30% in each compulsory written and oral exam and attendance at an additional subject unless exempt.

Exam / Certification Fees

Generally free. In 2026, PLN 50 per subject, part, and level applies to third and subsequent sittings and certain previously declared additional-exam no-shows. OKE fee exemptions may apply; check the individual payment obligation.

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

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.

20% of this study bank

Cell Biology & Biochemistry

Chemical composition of organisms, macromolecule structure and functions, enzyme kinetics, cellular organelles, membrane transport, and cellular respiration and photosynthesis.

25% of this study bank

Genetics, Molecular Biology & Biotechnology

Molecular genetics, transcription and translation, genetic code, Mendelian inheritance, chromosomal genetics, gene mutations, genetic engineering, PCR, and biotechnology applications.

25% of this study bank

Human Anatomy & Physiology

Structure and function of all human organ systems, endocrine and neural regulation, cardiovascular dynamics, renal osmoregulation, immune defense, and homeostasis.

15% of this study bank

Plant & Animal Diversity & Structure

Plant histological organization, vascular transport, angiosperm alternation of generations, comparative invertebrate and vertebrate anatomy, and evolutionary adaptations.

15% of this study bank

Ecology & Evolution

Abiotic and biotic factors, population dynamics, ecological niches, community interactions, biogeochemical nutrient cycles, natural selection, speciation, and evolutionary history.

Preparing for the Matura Biology Exam

What You Need to Know

  • Passing score: No minimum score for an additional extended-level subject in 2026. Certificate rules separately require 30% in each compulsory written and oral exam and attendance at an additional subject unless exempt.
  • Assessment: Closed and open written tasks using experiments, diagrams, and data.
  • Time limit: 180 minutes
  • Exam / certification fees: Generally free. In 2026, PLN 50 per subject, part, and level applies to third and subsequent sittings and certain previously declared additional-exam no-shows. OKE fee exemptions may apply; check the individual payment obligation. 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

Matura Biology: Suggested Study Strategy

1Write explanations of experimental results and practice biological diagrams in Polish.
2Use the CKE informator and released papers for the complete scope and scoring criteria. These MCQs cover selected topics and skills rather than every assessed requirement.

Frequently Asked Questions

What does this practice bank cover?

Independent practice for Polish Matura Biology. This is an English-language MCQ study adaptation, not an official translation, an official-format simulation, or a simulation of the official language environment. It provides selected topic revision and does not substitute for writing full responses in the official assessment language. The section percentages describe this study bank, not official topic weightings. Consult the CKE informator for the complete requirements.

Are there separate assignments or performance requirements for this subject paper?

The subject assessment described here is the examination itself; no separate coursework portfolio or advance assignment is specified. Closed and open written tasks using experiments, diagrams, and data. Whole-certificate requirements and accommodations are governed by the 2026 CKE instructions.

Who can sit the examination, and what does it cost?

Eligible secondary-school graduates must submit the examination declaration. The applicable formula and subject requirements depend on school type, graduation cohort, and prior examination history; consult the 2026 CKE instructions. Generally free. In 2026, PLN 50 per subject, part, and level applies to third and subsequent sittings and certain previously declared additional-exam no-shows. OKE fee exemptions may apply; check the individual payment obligation.