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Key Facts: Guinea Bac Sciences Expérimentales Exam
Coefficient 4
Biologie-Géologie Paper Weighting, 4-Hour Duration (Série SE)
Guinea Baccalauréat SE Biologie-Géologie paper header, 2020 session
10.00 / 20
Minimum General Average to Pass
DGECS-CP 2026 rattrapage communiqué
8.50 – 9.99
Average Range Eligible for the New Rattrapage Session
Ministry communiqué of 29 June 2026
7 Papers
Written Papers Sat by the Sciences Expérimentales Série
DGECS-CP 2026 examination timetable, published 18 May 2026
The Guinea Baccalauréat Sciences Expérimentales is the premier life and natural sciences secondary exit exam administered by DGECS-CP, qualifying students for medicine, pharmacy, and STEM higher education.
Sample Guinea Bac Sciences Expérimentales Practice Questions
Try these sample questions to review concepts for the Guinea Bac Sciences Expérimentales exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1In molecular biology, which enzyme is responsible for synthesizing a complementary messenger RNA (mRNA) strand from a DNA template during transcription in the cell nucleus?
2In human genetics, hemophilia A is an X-linked recessive disorder. If a carrier female (X^H X^h) has children with an unaffected male (X^H Y), what is the probability that a son born to this couple will be affected with hemophilia?
3What phenotypic segregation ratio is observed in the F2 generation of a Mendelian dihybrid cross involving two unlinked, independently assorting genes with complete dominance (e.g., crossing F1 heterozygous AaBb × AaBb)?
4Which specialized immune cells differentiate from activated B-lymphocytes and actively secrete large quantities of specific antibodies into bodily fluids?
5What is the primary ionic mechanism responsible for the rapid depolarization phase of a neuronal action potential?
6Which pituitary gonadotropin hormone triggers the rupture of the mature Graafian follicle and ovulation on approximately day 14 of a standard 28-day human ovarian cycle?
7In plate tectonics, what geological phenomenon occurs at a convergent boundary where a dense oceanic lithospheric plate plunges beneath a less dense continental plate?
8How are the vast Guinean bauxite deposits (such as those in Boké, Kindia, and Fria) geologically formed?
9During cellular aerobic respiration, what is the net yield of ATP molecules generated per molecule of glucose by substrate-level phosphorylation during cytoplasmic glycolysis?
10What is the function of the myelin sheath produced by Schwann cells around peripheral axons?
About the Guinea Bac Sciences Expérimentales Exam
The Baccalauréat Unique — Série Sciences Expérimentales (SE) is the premier national secondary school exit credential in the Republic of Guinea for students completing senior secondary education in the life, chemical, and physical sciences track. Administered annually by the Direction Générale des Examens et Contrôle Scolaire (DGECS) under the Ministry of National Education, Literacy, Technical Education and Vocational Training (which absorbed the former MEPU-A in January 2026), the Baccalauréat Unique certifies secondary graduation and serves as the competitive admission passport to faculties of medicine, pharmacy, dentistry, agronomy, environmental sciences, biochemistry, and polytechnics. The curriculum centers on deep biological knowledge — molecular genetics, human immunology, neurophysiology, reproductive biology, and Guinean ecology — paired with rigorous general and organic chemistry, classical and modern physics, calculus, and philosophy. Format and language note: the official examination is written in French and assessed through extensive experimental data interpretation, chemical balance equations, physics calculations, and philosophical essays, not multiple-choice questions. This site's practice bank is a 100-question English-language MCQ study adaptation of the official syllabus — a study aid for the underlying scientific principles. It is not an official translation, not an official-format simulation, and not a substitute for practicing French-language written problem solving.
Exam sponsor: Direction Générale des Examens et Contrôle Scolaire (DGECS). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Assessment
National secondary school exit examination organised annually by the DGECS-CP at the end of Terminale. The série Sciences Expérimentales (SE) sits seven written papers: Biologie-Géologie, Chimie, Physique, Mathématiques, Français, Anglais and Philosophie. Papers carry published coefficients — the 2020 SE Biologie-Géologie paper was headed 'Coefficient : 4, Durée : 4 heures' and the SE Physique paper 'Coefficient : 3, Durée : 3 heures' — and each is marked out of 20. From the 2026 session, candidates finishing the ordinary session with an average between 8.50 and 9.99 out of 20 may sit a rattrapage in at most two subjects, with priority to the specialty subjects; a resit mark replaces the ordinary mark only when it is higher, and a final average of at least 10.00/20 carries the same diploma.
Time Limit
Four written-paper days inside a five-day window; the 2026 ordinary session ran Monday 29 June to Friday 3 July 2026 with a rest day on Wednesday 1 July. The 2026 rattrapage session ran 20–23 August 2026.
Passing Score
Moyenne générale of at least 10.00/20 across the weighted papers
Exam / Certification Fees
Not published by DGECS-CP; registration is handled through the ministry platform www.dgecs.com and no examination fee is stated on the official notices
Exam sponsor websiteFees, 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.
Biologie-Géologie
Transcription and the genetic code, Mendelian and sex-linked inheritance, karyotype anomalies, immunity (plasma cells, MHC-I, memory, autoimmunity), neurophysiology (action potential, myelin, synapse, stretch reflex), endocrine regulation of glycaemia and the ovarian cycle, circulation and baroreflex, excretion, cell biology, bioenergetics, ecology of Guinea (Nimba, Ziama, mangroves, bowé), plate tectonics, metamorphism, seismology and lateritic bauxite.
Chimie
Strong-base pH, weak acid–base couples and half-equivalence, buffer chemistry, oxidation numbers, lead-acid accumulators, solubility products, mild oxidation of alcohols, Tollens' test, amino acids and the zwitterion, peptide bonds, saponification value, polymerisation, stereochemistry and catalytic cracking.
Physique
RC circuits and the time constant, capacitor energy, spring oscillators, Newton's law of cooling, electromagnetic induction and alternators, total internal reflection in optical fibres, the electromagnetic spectrum and medical imaging, acoustics, mass defect, beta decay, carbon-14 dating and D-T fusion.
Mathématiques
Derivatives of logarithmic, exponential, rational and product functions, exponential equations, integration by parts and definite integrals, exponential growth and decay models, conditional probability, and descriptive statistics and linear correlation.
Philosophie
Vitalism and mechanism, the experimental method (Claude Bernard), Bachelard's epistemological obstacle, Kant on natural purposes, Lévi-Strauss on nature and culture, bioethics (informed consent, germline editing) and Hans Jonas on responsibility.
Français
Francophone African literature (Mongo Beti, Ferdinand Oyono, Négritude), the dialectical dissertation and its synthesis, and figures of speech.
Anglais
Scientific and medical vocabulary, the mandative subjunctive, passive and conditional structures, and laboratory terminology.
Preparing for the Guinea Bac Sciences Expérimentales Exam
What You Need to Know
- Passing score: Moyenne générale of at least 10.00/20 across the weighted papers
- Assessment: National secondary school exit examination organised annually by the DGECS-CP at the end of Terminale. The série Sciences Expérimentales (SE) sits seven written papers: Biologie-Géologie, Chimie, Physique, Mathématiques, Français, Anglais and Philosophie. Papers carry published coefficients — the 2020 SE Biologie-Géologie paper was headed 'Coefficient : 4, Durée : 4 heures' and the SE Physique paper 'Coefficient : 3, Durée : 3 heures' — and each is marked out of 20. From the 2026 session, candidates finishing the ordinary session with an average between 8.50 and 9.99 out of 20 may sit a rattrapage in at most two subjects, with priority to the specialty subjects; a resit mark replaces the ordinary mark only when it is higher, and a final average of at least 10.00/20 carries the same diploma.
- Time limit: Four written-paper days inside a five-day window; the 2026 ordinary session ran Monday 29 June to Friday 3 July 2026 with a rest day on Wednesday 1 July. The 2026 rattrapage session ran 20–23 August 2026.
- Exam / certification fees: Not published by DGECS-CP; registration is handled through the ministry platform www.dgecs.com and no examination fee is stated on the official notices Official sources
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Frequently Asked Questions
What is the Guinea Baccalauréat Sciences Expérimentales examination?
The Baccalauréat Unique — Série Sciences Expérimentales (SE) is the official national secondary school exit credential in Guinea for students in the life and natural sciences track. It is the primary credential required for admission into faculties of medicine, pharmacy, biomedical sciences, agronomy, and biology.
What subjects are tested on the Baccalauréat Sciences Expérimentales?
The série Sciences Expérimentales sits seven written papers: Biologie-Géologie, Chimie, Physique, Mathématiques, Français, Anglais and Philosophie. Each is marked out of 20 and carries a coefficient printed on the paper — the 2020 SE Biologie-Géologie paper was headed 'Coefficient : 4, Durée : 4 heures' and the SE Physique paper 'Coefficient : 3, Durée : 3 heures'. DGECS-CP does not publish a consolidated coefficient table, so treat any full table quoted elsewhere as unverified.
What passing average is required on the Baccalauréat in Guinea?
Candidates must achieve a cumulative weighted general average (moyenne générale) of at least 10.00 out of 20 (≥ 10/20) across all written papers to obtain the Baccalauréat Unique diploma.
How does Sciences Expérimentales differ from Sciences Mathématiques?
Sciences Expérimentales focuses intensely on biological sciences, cellular biology, genetics, immunology, and chemistry, with applied calculus. Sciences Mathématiques focuses on advanced pure mathematics (complex numbers, 3D geometry, analysis) and theoretical physics.
Is there a resit session if I just miss the pass mark?
Yes, since the 2026 session. A ministry communiqué of 29 June 2026 created a rattrapage for candidates whose ordinary-session average falls between 8.50 and 9.99 out of 20. Candidates resit at most two subjects, with priority given to the specialty subjects, and a resit mark replaces the ordinary mark only when it is higher. A final average of at least 10.00/20 carries a diploma of identical academic and legal value. The first rattrapage ran 20–23 August 2026, with results on 2 September 2026.