Free Practice Questions for Georgia Unified Biology

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Key Facts: Georgia Unified Biology Exam

Maximum Total Points

NAEC Georgia

10 GEL

Examination Fee

NAEC Official

150 min

Time Limit

NAEC Regulations

>17.5

Competence Threshold (25%+)

NAEC Passing Standard

Georgia's Unified National Examination in Biology (ერთიანი ეროვნული გამოცდა ბიოლოგიაში), administered by NAEC, tests cell biology, genetics, human anatomy, and ecology for university admissions with a 70-point maximum and a 150-minute time limit for 10 GEL. The official paper is sat in Georgian, with a Russian version available to eligible candidates; this bank is an English-language MCQ study adaptation.

Sample Georgia Unified Biology Practice Questions

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

1Which type of chemical reaction joins two monosaccharide molecules to form a disaccharide such as maltose, with the simultaneous release of a water molecule?

A.Condensation (dehydration synthesis)

B.Hydrolytic cleavage

C.Decarboxylation

D.Oxidative phosphorylation

Explanation: A condensation reaction (dehydration synthesis) combines two monosaccharide monomers by removing a hydroxyl group from one and a hydrogen atom from the other, forming a glycosidic bond and releasing water. In contrast, hydrolysis breaks this bond by adding water back into the structure. This fundamental reaction builds complex carbohydrates like starch and glycogen.

2Why do phospholipids naturally assemble into a bilayer when placed in an aqueous biological environment?

A.Their hydrophilic phosphate heads face the water while their hydrophobic fatty acid tails face inward.

B.Their hydrophobic glycerol heads face outward while their hydrophilic hydrocarbon tails form the core.

C.Covalent disulfide bonds link adjacent phospholipid molecules to stabilize the membrane surface.

D.Electrostatic repulsion between phosphate groups forces the molecules to stack end-to-end linearly.

Explanation: Phospholipids are amphipathic molecules possessing hydrophilic (polar) phosphate-containing heads and hydrophobic (nonpolar) fatty acid tails. In water, hydrophobic interactions cause the fatty acid tails to cluster away from water molecules, while the charged phosphate heads interact favorably with the polar aqueous interior and exterior.

3Hemoglobin consists of two alpha and two beta polypeptide chains associated with iron-containing heme prosthetic groups. Which level of protein structural organization does this arrangement represent?

A.Primary structure

B.Secondary structure

C.Tertiary structure

D.Quaternary structure

Explanation: Quaternary structure refers to the assembly of multiple distinct polypeptide subunits into a single functional oligomeric protein complex. Hemoglobin is a classic tetramer composed of four polypeptide subunits (two alpha and two beta chains) non-covalently bound together. Single polypeptides that fold completely achieve tertiary structure, but multi-subunit assembly is required for quaternary classification.

4According to the induced-fit model of enzyme action, how does an enzyme lower the activation energy of a biochemical reaction?

A.The substrate permanently alters its chemical identity prior to contacting the enzyme surface.

B.The enzyme active site changes shape slightly upon substrate binding to strain specific chemical bonds.

C.The enzyme increases the ambient kinetic temperature inside the active site pocket.

D.The enzyme undergoes irreversible covalent breakdown to supply free energy to the reaction products.

Explanation: The induced-fit model postulates that initial binding of the substrate induces a conformational change in the enzyme's catalytic active site. This shape adjustment positions catalytic residues precisely and places mechanical strain on specific substrate bonds, stabilizing the transition state and lowering activation energy. Enzymes remain structurally intact and chemically unchanged at the conclusion of the reaction.

5What primary molecular event causes an enzyme to lose its catalytic activity when exposed to temperatures significantly above its optimum?

A.Peptide bonds between amino acids are rapidly cleaved by thermal hydrolysis.

B.Non-covalent hydrogen and ionic bonds stabilizing the tertiary structure are disrupted.

C.Ribosomes re-absorb the enzyme to recycle its constituent mRNA codons.

D.Substrate molecules are converted into competitive inhibitors by atmospheric oxidation.

Explanation: Excess thermal kinetic energy breaks weak non-covalent bonds, including hydrogen bonds, hydrophobic interactions, and ionic bridges, that maintain the enzyme's specific three-dimensional tertiary conformation. Once the native geometry of the active site is lost, the substrate can no longer bind, causing denaturation. High physiological temperatures typically do not hydrolyze strong covalent peptide bonds directly.

6In a double-stranded DNA molecule, if thymine accounts for 32% of the total nitrogenous bases, what percentage of the bases is expected to be guanine?

A.18%

B.32%

C.36%

D.64%

Explanation: According to Chargaff's rules, double-stranded DNA exhibits 1:1 base pairing where adenine equals thymine (A = T) and guanine equals cytosine (G = C). If thymine is 32%, adenine is also 32%, making the A + T total 64%. The remaining 36% consists equally of guanine and cytosine, meaning guanine represents 36% / 2 = 18%.

7Which RNA molecule possesses an anticodon loop and carries a specific amino acid to the ribosome during protein synthesis?

A.Transfer RNA (tRNA)

B.Messenger RNA (mRNA)

C.Ribosomal RNA (rRNA)

D.Small nuclear RNA (snRNA)

Explanation: Transfer RNA (tRNA) acts as the physical adapter molecule between genetic code and polypeptide synthesis. Each tRNA molecule has a specific three-base anticodon at one end that base-pairs with a complementary mRNA codon, and an amino acid attachment site at its 3' CCA terminal end. This ensures the correct sequential incorporation of amino acids into the growing polypeptide chain.

8Which chemical bonds within an ATP molecule release a large amount of free energy upon hydrolysis to power cellular work?

A.Phosphoanhydride bonds linking adjacent phosphate groups

B.Phosphodiester bonds connecting ribose to the alpha phosphate

C.Glycosidic bonds connecting adenine to the ribose sugar

D.Hydrogen bonds established between complementary purine rings

Explanation: ATP contains two high-energy phosphoanhydride bonds linking its three phosphate groups (beta-to-alpha and gamma-to-beta). Hydrolysis of the terminal phosphoanhydride bond yields ADP, inorganic phosphate, and approximately 30.5 kJ/mol of standard free energy. This energy release occurs because hydrolysis relieves significant electrostatic repulsion between the adjacent negatively charged oxygen atoms.

9What is the physiological purpose of the extensive inward foldings (cristae) of the inner mitochondrial membrane?

A.To segregate glycolysis enzymes from the pyruvate dehydrogenase complex

B.To increase the total surface area available for electron transport chains and ATP synthase complexes

C.To store calcium carbonate crystals for osmotic pressure regulation

D.To allow ribosomes direct physical passage into the intermembrane space

Explanation: Cristae are deep invaginations of the inner mitochondrial membrane that dramatically expand its total membrane surface area. This expanded surface accommodates thousands of copies of electron transport chain complexes (I-IV) and ATP synthase molecules per mitochondrion. A higher density of these respiratory complexes directly maximizes the rate of cellular oxidative phosphorylation.

10Where do the light-independent reactions (Calvin cycle) of photosynthesis take place within a plant cell?

A.Across the thylakoid lumen

B.Inside the stroma of the chloroplast

C.Within the intermembrane space of the chloroplast

D.Along the outer envelope membrane of the chloroplast

Explanation: The Calvin cycle (dark or light-independent reactions) occurs in the stroma, the fluid-filled space surrounding the thylakoid stacks within chloroplasts. The stroma contains soluble enzymes, including ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO), along with dissolved CO2, ATP, and NADPH produced by the light reactions. In contrast, light-dependent photophosphorylation takes place directly in and across the thylakoid membranes.

About the Georgia Unified Biology Exam

The Unified National Examination in Biology (ერთიანი ეროვნული გამოცდა ბიოლოგიაში) is the mandatory or elective university entrance examination administered across Georgia by NAEC. It tests graduating secondary students and university applicants on core biological concepts including cytology, molecular genetics, organismal physiology, evolutionary theory, and environmental biology.

Exam sponsor: National Assessment and Examinations Center (NAEC). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Standardized national written examination administered by NAEC in Georgia covering molecular biology, cytology, genetics, physiology, and ecology. Local practice bank is an English-language MCQ study adaptation.

Time Limit

150 minutes (2.5 hours)

Passing Score

Candidates must exceed 25% of the 70 maximum points (greater than 17.5 points) to meet the minimum competence threshold. Competitive medical and biological faculty admission cut-offs are determined annually based on scaled scores.

Exam / Certification Fees

10 GEL

Exam sponsor website

Reported exam pass rate: Annual admission ranking depends on scaled composite scores; high-demand medical faculties require top decile results. State grants covering 50%, 70%, or 100% of university tuition fees are awarded to the highest-scoring applicants nationally. 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.

25%

Molecular and Cell Biology

Macromolecules, cellular architecture, bioenergetics (cellular respiration and photosynthesis), and mitotic/meiotic cell division.

25%

Genetics and Evolution

Mendelian inheritance, non-Mendelian traits, gene expression, genetic code, mutations, and population genetics/natural selection.

30%

Human Anatomy and Physiology

Human organ systems: nervous, endocrine, circulatory, respiratory, digestive, renal, immune, and musculoskeletal regulation.

20%

Reproduction, Development and Ecology

Asexual and sexual reproduction, gametogenesis, meiosis and fertilisation, abiotic and biotic ecological factors, ecosystem feeding groups, food chains and webs, ecological pyramids, and Georgian biosphere conservation.

Preparing for the Georgia Unified Biology Exam

What You Need to Know

Passing score: Candidates must exceed 25% of the 70 maximum points (greater than 17.5 points) to meet the minimum competence threshold. Competitive medical and biological faculty admission cut-offs are determined annually based on scaled scores.
Assessment: Standardized national written examination administered by NAEC in Georgia covering molecular biology, cytology, genetics, physiology, and ecology. Local practice bank is an English-language MCQ study adaptation.
Time limit: 150 minutes (2.5 hours)
Exam / certification fees: 10 GEL Official sources

Using Our Practice Resources

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Georgia Unified Biology: Suggested Study Strategy

1Master the distinction between transcription and translation, focusing on enzyme specificity, mRNA codon pairing, and ribosome active sites.

2Thoroughly practice dihybrid crosses, codominance (ABO blood groups), and sex-linked traits to quickly solve genetics problems.

3Understand the functional anatomy of the nephron and countercurrent multiplication in renal osmoregulation.

4Review the light-dependent and light-independent reactions of photosynthesis, including photolysis of water and carbon fixation via RuBisCO.

Frequently Asked Questions

What is the Unified National Examination in Biology in Georgia?

It is the standardized national entrance exam administered by NAEC (National Assessment and Examinations Center) required for admission to medicine, dentistry, pharmacy, veterinary, and biological sciences programs in Georgian universities.

What is the passing threshold for the NAEC Biology exam?

To overcome the minimum competence threshold, candidates must score more than 25% of the total maximum score of 70 points (i.e., greater than 17.5 points). Competitive university programs set higher effective cut-offs based on candidate rankings.

How long is the Biology examination and what is the fee?

The examination lasts 150 minutes (2.5 hours). The official registration fee is 10 GEL per subject.

In what languages is the official examination offered?

NAEC sets this paper in Georgian. Eligible candidates, principally those whose general education was obtained in an occupied territory, may apply to NAEC in advance to sit history, mathematics, chemistry, geography, physics, biology, fine and applied arts, and civic education in Russian. Armenian and Azerbaijani versions exist for the General Skills test only, not for this subject. This practice bank is an English-language MCQ study adaptation and is not an official NAEC translation.

Free Practice Questions for Georgia Unified Biology

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