Free Practice Questions for Bac ST2S

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Exam Review

Key Facts: Bac ST2S Exam

The Bac ST2S STSS and CBPH speciality written exams each carry a coefficient of 16 (Ministere de l'Education nationale).

The CBPH exam lasts 4 hours, split into Chimie (coefficient 3) and Biologie et physiopathologie humaines (coefficient 13).

The STSS written exam lasts 3 hours and is built around the pole thematique of the programme.

A fifth Securite sociale branch, the branche autonomie, was created in 2020 and is managed by the CNSA.

The ST2S series had a baccalaureat pass rate above 83% at the 2025 session.

The Grand oral in ST2S draws on the STSS speciality and carries a coefficient of 14.

Continuous assessment counts for about 40% of the baccalaureat result, with terminal exams about 60%.

Normal fasting blood glucose in adults is about 0.7 to 1.1 g/L, with diabetes diagnosed at or above 1.26 g/L.

Two coefficient-16 written specialities: STSS over 3 hours and CBPH over 4 hours (Chimie coef 3 plus Biologie/physiopathologie coef 13). Pass with a 10/20 overall average; ST2S pass rate exceeded 83% in 2025.

Sample Bac ST2S Practice Questions

Try these sample questions to review concepts for the Bac ST2S exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In the French ST2S baccalauréat, what is the coefficient of the written exam in Chimie, biologie et physiopathologie humaines (CBPH)?

A.7

B.10

C.14

D.16

Explanation: The CBPH terminal written exam carries a coefficient of 16, the same weight as the STSS exam, making the two specialities together about a third of the final mark. The coefficient is split internally: 13 points for biology/physiopathologie and 3 for chimie.

2How long is the written terminal exam in Sciences et techniques sanitaires et sociales (STSS) in the ST2S series?

A.2 hours

B.3 hours

C.4 hours

D.5 hours

Explanation: The STSS written exam lasts 3 hours and is structured in two parts that each draw on the pôle thématique of the programme. It assesses students' ability to mobilise knowledge, analyse documents and write with rigour.

3Within the CBPH written exam, the chimie part is graded out of 20 points and carries which coefficient?

A.13

B.3

C.7

D.16

Explanation: The chimie part of CBPH is indicatively one hour long, graded on 20 points, and carries coefficient 3. The biology/physiopathologie part carries coefficient 13, giving the total exam coefficient of 16.

4The STSS programme is organised into two poles. Which two poles structure the teaching?

A.A clinical pole and a laboratory pole

B.A thematic pole and a methodological pole

C.A biological pole and a chemical pole

D.A national pole and a local pole

Explanation: STSS is built on a pôle thématique (understanding health and social questions and their handling in society) and a pôle méthodologique (methods for producing knowledge in health-social fields and running action projects). The thematic pole is split into four modules across première and terminale.

5Which STSS thematic module is studied specifically in the classe terminale?

A.Santé, bien-être et cohésion sociale

B.Protection sociale

C.Modes d'intervention en santé et action sociale

D.Politiques, dispositifs de santé publique et d'action sociale

Explanation: Three thematic modules are taught in première (Santé bien-être et cohésion sociale, Protection sociale, Modes d'intervention en santé et action sociale), while the terminale module is 'Politiques, dispositifs de santé publique et d'action sociale', which mobilises the première acquis to study health policies and the health system.

6In the French social protection system, which of these is one of the four traditional 'branches' of the Sécurité sociale?

A.Branche éducation

B.Branche logement

C.Branche maladie

D.Branche transport

Explanation: The French Sécurité sociale is organised into branches; the branche maladie (illness/health) is the classic risk covered, alongside vieillesse (retirement), famille and accidents du travail/maladies professionnelles, with autonomie added as a fifth branch in 2020.

7A fifth branch of the French Sécurité sociale was created in 2020 to cover which risk?

A.Unemployment

B.Loss of autonomy (dependence)

C.Natural disasters

D.Education costs

Explanation: The branche autonomie was created in 2020 and is managed by the CNSA. It funds support for loss of autonomy linked to ageing and disability, a growing need in an ageing population.

8How does the World Health Organization (WHO/OMS) define health, a definition central to the STSS programme?

A.The absence of disease or infirmity

B.A state of complete physical, mental and social well-being

C.The ability to work without restriction

D.A score on a standardised medical test

Explanation: The OMS defines health as 'a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity'. This positive, multidimensional definition underpins the STSS module on santé, bien-être et cohésion sociale.

9In CBPH biology, which organ plays the central role in regulating the milieu intérieur, notably water and mineral balance?

A.The liver

B.The kidney

C.The spleen

D.The pancreas

Explanation: The kidney (rein) filters blood and adjusts the excretion of water and ions, keeping the composition of the milieu intérieur constant. This regulation of the internal environment is a core terminale BPH topic.

10The functional unit of the kidney that filters blood and forms urine is called the:

A.Neuron

B.Alveolus

C.Sarcomere

D.Nephron

Explanation: The nephron is the functional unit of the kidney; each kidney contains around a million nephrons. It carries out glomerular filtration followed by reabsorption and secretion along the tubule to form urine.

About the Bac ST2S Exam

The Baccalaureat Technologique ST2S is the French upper-secondary diploma for the Sciences et Technologies de la Sante et du Social series. Its two terminal speciality written exams, each carrying coefficient 16, are Sciences et techniques sanitaires et sociales (STSS, 3 hours) and Chimie, biologie et physiopathologie humaines (CBPH, 4 hours). STSS analyses health and social issues, the Securite sociale, the French health system and public-health and social-action policies, alongside a methodological pole. CBPH combines a Chimie part (coef 3, biomolecules, imaging, food safety, medicines) with a Biologie et physiopathologie humaines part (coef 13, body functions, homeostasis, diabetes, immunity, heredity). Together with French, Philosophy and the Grand oral, these exams prepare students for paramedical, social and university health-social courses.

Exam sponsor: Ministere de l'Education nationale (France), via the rectorats d'academie. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

100 questions

Time Limit

STSS written exam: 3 hours. CBPH written exam: 4 hours.

Passing Score

Overall average of 10/20 across all coefficients; 8 to under 10 triggers an oral rattrapage; mentions from 12, 14 and 16.

Exam / Certification Fees

Free for enrolled candidats scolaires; the French baccalaureat carries no examination fee.

Exam sponsor website

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

Official sources

Ministere de l'Education nationale (France), via the rectorats d'academie: official exam information

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.

18%

Politiques et dispositifs de sante publique (STSS)

Health policies, the health system, ARS, national health strategy, prevention levels and social action.

16%

Protection sociale et systeme de sante (STSS)

Securite sociale branches, financing via cotisations, CSG and URSSAF, assurance maladie, PUMa, CSS, solidarity and universality.

12%

Sante, bien-etre et cohesion sociale (STSS)

Definition of health, determinants, social inequalities of health, health needs and social cohesion.

Methodologie en sante-social (STSS)

Epidemiology, study methods, data sources and the project approach with indicators and evaluation.

14%

Physiologie et regulation, homeostasie (CBPH)

Milieu interieur, kidney and nephron, glycaemia regulation, thermoregulation and feedback.

14%

Grandes fonctions et physiopathologie (CBPH)

Digestion, respiration, circulation, excretion and diseases such as diabetes, cardiovascular disease and infections.

10%

Immunologie et heredite (CBPH)

Self/non-self, innate and adaptive immunity, antibodies, lymphocytes, vaccination, chromosomes and DNA.

Chimie et biochimie (CBPH)

Biomolecules, pH and concentration, medical imaging, food safety, additives and from molecule to medicine.

Preparing for the Bac ST2S Exam

What You Need to Know

Passing score: Overall average of 10/20 across all coefficients; 8 to under 10 triggers an oral rattrapage; mentions from 12, 14 and 16.
Exam length: 100 questions
Time limit: STSS written exam: 3 hours. CBPH written exam: 4 hours.
Exam / certification fees: Free for enrolled candidats scolaires; the French baccalaureat carries no examination fee. Official sources

Using Our Practice Resources

Work through all 100 available questions
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Bac ST2S: Suggested Study Strategy

1Master the Securite sociale: learn the branches (maladie, vieillesse, famille, accidents du travail, and the 2020 autonomie branch) and financing through cotisations, CSG and URSSAF.

2Build a glossary of key STSS notions: determinants of health, social inequalities of health, prevention levels, ARS, PUMa, CSS and the OMS definition of health.

3For CBPH biology, draw and label regulation loops (glycaemia, thermoregulation, milieu interieur) so you can explain negative feedback and homeostasis clearly.

4Compare type 1 and type 2 diabetes side by side, and link immunity concepts (antigen, antibody, lymphocytes, vaccination) to real examples like influenza.

5Practise the document method: extract, sort and hierarchise information from graphs and tables, then argue with precise vocabulary, as the real exams reward clear structured answers.

6Revise CBPH chimie essentials: amino acids and peptide bonds, lipids and triglycerides, pH, molar concentration, and the from-molecule-to-medicine theme.

Frequently Asked Questions

What are the two main speciality exams in the Bac ST2S?

The two terminal speciality written exams are Sciences et techniques sanitaires et sociales (STSS, 3 hours) and Chimie, biologie et physiopathologie humaines (CBPH, 4 hours). Each carries a coefficient of 16, so together they make up about a third of the final mark.

How is the CBPH exam structured?

CBPH lasts 4 hours and has two independent parts on separate scripts: a Chimie part (about 1 hour, 20 points, coefficient 3) and a Biologie et physiopathologie humaines part (about 3 hours, 20 points, coefficient 13). Documents such as graphs, lab results and schemas can be provided.

What grade do you need to pass the Bac ST2S?

You pass with an overall weighted average of 10 out of 20. A score of 8 to just under 10 allows an oral rattrapage (resit), and mentions are awarded from 12 (assez bien), 14 (bien) and 16 (tres bien).

Is the real Bac ST2S exam multiple choice?

No. The official STSS and CBPH exams use structured questions and document analysis, not MCQs. This free practice bank uses multiple-choice questions to help you drill the same curriculum facts and concepts quickly before tackling full document-based questions.

Who can take the Bac ST2S and what does it lead to?

It is taken by terminale students in the ST2S series. It prepares for paramedical schools (nursing, etc.), BTS and BUT in health and social fields, IUT carrieres sociales and university health-social courses, and is administered by the Ministere de l'Education nationale.

What topics should I focus on for STSS and CBPH?

For STSS, focus on the Securite sociale and its branches, the French health system, public-health policies, prevention and methodology. For CBPH, focus on homeostasis, glycaemia and the pancreas, diabetes, immunity and vaccination, biomolecules, pH and from molecule to medicine.