100+ Free Bac Série D Côte d'Ivoire Practice Questions

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2026 Statistics

Key Facts: Bac Série D Côte d'Ivoire Exam

5,000 FCFA

Official candidate registration fee via TrésorPay/TrésorMoney

DECO MENA

200 / 400

Direct admission passing score threshold (10/20 average)

DECO

Medical & Bio Pathway

Primary feeder stream for Ivorian faculties of medicine and pharmacy

MENA Côte d'Ivoire

Free 100-question English MCQ study bank for Bac Série D Côte d'Ivoire. Official exam: French written papers in biology, physics-chemistry, and maths; pass with ≥200/400. Not an official-format simulation.

Sample Bac Série D Côte d'Ivoire Practice Questions

Try these sample questions to test your Bac Série D Côte d'Ivoire exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A sample of double-stranded DNA extracted from eukaryotic cell nuclei is analyzed and found to contain 22% adenine. According to Chargaff's rules of base pairing, what is the percentage of cytosine in this DNA sample?

A.28%

B.22%

C.44%

D.56%

Explanation: According to Chargaff's base pairing rules for double-stranded DNA, adenine pairs with thymine (A = T) and guanine pairs with cytosine (G = C). If adenine is 22%, then thymine is also 22%, totaling A + T = 44%. The remaining bases must be guanine and cytosine, totaling G + C = 100% - 44% = 56%. Because G = C, the percentage of cytosine is 56% / 2 = 28%.

2A segment of a DNA template strand reads: 3'-TAC GGC TTA CGA ATT-5'. During protein synthesis, what is the sequence of the resulting mRNA transcript, and how many amino acids will be incorporated into the peptide chain before termination?

A.5'-AUG CCG AAU GCU UAA-3'; 5 amino acids

B.5'-UAC GGC UUA CGA AUU-3'; 4 amino acids

C.5'-AUG CCG UUA GCU UAA-3'; 3 amino acids

D.5'-AUG CCG AAU GCU UAA-3'; 4 amino acids

Explanation: During transcription, RNA polymerase synthesizes mRNA complementary and antiparallel to the template DNA strand (A->U, T->A, C->G, G->C). Transcribing 3'-TAC GGC TTA CGA ATT-5' yields 5'-AUG CCG AAU GCU UAA-3'. During translation: AUG (Methionine), CCG (Proline), AAU (Asparagine), GCU (Alanine), and UAA (Stop codon). Because the stop codon terminates translation without coding for an amino acid, exactly 4 amino acids are synthesized.

3During eukaryotic DNA replication, what is the primary biochemical role of DNA ligase on the lagging strand?

A.Unwinding the parental double helix at the replication fork

B.Synthesizing short RNA primers required for polymerase binding

C.Catalyzing the formation of phosphodiester bonds between adjacent Okazaki fragments

D.Proofreading and removing mismatched nucleotides via 3' to 5' exonuclease activity

Explanation: On the lagging strand, DNA synthesis occurs discontinuously as a series of Okazaki fragments. After DNA polymerase replaces RNA primers with DNA nucleotides, DNA ligase seals the remaining nicks by catalyzing the formation of covalent phosphodiester bonds between the 3'-hydroxyl group of one fragment and the 5'-phosphate group of the adjacent fragment.

4A point mutation in the coding sequence of a gene replaces the codon 5'-UAC-3' (encoding Tyrosine) with 5'-UAA-3'. What type of mutation is this, and what is its expected phenotypic impact on the polypeptide?

A.Silent mutation; no change in polypeptide length or sequence

B.Missense mutation; substitution of a single amino acid with altered folding

C.Frameshift mutation; alteration of the entire downstream reading frame

D.Nonsense mutation; premature termination resulting in a truncated, nonfunctional protein

Explanation: The codon 5'-UAA-3' is one of the three standard universal stop codons (along with UAG and UGA). A base substitution that alters an amino acid-specifying codon into a stop codon is classified as a nonsense mutation. This leads to premature termination of translation and produces a truncated polypeptide that is typically nonfunctional or rapidly degraded.

5The genetic code is described as 'degenerate' or 'redundant'. What does this property mean in molecular biology?

A.Multiple distinct codons can code for the same amino acid

B.A single codon can code for multiple different amino acids depending on cellular context

C.Non-coding introns are removed during post-transcriptional splicing

D.The genetic code degrades over evolutionary time across different species

Explanation: Degeneracy (or redundancy) of the genetic code means that of the 64 possible triplet codons, 61 specify only 20 standard amino acids (with 3 stop codons). Consequently, most amino acids (except methionine and tryptophan) are encoded by more than one triplet codon (for example, leucine, serine, and arginine are each encoded by 6 different codons).

6In eukaryotic chromatin, what is the fundamental structural composition of a nucleosome core particle?

A.A tetramer of histone H1 wrapped by 300 base pairs of double-stranded DNA

B.A complex of non-histone scaffolding proteins and single-stranded RNA loops

C.An octamer of histone proteins (two each of H2A, H2B, H3, and H4) wrapped by approximately 146-147 base pairs of DNA

D.A dimer of histone H3 and H4 stabilized by zinc-finger transcription factors

Explanation: The nucleosome is the fundamental repeating subunit of chromatin. Its core particle consists of an octamer of basic histone proteins containing two copies each of histones H2A, H2B, H3, and H4. Approximately 146 to 147 base pairs of double-stranded DNA are wound around this histone octamer in roughly 1.65 left-handed superhelical turns. Histone H1 binds to the linker DNA region outside the core particle.

7In guinea pigs, black coat color (B) is completely dominant over brown coat color (b). A cross between two heterozygous black guinea pigs (Bb x Bb) produces a litter of 120 offspring. What is the statistically expected number of black offspring?

A.30 offspring

B.60 offspring

C.120 offspring

D.90 offspring

Explanation: A monohybrid cross between two heterozygotes (Bb x Bb) yields genotypes in the ratio 1/4 BB : 1/2 Bb : 1/4 bb. Because allele B is completely dominant, both BB (1/4) and Bb (1/2) express the black phenotype, giving a total probability of P(Black) = 1/4 + 1/2 = 3/4 (75%). For a total of 120 offspring, the expected number of black guinea pigs is 120 * (3/4) = 90 offspring.

8Two dihybrid individuals with independently assorting genes (AaBb x AaBb) are crossed. Assuming complete dominance at both loci, what is the probability of obtaining an offspring with the exact genotype AaBB?

A.1/16 (6.25%)

B.2/16 or 1/8 (12.5%)

C.3/16 (18.75%)

D.4/16 or 1/4 (25.0%)

Explanation: Because the two genes assort independently, the probability of obtaining a specific two-locus genotype is the product of the probabilities of the single-locus genotypes: P(Aa) from Aa x Aa is 1/2 (2/4), and P(BB) from Bb x Bb is 1/4. Multiplying these independent probabilities: P(AaBB) = P(Aa) * P(BB) = (1/2) * (1/4) = 1/8 = 2/16 (12.5%).

9A testcross is performed between a dihybrid female Drosophila with linked autosomal genes (AB/ab) and a double homozygous recessive male (ab/ab). The testcross produces 1,000 offspring with the following counts: 380 [AB], 380 [ab], 120 [Ab], and 120 [aB]. What is the genetic map distance between loci A and B?

A.12 cM (centimorgans)

B.24 cM (centimorgans)

C.38 cM (centimorgans)

D.76 cM (centimorgans)

Explanation: Recombinant phenotypes result from crossing over during female meiosis: [Ab] (120) and [aB] (120). Total recombinant offspring = 120 + 120 = 240. The recombination frequency (p) is calculated as: p = (Total Recombinants / Total Offspring) * 100% = (240 / 1000) * 100% = 24%. By definition, 1% recombination frequency corresponds to 1 map unit or 1 centimorgan (cM). Therefore, the genetic distance between loci A and B is 24 cM.

10Red-green color blindness in humans is an X-linked recessive trait (allele X^b). A woman with normal vision whose father was color blind marries a man with normal vision. What is the probability that their first son will be color blind?

A.50%

B.0%

C.25%

D.100%

Explanation: Because the woman's father was color blind (X^b Y), she must have inherited his X^b chromosome, making her an obligate carrier (genotype X^B X^b). The man has normal vision (genotype X^B Y). When having a son, the father always contributes his Y chromosome. The mother has a 50% chance of passing on X^B (normal vision son) and a 50% chance of passing on X^b (color-blind son X^b Y). Therefore, given that the child is a son, the probability of him being color blind is 1/2 or 50%.

About the Bac Série D Côte d'Ivoire Exam

Série D is the most popular scientific Baccalauréat series in Côte d'Ivoire. It provides the required academic foundation for university faculties of medicine (UFR Sciences Médicales), pharmacy (UFR Pharmacie), odonto-stomatology, agronomy (ESA at INP-HB), biochemistry, environmental sciences, and veterinary studies. Official papers evaluate biological reasoning, experimental protocol analysis, and physical-chemical calculations in French. This bank provides 100 English-language MCQs covering the complete Terminale D syllabus.

Assessment

Written papers in SVT (coeff 4), Physique-Chimie (coeff 4), Mathématiques (coeff 4), Français (coeff 3), Philosophie (coeff 2), Histoire-Géographie (coeff 2), and Anglais (coeff 2), plus EPS and oral tests.

Time Limit

Multi-day examination session (written papers held in June/July over 4 to 5 days, preceded by oral and physical tests).

Passing Score

Graded out of 400 total points; admission requires at least 200/400 (a 10/20 weighted average). Official candidates scoring 160–199 may be repêchés by the jury: 160–179 requires the pass mark in at least two matières spécifiques, 180–199 in at least one, and both bands require an annual school average (moyenne générale annuelle) of at least 10/20.

Exam Fee

5,000 FCFA (official candidate registration fee via TrésorPay/TrésorMoney; optional subjects +1,000 FCFA each) (Direction des Examens et Concours (DECO) / Ministère de l'Éducation Nationale, de l'Alphabétisation et de l'Enseignement Technique (MENAET))

Bac Série D Côte d'Ivoire Exam Content Outline

Study emphasis ~30%

Life & Earth Sciences (SVT)

Molecular genetics, protein synthesis, mendelian heredity, immunology (antibodies, T-cells, HIV), reflex arc, nerve impulse, and continental drift.

Study emphasis ~25%

Physical Sciences & Chemistry

Mechanics, circuits, chemical equilibrium, acid-base pH calculations, esterification, and organic reaction pathways.

Study emphasis ~20%

Mathematics

Analysis of exponential/logarithmic functions, definite integrals, probability laws, and statistics.

Study emphasis ~15%

French & Philosophy

Philosophical dissertation, literary commentary, epistemology, and argumentation.

Study emphasis ~10%

English & History-Geography

Reading comprehension, scientific terminology, and socio-economic geography.

How to Pass the Bac Série D Côte d'Ivoire Exam

What You Need to Know

Passing score: Graded out of 400 total points; admission requires at least 200/400 (a 10/20 weighted average). Official candidates scoring 160–199 may be repêchés by the jury: 160–179 requires the pass mark in at least two matières spécifiques, 180–199 in at least one, and both bands require an annual school average (moyenne générale annuelle) of at least 10/20.
Assessment: Written papers in SVT (coeff 4), Physique-Chimie (coeff 4), Mathématiques (coeff 4), Français (coeff 3), Philosophie (coeff 2), Histoire-Géographie (coeff 2), and Anglais (coeff 2), plus EPS and oral tests.
Time limit: Multi-day examination session (written papers held in June/July over 4 to 5 days, preceded by oral and physical tests).
Exam fee: 5,000 FCFA (official candidate registration fee via TrésorPay/TrésorMoney; optional subjects +1,000 FCFA each)

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

Bac Série D Côte d'Ivoire Study Tips from Top Performers

1Master biological schematics and mechanisms: synapse transmission, immune response stages, and meiosis phases.

2Practice monohybrid and dihybrid genetic cross calculations and linkage vs. independent assortment.

3Review acid-base titration curves, pH calculations, and buffer systems.

4Solve calculus problems involving ln(x) and exp(x) functions and their derivative applications.

Frequently Asked Questions

Is the official Bac Série D multiple-choice?

No. Official examinations consist of written biological syntheses, scientific document analyses, and problem sets in French. This bank is an English MCQ study adaptation.

What career paths are fed by Série D in Côte d'Ivoire?

Série D is the primary gateway to healthcare professions (medical doctor, pharmacist, dentist, midwife, nurse), agronomy, environmental science, biotechnology, and health research.

What is the passing score for Série D?

Candidates must achieve at least 200 points out of 400 (a 10/20 overall weighted average).

100+ Free Bac Série D Côte d'Ivoire Practice Questions

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