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Key Facts: ORT Biology Exam

40

Official Test Questions

CEATM (ЦООМО)

60 min

Exam Duration

CEATM (ЦООМО)

60

Threshold Score

Ministry of Education & Science

470 KGS

Registration Fee

CEATM (ЦООМО)

The Kyrgyzstan ORT Subject Test in Biology is administered by CEATM (ЦООМО) for high school graduates seeking entrance into medical, veterinary, biotechnology, and life science degree programs. The official paper exam features 40 multiple-choice questions completed in 60 minutes with an eligibility threshold of 60 points and a registration fee of 470 KGS. Delivered officially in Kyrgyz and Russian, this practice resource provides an English-language MCQ study adaptation covering the core curriculum domains.

Sample ORT Biology Practice Questions

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

1Which organelle is characterized by inner folds called cristae and houses the enzyme ATP synthase for aerobic cellular respiration?
A.Endoplasmic reticulum
B.Golgi apparatus
C.Lysosome
D.Mitochondrion
Explanation: Mitochondria contain an extensively folded inner membrane forming cristae, which increases the surface area for the electron transport chain and ATP synthase complexes. This organelle generates the vast majority of ATP in aerobic eukaryotic cells through oxidative phosphorylation. Other endomembrane organelles lack cristae and ATP synthase machinery.
2What is the primary function of ribosomes within both prokaryotic and eukaryotic cells?
A.Synthesizing lipids and steroid hormones
B.Translating messenger RNA into polypeptide chains
C.Breaking down metabolic wastes through oxidative reactions
D.Packaging secretory polysaccharides into transport vesicles
Explanation: Ribosomes are universal ribonucleoprotein complexes composed of rRNA and ribosomal proteins that perform translation. They read codons along mRNA templates and catalyze peptide bond formation between aminoacyl-tRNAs. This essential protein synthesis machinery is conserved across all domains of life.
3Which organelle maintains an acidic internal lumen (pH ~4.5–5.0) and contains acid hydrolases for digesting worn-out organelles and engulfed foreign particles?
A.Peroxisome
B.Vacuole
C.Centrosome
D.Lysosome
Explanation: Lysosomes are membrane-enclosed digestive organelles containing acid hydrolases, such as proteases, nucleases, and lipases, that operate optimally at low pH. A vacuolar H+-ATPase in the lysosomal membrane actively pumps protons into the lumen to maintain this acidic environment. This compartment facilitates autophagy of damaged organelles and degradation of phagocytosed pathogens.
4When a freshwater plant cell with an internal solute concentration of 0.3 M is placed into a hypertonic sucrose solution of 0.8 M, what cellular response occurs?
A.Water enters the cell rapidly, causing the rigid cell wall to rupture through osmotic lysis
B.Solutes diffuse outward until dynamic equilibrium causes increased cytoplasmic turgor pressure
C.Water exits the vacuole and cytoplasm, causing the plasma membrane to pull away from the cell wall in plasmolysis
D.Active proton pumps reverse direction to transport sucrose into the cell against its gradient
Explanation: In a hypertonic external environment (0.8 M vs 0.3 M intracellular), the chemical potential of water is lower outside the cell, driving net osmotic water efflux. As water leaves the large central vacuole and cytoplasm, cell volume shrinks while the rigid cellulose wall maintains its shape, causing the plasma membrane to detach from the wall in a process known as plasmolysis. Osmotic lysis occurs in animal cells in hypotonic solutions, not plant cells in hypertonic media.
5The primary active transport mechanism of the sodium-potassium pump (Na+/K+-ATPase) moves ions across the plasma membrane by directly consuming ATP to:
A.Pump 3 Na+ ions out of the cell and 2 K+ ions into the cell
B.Pump 2 Na+ ions out of the cell and 3 K+ ions into the cell
C.Transport 3 Na+ and 3 K+ ions outward in an electroneutral cycle
D.Facilitate the passive downhill diffusion of 2 Na+ inward and 2 K+ outward
Explanation: The Na+/K+-ATPase is an electrogenic primary active transporter that couples the hydrolysis of one ATP molecule to the export of 3 Na+ ions and import of 2 K+ ions against their respective electrochemical gradients. This unequal charge displacement generates an inside-negative membrane potential and maintains low intracellular Na+ and high intracellular K+ concentrations. This ion gradient is critical for secondary active transport, nerve impulse propagation, and osmotic balance.
6Which structural property explains why phospholipids spontaneously assemble into stable bilayers in aqueous biological environments?
A.They are purely hydrophobic molecules that crystallize upon contact with polar water dipoles
B.They possess hydrophilic phosphate head groups and hydrophobic fatty acid hydrocarbon tails
C.They form covalent disulfide linkages between adjacent glycerol backbones upon exposure to oxygen
D.They are water-soluble polymers linked by alternating alpha-1,4-glycosidic bonds
Explanation: Phospholipids are amphipathic molecules possessing a polar, charged phosphate head group that interacts favorably with water and two nonpolar hydrocarbon fatty acid tails that are hydrophobic. In aqueous solution, hydrophobic interactions drive the nonpolar tails to face inward away from water while the polar heads interact with the aqueous cytosol and extracellular fluid, forming a thermodynamically stable bilayer. No covalent cross-links are required for this spontaneous self-assembly.
7What type of chemical reaction joins two amino acids together to form a dipeptide and releases a water molecule?
A.Hydrolytic cleavage
B.Electrophilic substitution
C.Oxidative decarboxylation
D.Dehydration synthesis (condensation)
Explanation: Amino acids are linked by a peptide bond formed through a dehydration synthesis (condensation) reaction. In this process, the carboxyl group (-COOH) of one amino acid reacts with the amino group (-NH2) of an adjacent amino acid, releasing a water molecule (H2O) and creating a covalent amide bond (-CO-NH-). Hydrolysis is the reverse process that cleaves peptide bonds by consuming water.
8In enzyme kinetics, how does the addition of a competitive inhibitor alter the Michaelis-Menten parameters Vmax and Km?
A.Km increases while Vmax remains unchanged
B.Km decreases while Vmax decreases
C.Km remains unchanged while Vmax decreases
D.Both Km and Vmax increase proportionally
Explanation: A competitive inhibitor reversibly binds directly to the active site of an enzyme, competing with the substrate. Because increasing substrate concentration can outcompete and displace the inhibitor, the maximum reaction velocity (Vmax) is unaffected at saturating substrate levels. However, a higher substrate concentration is required to reach half of Vmax, which is reflected as an increased Michaelis constant (Km).
9What happens to the tertiary structure and catalytic activity of most human enzymes when they are exposed to temperatures exceeding 65°C?
A.Covalent peptide bonds are hydrolyzed, destroying the primary amino acid sequence
B.Thermal agitation disrupts weak hydrogen and ionic bonds, leading to denaturation and loss of function
C.The enzyme switches from a globular conformation into a rigid beta-pleated crystalline sheet
D.The active site permanently alters its specificity to catalyze reverse synthetic reactions
Explanation: High thermal energy causes excessive molecular vibration that disrupts non-covalent interactions (hydrogen bonds, ionic attractions, hydrophobic interactions) that stabilize the tertiary and quaternary structures of enzymes. This unfolding, termed denaturation, alters the three-dimensional geometry of the catalytic active site so it can no longer bind its substrate. The primary covalent peptide backbone remains intact unless strong acid or specific peptidases are present.
10Where in the eukaryotic cell does glycolysis occur, and what is its net energy yield per molecule of glucose oxidized?
A.Mitochondrial matrix; 4 ATP and 2 FADH2
B.Inner mitochondrial membrane; 32 ATP and 6 CO2
C.Cytosol; 2 ATP and 2 NADH
D.Peroxisome; 2 ATP and 2 NADPH
Explanation: Glycolysis is an ancient anaerobic pathway that takes place entirely within the aqueous cytosol of eukaryotic cells. It cleaves one 6-carbon glucose molecule into two 3-carbon pyruvate molecules, consuming 2 ATP during the investment phase and generating 4 ATP via substrate-level phosphorylation, yielding a net gain of 2 ATP and 2 NADH. The mitochondrial matrix houses pyruvate oxidation and the Krebs cycle.

About the ORT Biology Exam

The ORT Subject Test in Biology is an elective subject test administered under the National Scholarship Testing (Общереспубликанское тестирование - ОРТ / Жалпы республикалык тестирлөө - ЖРТ) system in Kyrgyzstan. Administered by the Center for Educational Assessment and Teaching Methods (ЦООМО / CEATM), it is required for admission into state-funded and contractual university degree programs in medicine, biology, pharmacy, veterinary science, biotechnology, psychology, and agriculture. The exam assesses student mastery across cytology, biochemistry, genetics, human anatomy and physiology, botany, zoology, and evolutionary ecology.

Exam sponsor: Center for Educational Assessment and Teaching Methods (ЦООМО / CEATM). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Paper-and-pencil standardized test consisting of 40 multiple-choice questions with 4 answer choices each (administered in Kyrgyz or Russian; adapted here to English for practice).

Time Limit

60 minutes

Passing Score

60 points (minimum qualifying threshold set by the Ministry of Education and Science)

Exam / Certification Fees

470 KGS

Exam sponsor website

Reported exam pass rate: Competitive scoring based on national percentile ranking and university faculty quotas. Admission to state-funded grant seats and prestigious faculties such as medical specialties at KSMA requires scores significantly higher than the 60-point threshold. 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.

25%

Cell Biology & Biochemistry

Organelle functions, cell membranes, metabolic pathways including cellular respiration and photosynthesis, cell division (mitosis and meiosis), and molecular genetics.

30%

Organism Physiology & Genetics

Laws of inheritance, monohybrid and dihybrid inheritance, chromosome theory, and human organ systems with focus on nervous, endocrine, and circulatory regulation.

25%

Diversity of Organisms: Botany & Zoology

Morphological, anatomical, and physiological characteristics of prokaryotes, protists, fungi, higher plants (angiosperms/gymnosperms), and major animal phyla.

20%

Ecology & Evolution

Ecosystem structures, energy flow, trophic levels, nutrient cycles, population dynamics, natural selection, adaptation, and macro- and microevolution.

Preparing for the ORT Biology Exam

What You Need to Know

  • Passing score: 60 points (minimum qualifying threshold set by the Ministry of Education and Science)
  • Assessment: Paper-and-pencil standardized test consisting of 40 multiple-choice questions with 4 answer choices each (administered in Kyrgyz or Russian; adapted here to English for practice).
  • Time limit: 60 minutes
  • Exam / certification fees: 470 KGS 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

ORT Biology: Suggested Study Strategy

1Review high school biology textbooks approved by the Ministry of Education and Science of the Kyrgyz Republic covering 6th to 11th grade topics.
2Practice solving monohybrid, dihybrid, and sex-linked inheritance genetics problems quickly under timed conditions.
3Thoroughly understand human anatomy and organ system physiology, particularly neuroendocrine regulation and cardiovascular mechanisms.
4Make flashcards for plant anatomy (tissues, flowers, seeds) and comparative zoology (digestive, circulatory, and excretory systems across phyla).

Frequently Asked Questions

What is the format and duration of the ORT Biology Subject Test?

The official ORT Subject Test in Biology consists of 40 multiple-choice questions to be answered within 60 minutes. Questions offer four answer choices with a single correct response.

What is the minimum passing threshold score for ORT Biology?

The Ministry of Education and Science of the Kyrgyz Republic sets the minimum baseline threshold at 60 points for subject tests. However, competitive faculties like medical universities require scores well above this cutoff.

Who must take the ORT Biology Subject Test?

The Biology test is mandatory for candidates applying to medical (general medicine, dentistry, pediatrics), pharmaceutical, veterinary, biological, biotechnological, agricultural, and psychological specializations in higher educational institutions in Kyrgyzstan.

What languages is the official test offered in?

The official examination is offered in Kyrgyz and Russian. This practice bank serves as an English-language study adaptation to help candidates master the fundamental biological concepts.