100+ Free Cameroon GCE O-Level Biology Practice Questions

Prepare for the Cameroon General Certificate of Education Ordinary Level Biology (Subject Code 0510) exam with instant access — no signup required.

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62.01% pass rate in the June 2026 session (Cameroon GCE Board, Performance by Subjects, results released 21 August 2026) Pass Rate

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2026 Statistics

Key Facts: Cameroon GCE O-Level Biology Exam

50 MCQs / 2 Papers

Examination Structure

Cameroon GCE Board Official Examination Regulations

4 Hours

Total Written Time Across 2 Papers

CGCEB Examination Timetable

10,000 FCFA

Standard Candidate Registration Fee

MINESEC / Cameroon GCE Board Buea Fee Schedule

Grades A, B, C

Official Ordinary Level Pass Grades

Cameroon General Certificate of Education Board (CGCEB)

0510

Official Subject Code

Cameroon GCE Board Buea Subject Directory

The Cameroon GCE Ordinary Level Biology (Subject Code 0510) is administered annually in May/June by the Cameroon GCE Board (CGCEB), Buea, for Form 5 secondary school candidates. It is a two-paper subject — Paper 1 (50 compulsory MCQs, 1 hour 30 minutes) and Paper 2 (structured theory and essays, 2 hours 30 minutes) — covering cell biology, plant physiology, animal physiology, homeostasis, genetics and ecology, and is a normal prerequisite for Advanced Level science study in Cameroon.

Sample Cameroon GCE O-Level Biology Practice Questions

Try these sample questions to test your Cameroon GCE O-Level Biology exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which of the following biological processes correctly distinguishes excretion from egestion in living organisms?

A.Excretion is the elimination of undigested dietary fiber through the anus, whereas egestion removes toxic cellular products.

B.Excretion involves only the loss of water vapour through the skin, while egestion is the removal of mineral salts through the kidneys.

C.Excretion is the removal of toxic metabolic waste products formed inside body cells, whereas egestion is the expulsion of undigested food materials from the alimentary canal.

D.Excretion occurs exclusively in plants through stomata, whereas egestion occurs exclusively in animals through specialized excretory organs.

Explanation: Excretion is formally defined as the removal of toxic waste substances produced by cellular metabolism, such as urea, carbon dioxide, and excess mineral salts. In contrast, egestion is the expulsion of undigested, unabsorbed food residue (faeces) from the digestive tract through the anus, which has never crossed a cell membrane to participate in cellular metabolism.

2According to the binomial system of nomenclature developed by Carl Linnaeus, which of the following is the correct scientific format for writing the name of the common housefly?

A.Musca domestica (with the genus capitalized and specific epithet in lowercase, italicized or underlined)

B.musca Domestica (with the genus in lowercase and specific epithet capitalized)

C.Musca Domestica (with both genus and specific epithet capitalized)

D.musca domestica (with both genus and specific epithet in lowercase and unitalicized)

Explanation: In binomial nomenclature, each organism is assigned a two-part Latinized name. The first part is the genus name, which always starts with a capital letter, and the second part is the specific epithet (species name), which starts with a lowercase letter. The entire scientific name must be printed in italics or underlined when handwritten.

3A microscopic unicellular organism is isolated from stagnant water in Buea. Electron microscopy reveals that it contains circular DNA free in the cytoplasm, a peptidoglycan cell wall, and 70S ribosomes, but completely lacks a nuclear membrane and membrane-bound organelles. To which kingdom does this organism belong?

A.Kingdom Protista

B.Kingdom Monera (Prokaryotae)

C.Kingdom Fungi

D.Kingdom Plantae

Explanation: Organisms in Kingdom Monera (Prokaryotae), such as bacteria and cyanobacteria, are characterized by a prokaryotic cell organization. They lack a true membrane-bound nucleus and membrane-bound organelles like mitochondria and endoplasmic reticulum, possessing circular DNA (nucleoid), 70S ribosomes, and a peptidoglycan (murein) cell wall.

4Which combination of characteristics distinguishes organisms in Kingdom Fungi from organisms in Kingdom Plantae?

A.Fungi possess chloroplasts and autotrophic nutrition, whereas plants have chitinous cell walls.

B.Fungi possess cellulose cell walls and store starch, whereas plants store glycogen.

C.Fungi are exclusively unicellular prokaryotes, whereas plants are multicellular eukaryotes.

D.Fungi have cell walls made of chitin, lack chlorophyll, and exhibit heterotrophic saprophytic nutrition, whereas plants have cellulose walls and are autotrophic.

Explanation: Fungi are non-photosynthetic eukaryotic heterotrophs that obtain nutrients by absorbing organic compounds from dead matter (saprophytism) or living hosts (parasitism). Their cell walls are composed of chitin, and they store carbohydrates as glycogen. Plants, by contrast, are photosynthetic autotrophs with cellulose cell walls that store carbohydrates as starch.

5A student uses a dichotomous key to identify an arthropod collected during an ecological survey. The organism has two body regions (cephalothorax and abdomen), four pairs of walking legs, and lacks antennae and wings. Which class of arthropods does this organism belong to?

A.Class Insecta

B.Class Arachnida

C.Class Crustacea

D.Class Myriapoda

Explanation: Class Arachnida (which includes spiders, scorpions, ticks, and mites) is characterized by having two main body divisions (a fused head and thorax called the cephalothorax, and an abdomen), exactly four pairs of jointed walking legs (8 legs), chelicerae, and no antennae or wings.

6Which of the following cellular structures is present in typical mature plant cells but completely absent in typical animal cells?

A.Cellulose cell wall and a large permanent central vacuole

B.Mitochondria and 80S ribosomes

C.Phospholipid plasma membrane and nucleus

D.Endoplasmic reticulum and Golgi apparatus

Explanation: Plant cells possess a rigid outer cellulose cell wall that provides structural support and prevents osmotic lysis, chloroplasts for photosynthesis, and a large permanent central vacuole containing cell sap. Animal cells lack cell walls and chloroplasts, and only have small, temporary vacuoles if any.

7According to the fluid mosaic model, what is the fundamental structural composition and primary role of the eukaryotic cell membrane?

A.A rigid, impermeable layer of cellulose microfibrils that maintains cell shape.

B.A continuous solid sheet of structural proteins that prevents any water movement.

C.A dynamic phospholipid bilayer with embedded and peripheral proteins that controls the selective entry and exit of substances.

D.A porous network of peptidoglycan polymers that allows all dissolved solutes to pass freely.

Explanation: The cell surface membrane consists of a fluid phospholipid bilayer with hydrophobic hydrocarbon tails facing inward and hydrophilic phosphate heads facing outward. Globular proteins are embedded within (integral) or attached to the surfaces (peripheral) of the bilayer, creating a selectively permeable barrier that regulates the movement of substances into and out of the cell.

8Which organelle contains an inner folded membrane forming cristae and serves as the primary site of aerobic cellular respiration to generate ATP?

A.Chloroplast

B.Mitochondrion

C.Lysosome

D.Centrosome

Explanation: Mitochondria are the powerhouses of eukaryotic cells. They possess a smooth outer membrane and an inner membrane folded into cristae to maximize surface area for electron transport enzymes, where the Krebs cycle and oxidative phosphorylation take place to synthesize ATP during aerobic respiration.

9Which cellular organelle consists of small ribonucleoprotein particles attached to membranes that function specifically in the synthesis of proteins destined for export or membrane insertion?

A.Smooth endoplasmic reticulum

B.Golgi vesicle

C.Nucleolus

D.Rough endoplasmic reticulum (with ribosomes)

Explanation: The rough endoplasmic reticulum (RER) is studded with ribosomes on its cytosolic surface. Ribosomes assemble polypeptide chains from amino acids via translation, and the RER folds and packages these newly synthesized proteins into transport vesicles destined for the Golgi apparatus or secretion.

10How is a root hair cell structurally adapted to carry out its primary biological function efficiently?

A.It possesses a long tubular hair-like extension that greatly increases surface area for water and mineral ion absorption, and numerous mitochondria to generate ATP for active transport.

B.It has a thick lignified secondary cell wall to prevent water loss and withstand mechanical tension.

C.It contains numerous chloroplasts arranged around the periphery to carry out rapid photosynthesis.

D.It lacks a nucleus and cell membrane to maximize the internal volume available for starch storage.

Explanation: Root hair cells are specialized epidermal cells found near root tips. Their elongated, finger-like projection drastically increases the surface area-to-volume ratio for rapid osmosis of water and diffusion of minerals. Additionally, they contain abundant mitochondria that generate ATP to drive the active transport of mineral ions against their concentration gradients.

About the Cameroon GCE O-Level Biology Exam

The Cameroon General Certificate of Education (GCE) Ordinary Level Biology (Subject Code 0510) is a national terminal examination administered annually by the Cameroon GCE Board (CGCEB) in Buea; the June 2026 written phase ran from 2 to 18 June 2026. Designed for students completing Form 5 in secondary grammar schools, the 0510 syllabus provides candidates with a rigorous scientific foundation in biological principles, experimental methodology and environmental awareness. Biology is a two-paper subject: Paper 1 evaluates breadth of knowledge, conceptual clarity and calculation speed across 50 compulsory multiple-choice items (1 hour 30 minutes), and Paper 2 assesses in-depth theoretical understanding, biological reasoning and structured essay writing (2 hours 30 minutes). The Cameroon GCE Board states that only Food and Nutrition (0540), Special Bilingual Education French (0546) and Computer Science (0595) carry a practical component at Ordinary Level, so there is no Biology practical paper — experimental work such as food nutrient tests, microscopy, physiological experiments and ecological fieldwork is examined in writing. Achieving a passing grade (A, B or C) is a normal prerequisite for admission into High School science combinations. The Board reported a 62.01% pass rate in Biology in the June 2026 session. Format note: this site's practice bank is 100 four-option multiple-choice questions covering the whole official syllabus. Paper 1 of the real examination is genuinely multiple choice (50 compulsory questions), so the format matches that paper, but the bank is a study aid only — it does not simulate the written theory/essay paper(s) or any practical examination, and its length does not describe the official exam.

Assessment

Official Ordinary Level structure for subject code 0510 (Biology) per the Cameroon GCE Board June 2026 timetable (Form G6): Paper 1: 50 compulsory multiple-choice questions (1 hour 30 minutes); Paper 2: written theory/structured questions (2 hours 30 minutes). Total written time is 4 hours. The Board does not publish per-paper mark weightings for individual subjects.

Time Limit

Paper 1: 1 hour 30 minutes; total written time 4 hours.

Passing Score

Grade C or better (Cameroon GCE Ordinary Level grades A, B and C are passes; D and E are fails and U is ungraded)

Exam Fee

10,000 FCFA (Cameroon General Certificate of Education Board (CGCEB), Buea)

Cameroon GCE O-Level Biology Exam Content Outline

20%

Living Organisms, Cell Structure & Organization

Characteristics of living organisms (nutrition, respiration, excretion, growth, movement, sensitivity, reproduction), five-kingdom classification system (Monera, Protista, Fungi, Plantae, Animalia), binomial nomenclature, dichotomous keys, plant and animal cell ultrastructure, cellular organelles, specialized cells and their adaptations, tissue and organ organization, magnification formula calculations ($M = I / A$), diffusion, osmosis, turgidity, flaccidity, plasmolysis, and active transport mechanisms.

20%

Plant Nutrition & Transport

Internal and external leaf anatomy, chlorophyll pigments, photosynthesis chemical equation and light/dark reactions, limiting factors (light, carbon dioxide, temperature), experimental tests for starch, light, and chlorophyll, plant mineral nutrition (nitrogen, magnesium, phosphorus, potassium), xylem vessel structure and transpiration pull, phloem sieve tube structure and translocation, transpiration mechanism, stomatal action, and potometer measurements.

25%

Animal Nutrition, Respiration & Circulation

Human balanced diet components, vitamins, minerals, dietary fibre, nutritional deficiency diseases (kwashiorkor, marasmus, scurvy, rickets, anaemia), alimentary canal anatomy, mechanical and chemical digestion, digestive enzymes and optimal pH, bile functions, nutrient absorption in ileum villi, liver functions, human respiratory system anatomy, mechanism of breathing, alveolar gas exchange, aerobic and anaerobic respiration, oxygen debt, heart anatomy and cardiac cycle, blood vessels, blood components, double circulation, and ABO/Rhesus blood grouping.

15%

Excretion, Homeostasis & Coordination

Excretory products and organs, human urinary system, kidney anatomy, nephron structure and physiology (ultrafiltration in glomerulus, selective reabsorption in proximal tubule, loop of Henle, ADH regulation), kidney failure and dialysis, homeostasis and negative feedback, skin anatomy, thermoregulation mechanisms (sweating, vasodilation, vasoconstriction, shivering), central and peripheral nervous systems, neuron types, reflex arcs, eye anatomy, accommodation and pupil reflex, ear structure, and endocrine glands and hormones (insulin, glucagon, adrenaline, thyroxine).

20%

Reproduction, Genetics & Ecology

Asexual reproduction methods (binary fission, budding, spore formation, vegetative propagation) vs sexual reproduction, flower anatomy, insect vs wind pollination adaptations, double fertilization, seed and fruit formation, seed dispersal, seed germination requirements, human male and female reproductive systems, hormonal control of the menstrual cycle, pregnancy and placenta functions, sexually transmitted infections, basic Mendelian genetics (monohybrid crosses, dominant and recessive alleles, genotypes, phenotypes, test crosses), sex determination ($XX$/$XY$), variation, ecosystems, trophic energy transfer, food webs, ecological pyramids, carbon and nitrogen cycles, and conservation issues in Cameroon.

How to Pass the Cameroon GCE O-Level Biology Exam

What You Need to Know

Passing score: Grade C or better (Cameroon GCE Ordinary Level grades A, B and C are passes; D and E are fails and U is ungraded)
Assessment: Official Ordinary Level structure for subject code 0510 (Biology) per the Cameroon GCE Board June 2026 timetable (Form G6): Paper 1: 50 compulsory multiple-choice questions (1 hour 30 minutes); Paper 2: written theory/structured questions (2 hours 30 minutes). Total written time is 4 hours. The Board does not publish per-paper mark weightings for individual subjects.
Time limit: Paper 1: 1 hour 30 minutes; total written time 4 hours.
Exam fee: 10,000 FCFA

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

Cameroon GCE O-Level Biology Study Tips from Top Performers

1Master Biological Drawings & Labeling: Always use sharp HB pencils, draw clear continuous lines without shading, include magnification rules ($M = I / A$), and use horizontal ruled label lines without arrowheads.

2Understand Experimental Controls & Food Tests: Memorize color changes for standard biochemical tests—Benedict's test for reducing sugars (brick-red precipitate), Biuret test for proteins (purple/violet), Iodine test for starch (blue-black), and Emulsion test for lipids (milky-white emulsion).

3Differentiate Physiological Processes Clearly: Pay special attention to distinguishing between diffusion, osmosis, and active transport; aerobic and anaerobic respiration; and transpiration vs translocation.

4Practice Monohybrid Genetic Cross Layouts: Always state parental phenotypes, parental genotypes, gametes (circled), Punnett square cross, offspring genotypic ratio, and offspring phenotypic ratio clearly.

5Memorize Key Hormones and Their Target Organs: Know the exact sources and actions of insulin, glucagon, adrenaline, ADH, FSH, LH, oestrogen, and progesterone in regulating homeostasis and reproduction.

Frequently Asked Questions

What is the Cameroon GCE Ordinary Level Biology (Subject Code 0510)?

The Cameroon GCE O-Level Biology (0510) is a national secondary school leaving certificate examination administered by the Cameroon GCE Board (CGCEB) in Buea for Form 5 students. It tests fundamental biological concepts across cell biology, plant physiology, animal physiology, homeostasis, genetics, and ecology.

How is the 0510 Biology examination structured?

Biology 0510 is a two-paper subject. Paper 1 is 50 compulsory multiple-choice questions (1 hour 30 minutes) and Paper 2 is a written paper of structured short-answer and essay questions (2 hours 30 minutes), per the Cameroon GCE Board June 2026 timetable. There is no Biology practical at Ordinary Level. Per the Cameroon GCE Board, only Food and Nutrition (0540), Special Bilingual Education French (0546) and Computer Science (0595) carry a practical/third paper at Ordinary Level; the other eighteen subjects, including this one, are two-paper subjects. The Board does not publish per-paper mark weightings.

What grading scale is used for Cameroon GCE Ordinary Level subjects?

The Cameroon GCE Board reports Ordinary Level results on the letter scale A, B, C, D, E and U. Grades A, B and C are the passes counted in the Board's own Performance by Subjects statistics; D and E are fails and U is ungraded. The Board does not publish the percentage mark ranges behind these grades.

What are the registration fees for GCE O-Level Biology in Cameroon?

The Cameroon GCE Board publishes Ordinary Level fees as an 8,000 FCFA registration fee, a 1,000 FCFA fee per subject and 1,000 FCFA for franking of form G3 — 10,000 FCFA for a candidate entering Biology alone. The separate 5,000 FCFA practical fee does not apply to Biology, which has no practical paper. Candidates entering several subjects pay the registration and franking fees once.

What academic pathways require a pass in GCE O-Level Biology?

A passing grade (Grade A, B, or C) in GCE O-Level Biology is compulsory for admission into High School (Lower Sixth Science) offering A-Level Biology (0710), and serves as an essential foundation for university degrees in Medicine, Pharmacy, Nursing, Medical Laboratory Sciences, Agronomy, Biochemistry, and Environmental Biology across state and private universities in Cameroon.

100+ Free Cameroon GCE O-Level Biology Practice Questions

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