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100+ Free DZI Biology and Health Education Practice Questions

Prepare for the DZI Biology and Health Education (Държавен зрелостен изпит по биология и здравно образование) exam with instant access — no signup required.

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2026 Statistics

Key Facts: DZI Biology and Health Education Exam

4 astronomical hours

Official written DZI Biology duration (240 minutes; typically two parts)

MON учебно-изпитна програма / candidate briefing for DZI

30 / 100 points

MON unified scale: Среден (Fair 3.00) begins at 30% of maximum points

МОН Скала за оценяване; Ordinance No. 11 of 1 September 2016

22 May 2026, 08:30

Second compulsory DZI date in the May 2026 session (biology if chosen)

MON / RUO timetable, Заповед РД09-2072/26.08.2025

Written and anonymous

Official paper is a Bulgarian written test mixing closed and open tasks, not MCQ-only

MON DZI subject pages and УИП

2 compulsory DZI

Bulgarian Language and Literature plus one chosen subject; optional extra papers allowed

Eurydice Bulgaria; Ordinance 11 / ЗПУО framework

ООП and ПП tracks

General (grades 8–10) versus four profiling modules in grades 11–12 (268 hours ПП)

Наредба № 7 for профилирана подготовка; MON УИП

Fair / Среден 3.00

Minimum passing qualitative grade on the 2.00–6.00 scale

Ordinance No. 11 of 1 September 2016; Eurydice grading table

Free 100-question English MCQ study bank for Bulgaria DZI Biology and Health Education. Official exam: written anonymous Bulgarian paper, 4 hours, 0–100 points, pass Среден 3.00 at 30%. OOP and PP tracks; 2026 second compulsory sitting 22 May 08:30. Not an official translation or format simulation.

Sample DZI Biology and Health Education Practice Questions

Try these sample questions to test your DZI Biology and Health Education exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1According to cell theory (клетъчна теория), which statement is correct?
A.Only animals are made of cells; plants are made of fibres
B.All living organisms are composed of one or more cells, and new cells arise from existing cells
C.Viruses are complete cells that divide by митоза
D.The smallest living units are atoms, not cells
Explanation: Cell theory states that the cell is the elementary structural and functional unit of life, that organisms are unicellular or multicellular, and that cells arise from pre-existing cells. This is the starting postulate of Модул 1 (Клетката – елементарна биологична система).
2Which feature distinguishes a typical prokaryotic cell (e.g. a bacterium) from a eukaryotic animal cell?
A.Presence of ribosomes that synthesise белтъци
B.A plasma membrane of phospholipid bilayer
C.Absence of a membrane-bound nucleus (ядро) and membrane-bound organelles
D.Use of DNA as genetic material
Explanation: Prokaryotes have no nucleus or membrane-bound organelles; their DNA lies in a nucleoid. Both cell types have membranes, ribosomes, and DNA. DZI items often ask you to compare бактерии with animal or plant cells.
3What is the primary function of the nucleus (ядро) in a eukaryotic cell?
A.Synthesising ATP by oxidative phosphorylation
B.Storing genetic information in DNA and controlling gene expression
C.Digesting worn-out organelles with hydrolytic enzymes
D.Fixing carbon dioxide into sugars
Explanation: The nucleus houses chromosomal DNA and coordinates transcription. Nuclear pores exchange RNA and proteins with the cytosol. ATP synthesis is mitochondrial; digestion is lysosomal; carbon fixation is chloroplastic.
4Mitochondria (митохондрии) are the main site of which process in animal cells?
A.Glycolysis in the cytosol
B.Aerobic respiration producing most of the cell's ATP
C.Transcription of nuclear genes
D.Synthesis of secretory белтъци on bound ribosomes
Explanation: Mitochondria carry out the Krebs cycle and oxidative phosphorylation, yielding most ATP under aerobic conditions. Glycolysis is cytosolic; nuclear transcription is in the nucleus; secretory proteins are made on rough ER.
5Chloroplasts (хлоропласти) enable plant cells to perform photosynthesis because they contain
A.Haemoglobin that binds oxygen
B.Chlorophyll and the thylakoid membranes that capture light energy
C.Centrioles that organise the spindle
D.Cilia that move water over the cell surface
Explanation: Chlorophyll in thylakoid membranes absorbs light and drives electron transport that produces ATP and NADPH for the Calvin cycle. Animal cells lack chloroplasts. Haemoglobin, centrioles, and cilia are unrelated to photosynthetic carbon fixation.
6Ribosomes (рибозоми) are the cellular structures that
A.Package proteins into secretory vesicles in the Golgi
B.Translate mRNA into a polypeptide chain (белтък)
C.Replicate the nuclear DNA during S phase
D.Hydrolyse glycogen to glucose in the liver
Explanation: Ribosomes catalyse translation: amino acids are joined according to the mRNA codon sequence. They may be free in the cytosol or bound to rough ER. Golgi packaging, DNA replication, and glycogenolysis are different processes.
7The plasma membrane (клетъчна мембрана) is described as a phospholipid bilayer with embedded proteins. This structure mainly allows the cell to
A.Store starch as a long-term energy reserve
B.Control selective exchange of substances with the environment
C.Synthesise ribosomal RNA in the nucleolus
D.Form the spindle during митоза
Explanation: The fluid mosaic membrane is selectively permeable: lipids and proteins regulate diffusion, facilitated transport, and active transport. Starch storage, rRNA synthesis, and spindle formation are not membrane-barrier functions.
8ATP (adenosine triphosphate) is biologically important because it
A.Is the only molecule that can store genetic information
B.Transfers usable chemical energy by hydrolysis of a phosphate bond
C.Is the structural monomer of cellulose cell walls
D.Carries oxygen in mammalian blood
Explanation: ATP is the cell's short-term energy currency: hydrolysis to ADP + Pi releases energy that powers active transport, biosynthesis, and movement. Genetic information is stored in DNA; cellulose monomers are glucose; oxygen is carried by haemoglobin.
9A plant cell is placed in a hypertonic NaCl solution. Water will
A.Enter the cell by osmosis and cause it to burst immediately
B.Leave the cell by osmosis, and the protoplast will shrink away from the wall (plasmolysis)
C.Be pumped in by ATP-driven pumps until turgor is maximal
D.Not move, because plant cell walls are completely impermeable to water
Explanation: In a hypertonic medium, external solute concentration is higher, so water leaves by osmosis. The living protoplast contracts (plasmolysis) while the rigid wall remains. Animal cells would crenate; plant walls prevent bursting in hypotonic media instead.
10Sodium–potassium pumps in animal cells move Na+ out and K+ in against their gradients. This is an example of
A.Simple diffusion through the lipid bilayer
B.Facilitated diffusion through a channel that requires no ATP
C.Primary active transport coupled to ATP hydrolysis
D.Osmosis of water toward the hypertonic cytosol
Explanation: The Na+/K+-ATPase uses ATP directly to move ions against electrochemical gradients (typically 3 Na+ out / 2 K+ in). Diffusion and osmosis are passive and cannot build those gradients.

About the DZI Biology and Health Education Exam

Държавен зрелостен изпит по биология и здравно образование is Bulgaria's state matriculation examination in biology and health education, administered by the Ministry of Education and Science (МОН). It is a written, anonymous Bulgarian-language test of 4 astronomical hours, scored 0–100 points and converted to 2.00–6.00 under Ordinance No. 11 (passing Fair/Среден 3.00 at 30/100). Students sit two compulsory DZI — Bulgarian Language and Literature plus one chosen subject — and may add optional papers. Biology is offered as ООП or ПП (four modules: cell; multicellular organisation; biosphere; evolution). The official paper mixes closed and open tasks. This free English MCQ bank is a study adaptation of curriculum content — not an official translation, format simulation, or substitute for the Bulgarian written DZI.

Assessment

Official ДЗИ по биология и здравно образование is a written, anonymous Bulgarian-language test lasting 4 astronomical hours, typically in two parts (about 90 then 150 minutes). Papers exist for общообразователна подготовка (ООП) and профилирана подготовка (ПП: four compulsory modules — Клетката; Многоклетъчна организация; Биосфера; Еволюция). Tasks mix closed items with short and extended constructed responses, scored to a 100-point maximum. This 100-question bank is an English MCQ study adaptation only — it does not simulate the official mixed-format paper or substitute for Bulgarian written practice.

Time Limit

4 astronomical hours (240 minutes). 2026 May session: second compulsory DZI on 22 May 2026 at 08:30; compulsory Bulgarian Language and Literature is 20 May 2026 at 08:30. Additional DZI-by-choice papers run in the late-May window published in the MON заповед for 2025/2026.

Passing Score

0–100 points converted to 2.00–6.00 under Ordinance No. 11 of 1 September 2016. Passing is Fair/Среден 3.00. MON unified DZI scale: Среден begins at 30% of maximum (30/100); Слаб 2 is up to 29.75 points.

Exam Fee

No separately published national candidate tariff for current Grade 12 public-school students sitting DZI through their school. External or competence-validation sittings, where they exist, follow MON/school procedures; no euro amount is published here. (Ministry of Education and Science of Bulgaria (Министерство на образованието и науката, МОН))

DZI Biology and Health Education Exam Content Outline

Study emphasis ~22%

Cell biology (Клетката)

Organelles, membranes, enzymes, митоза/мейоза, metabolism, DNA and protein synthesis (ПП Module 1, 72 hours).

Study emphasis ~15%

Genetics

Mendel, probability, blood groups, sex-linkage, mutations — from ПП Module 2 and ООП heredity. Official % weights unpublished.

Study emphasis ~25%

Human biology and здравно образование

Organ systems, immunity, homeostasis, nutrition, and disease-prevention themes from the health-education strand.

Study emphasis ~23%

Evolution and ecology

Biosphere structure, Black Sea/Balkan ecology, conservation, evolutionary factors and speciation (ПП Modules 3–4).

Study emphasis ~15%

Microbiology and biotechnology

Viruses, bacteria, fungi, antibiotics, fermentation, and applied genetic technologies from ООП/ПП cell topics.

How to Pass the DZI Biology and Health Education Exam

What You Need to Know

  • Passing score: 0–100 points converted to 2.00–6.00 under Ordinance No. 11 of 1 September 2016. Passing is Fair/Среден 3.00. MON unified DZI scale: Среден begins at 30% of maximum (30/100); Слаб 2 is up to 29.75 points.
  • Assessment: Official ДЗИ по биология и здравно образование is a written, anonymous Bulgarian-language test lasting 4 astronomical hours, typically in two parts (about 90 then 150 minutes). Papers exist for общообразователна подготовка (ООП) and профилирана подготовка (ПП: four compulsory modules — Клетката; Многоклетъчна организация; Биосфера; Еволюция). Tasks mix closed items with short and extended constructed responses, scored to a 100-point maximum. This 100-question bank is an English MCQ study adaptation only — it does not simulate the official mixed-format paper or substitute for Bulgarian written practice.
  • Time limit: 4 astronomical hours (240 minutes). 2026 May session: second compulsory DZI on 22 May 2026 at 08:30; compulsory Bulgarian Language and Literature is 20 May 2026 at 08:30. Additional DZI-by-choice papers run in the late-May window published in the MON заповед for 2025/2026.
  • Exam fee: No separately published national candidate tariff for current Grade 12 public-school students sitting DZI through their school. External or competence-validation sittings, where they exist, follow MON/school procedures; no euro amount is published here.

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

DZI Biology and Health Education Study Tips from Top Performers

1Confirm whether you sit ООП or ПП before revising: ПП Module 1 (клетка, 72 h) and Module 2 (многоклетъчна организация, 116 h) carry the largest official hour loads.
2Drill митоза versus мейоза until you can name phase products, chromosome number, and why meiosis enables genetic variation.
3Practise quantitative Mendelian problems (monohybrid, dihybrid, sex-linked, blood groups) with explicit probability, not pattern-matching.
4Tie organ-system facts to здравно образование: prevention of cardiovascular disease, vaccination, nutrition, tobacco, alcohol, and STI risk.
5Learn Bulgaria-specific ecology: Black Sea hypoxia and invasive Rapana venosa, Balkan endemics such as Haberlea rhodopensis, and protected areas (Rila, Pirin, Srebarna).
6After MCQ concept work, practise official Bulgarian closed-plus-open tasks from MON past papers — this bank trains recognition, not constructed-response writing under 4 hours.
7Use MON's 30/100 Среден threshold as a pacing reminder: open tasks often decide whether you clear the pass line, so do not spend the whole 240 minutes on closed items only.

Frequently Asked Questions

Is the official DZI Biology exam a multiple-choice test in English?

No. The official ДЗИ по биология и здравно образование is a written, anonymous paper in Bulgarian that mixes closed items with short and extended constructed-response tasks. This bank is an English-language MCQ study adaptation — not an official translation, format simulation, or substitute for the real exam.

How long is the DZI Biology exam and when is the 2026 sitting?

Duration is 4 astronomical hours (240 minutes), typically split into two parts. In the May 2026 session the second compulsory DZI — the slot used when biology is the chosen subject — is on 22 May 2026 at 08:30.

What score is needed to pass?

Papers are scored 0–100 points and converted to 2.00–6.00 under Ordinance No. 11 of 1 September 2016. Passing is Fair/Среден 3.00. MON's unified DZI scale sets Среден at 30% of maximum points (30/100).

What is the difference between ООП and ПП biology papers?

ООП (общообразователна подготовка) assesses first-gymnasium biology (about grades 8–10). ПП (профилирана подготовка) assesses the four compulsory profiling modules in grades 11–12: Клетката; Многоклетъчна организация на биологичните системи; Биосфера – структура и процеси; Еволюция на биологичните системи. Choose the paper that matches how you studied the subject.

Is biology one of the two compulsory DZI?

Every candidate must sit Bulgarian Language and Literature plus one chosen subject. Biology can be that second compulsory paper if selected, or an optional additional DZI. Eurydice notes that both compulsory exams must be passed for a diploma giving access to higher education.

Is there a published exam fee for Grade 12 school candidates?

No separately published national candidate tariff applies to current Grade 12 public-school students sitting DZI through their school. Do not rely on unofficial euro figures. External or competence-validation sittings follow MON/school procedures.

What official documents should I use besides this practice bank?

Use the MON DZI pages, the subject изпитни материали for биология и здравно образование, the УИП sample tasks, Ordinance No. 11, and the published ДЗИ scoring scale. Past session papers are released on the MON site after each sitting.