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100+ Free ECZ Biology 5090 Practice Questions

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2026 Statistics

Key Facts: ECZ Biology 5090 Exam

5090

ECZ subject code for School Certificate / GCE Biology

ECZ 2026 School Certificate timetable

50 min

Paper 5090/1 Biology 1 (objective) duration

ECZ 2026 School Certificate timetable

1 hr 45 min

Paper 5090/2 Biology 2 duration

ECZ 2026 School Certificate timetable

1–9

ECZ subject grade scale (1 highest, 9 fail)

Examinations Council of Zambia

K0 / K600 / K200

2026 fees: public/grant-aided SC free; private SC K600; GCE K200 per subject

exams-council.org.zm/fees

Mixed + SBA

Official format is written papers plus school-based practical; this bank is an MCQ study adaptation

MoE Biology syllabus assessment scheme / ECZ timetable

ECZ Biology 5090 is Zambia's O-Level biology subject: 50-minute objective Paper 1, 1 hour 45 minute Paper 2, plus school practical/SBA, graded 1–9. This free bank is an English MCQ study adaptation of the MoE syllabus, not an official-format simulation.

Sample ECZ Biology 5090 Practice Questions

Try these sample questions to test your ECZ Biology 5090 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In a scientific investigation, which step should come immediately after identifying a clear problem?
A.Publishing a conclusion in a journal
B.Forming a testable hypothesis
C.Discarding any data that do not fit a prediction
D.Changing two variables at the same time
Explanation: The inquiry sequence used in the MoE Biology syllabus is observation, identifying a problem, forming a hypothesis, testing it by experiment, recording and analysing data, then concluding. A hypothesis must be stated before the test is designed so the investigation has something specific to support or reject.
2A learner tests how light intensity affects the rate of photosynthesis in an aquatic plant. What is the independent variable?
A.The volume of oxygen collected
B.The species of plant used
C.The light intensity
D.The temperature of the water
Explanation: The independent variable is the factor the investigator deliberately changes. Here light intensity is set at different levels. The dependent variable is the measured response, such as oxygen volume. Temperature and plant species should be controlled so they do not confound the comparison.
3Which food-test reagent is heated with a sample and turns from blue towards brick-red if a reducing sugar is present?
A.Iodine solution
B.Benedict's solution
C.Biuret reagent
D.Ethanol
Explanation: Benedict's solution is blue because it contains copper(II) ions. When it is heated with a reducing sugar such as glucose, those ions are reduced and the colour moves through green and yellow to an orange or brick-red precipitate. The other reagents test for starch, protein or lipid and are not used this way.
4A leaf is boiled in water, then in ethanol, rinsed, and flooded with iodine. A blue-black colour in the lamina means the leaf contained which stored carbohydrate?
A.Cellulose only
B.Glycogen
C.Starch
D.Sucrose only
Explanation: Iodine solution forms a blue-black complex with starch. Boiling in water kills the leaf and makes it permeable; ethanol removes chlorophyll so the colour change is visible. Glycogen is an animal storage polysaccharide, and sucrose is a non-reducing sugar that does not give the iodine-blue-black result.
5A compound light microscope has a ×10 eyepiece and a ×40 objective in use. What is the total magnification of the image?
A.30×
B.50×
C.400×
D.4000×
Explanation: Total magnification is eyepiece magnification multiplied by objective magnification: 10 × 40 = 400. The image is therefore 400 times larger than the real specimen. Adding the two numbers, or inserting an extra zero, are common calculation errors.
6Potato cylinders of equal length are placed in sucrose solutions of different concentrations. After one hour the cylinder in distilled water is longest and the cylinder in concentrated sucrose is shortest. Which process best explains the results?
A.Active transport of sucrose into the potato cells
B.Osmosis of water into or out of the potato cells
C.Photosynthesis producing extra starch in distilled water
D.Protein denaturation in concentrated sucrose
Explanation: Water moves by osmosis from a higher water potential to a lower one across partially permeable cell membranes. In distilled water the cells gain water and the cylinder lengthens; in concentrated sucrose they lose water, become flaccid or plasmolysed, and the cylinder shortens. No metabolic pumping of sucrose is required to explain the length change.
7Which practice is required by scientific research ethics when people take part in a Biology investigation?
A.Collecting names and publishing them with the raw data
B.Changing results so that they match the hypothesis
C.Obtaining informed consent and protecting confidentiality
D.Excluding any participant whose results look unusual
Explanation: The MoE syllabus lists consent, honesty, confidentiality and non-discrimination among scientific ethics. Participants must understand the study and agree to take part, and their personal details must not be disclosed without permission. Fabricating data or quietly dropping inconvenient people violates honesty.
8When preparing a temporary slide of onion epidermis, why is iodine solution often added?
A.To dissolve the cellulose cell wall so organelles spill out
B.To stain starch grains and increase contrast of cell structures
C.To kill bacteria so the slide becomes a permanent mount
D.To make the cells carry out photosynthesis on the slide
Explanation: Unstained onion cells are almost transparent. Iodine stains starch and darkens cytoplasm and nuclei enough for a school compound microscope to show walls and contents. It is a staining technique, not a way to digest walls, sterilise a permanent mount, or switch on photosynthesis.
9Which organelle is the main site of aerobic respiration and ATP production in a plant or animal cell?
A.Ribosome
B.Golgi apparatus
C.Mitochondrion
D.Lysosome
Explanation: Mitochondria oxidise glucose (via pyruvate) in the presence of oxygen and produce most of the cell's ATP. Ribosomes assemble proteins, the Golgi modifies and packages materials, and lysosomes digest worn-out components. Plant cells also have chloroplasts, but those organelles capture light rather than carry out aerobic respiration.
10Which structure is found in a typical plant cell but not in a typical animal cell?
A.Cell-surface membrane
B.Cellulose cell wall
C.Mitochondrion
D.Nucleus
Explanation: Plant cells are surrounded by a rigid cellulose cell wall that supports the cell and helps it become turgid. Animal cells have only a cell-surface membrane. Both cell types have a nucleus and mitochondria. Chloroplasts and a large permanent vacuole are other plant-only features, but the wall is the structural difference named here.

About the ECZ Biology 5090 Exam

Zambia School Certificate / GCE Biology (5090) is the Examinations Council of Zambia Ordinary Level biology subject for Grade 12 school candidates and GCE candidates. Official assessment is mixed: written Paper 5090/1 (objective, 50 minutes), written Paper 5090/2 (1 hour 45 minutes), and school-based practical/SBA for school science. Content follows the Ministry of Education Biology syllabus for Forms 1–4 (cells, nutrition, photosynthesis, respiration, transport, excretion, homeostasis, coordination, reproduction, genetics, ecology, health, classification, and experimental skills). Results are reported on the ECZ 1–9 scale. The 100 questions on this page are an original English-language multiple-choice study adaptation — not leaked papers, not an official translation, and not a substitute for Paper 2 writing or practical/SBA.

Assessment

Written Paper 5090/1 Biology 1 (objective, 50 minutes) and Paper 5090/2 Biology 2 (1 hour 45 minutes), plus school-based practical/SBA for school science. This bank is an English MCQ study adaptation only.

Time Limit

Paper 5090/1: 50 minutes. Paper 5090/2: 1 hour 45 minutes. Practical/SBA is school-based and is not given a national Paper 3 item count here.

Passing Score

ECZ 1–9 subject scale (Grade 1 highest distinction; Grade 9 fail). Most tertiary programmes look for credits at Grade 6 or better; confirm current award and admissions rules with ECZ and the institution.

Exam Fee

Free for public and grant-aided School Certificate candidates. Private-school SC candidates pay K600 per candidate. GCE candidates pay K200 per subject (2026 ECZ fees). (Examinations Council of Zambia (ECZ))

ECZ Biology 5090 Exam Content Outline

12%

Cells and Cellular Life

Microscopy, cell types and organelles, specialised cells, membrane transport, enzymes, chemicals of life, and cell division.

16%

Nutrition, Photosynthesis and Respiration

Nutrients and deficiency disorders, autotrophic and heterotrophic nutrition, photosynthesis, digestion, and aerobic/anaerobic respiration.

10%

Transport

Plant vascular tissues, transpiration, blood, the heart, double circulation, vessels, blood groups, and lymph.

8%

Excretion and Homeostasis

Excretory organs and products, the nephron, ADH, thermoregulation, and blood-glucose control.

10%

Coordination and Response

Tropisms, hormones, neurones and reflex arcs, sense organs, and support and locomotion.

14%

Reproduction and Genetics

Plant and human reproduction, fertility and birth control, Mendelian inheritance, DNA, and variation.

10%

Ecology, Evolution and Conservation

Ecosystems, energy flow, nutrient cycles, pollution, Zambian biodiversity, natural selection, and evolution.

8%

Health and Disease

Infectious and non-infectious disease, vectors, immunity, and lifestyle risks.

6%

Classification

Life processes, kingdoms, taxonomic ranks, and dichotomous keys.

6%

Experimental Design and Safety

Inquiry steps, variables, food tests, magnification, ethics, and interpreting practical results.

How to Pass the ECZ Biology 5090 Exam

What You Need to Know

  • Passing score: ECZ 1–9 subject scale (Grade 1 highest distinction; Grade 9 fail). Most tertiary programmes look for credits at Grade 6 or better; confirm current award and admissions rules with ECZ and the institution.
  • Assessment: Written Paper 5090/1 Biology 1 (objective, 50 minutes) and Paper 5090/2 Biology 2 (1 hour 45 minutes), plus school-based practical/SBA for school science. This bank is an English MCQ study adaptation only.
  • Time limit: Paper 5090/1: 50 minutes. Paper 5090/2: 1 hour 45 minutes. Practical/SBA is school-based and is not given a national Paper 3 item count here.
  • Exam fee: Free for public and grant-aided School Certificate candidates. Private-school SC candidates pay K600 per candidate. GCE candidates pay K200 per subject (2026 ECZ fees).

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

ECZ Biology 5090 Study Tips from Top Performers

1Use the official MoE Biology syllabus (Forms 1–4) as a checklist — ECZ can examine any listed competence across Papers 1 and 2 and SBA.
2For Paper 1, practise four-option items under a 50-minute clock, then rework every miss with the explanation, not just the letter.
3Keep a one-page sheet of word equations (photosynthesis, aerobic and anaerobic respiration) and standard food-test colour changes.
4Treat practical items here as interpretation practice only: still complete school SBA, drawings, and real apparatus work.
5Paper 2 needs structured written answers. After an MCQ set, write a short explanation of the same idea in full sentences.
6Link Zambian public-health and environment examples (malaria, cholera, charcoal, soil, conservation law) to the syllabus process, not to invented statistics.

Frequently Asked Questions

What is ECZ Biology 5090?

Biology 5090 is the Examinations Council of Zambia School Certificate / GCE Ordinary Level biology subject. School candidates sit it as part of the Grade 12 School Certificate; private and upgrading candidates may sit it as GCE. The Ministry of Education Forms 1–4 Biology syllabus is the content source.

What is the official format of Biology 5090?

Official assessment is mixed. The 2026 School Certificate timetable lists written Paper 5090/1 Biology 1 (50 minutes, objective) and Paper 5090/2 Biology 2 (1 hour 45 minutes). School science also includes school-based practical/SBA. ECZ does not publish a single official item count for the subject, and this site does not invent a Paper 3 practical count.

Are these practice questions official ECZ items?

No. They are original English-language multiple-choice study items written to MoE syllabus themes. They are not leaked papers, not an official ECZ translation, and not a simulation of Paper 2 structured writing or school-based practical work.

How is Biology 5090 graded?

ECZ reports each subject on a 1–9 scale. Grade 1 is the highest distinction and Grade 9 is a fail. Credits commonly used for tertiary selection are Grades 1–6. Confirm current School Certificate award rules and university entry requirements with ECZ and the receiving institution.

What are the 2026 examination fees?

According to the Examinations Council of Zambia fees page, public and grant-aided School Certificate candidates do not pay (government-funded). Private-school School Certificate candidates pay K600 per candidate. GCE candidates pay K200 per subject.

What language is used on this practice page?

Stems, options and explanations are in English. Official ECZ Biology 5090 is also an English-medium written subject. This bank is still a study adaptation, not a past paper or a practical examination.