Choose a Form Four Biology exam category
Seven categories, in the order of the school year
Follow the school year from Mid-term 1 in March, through the terminal exams and the pre-national exams in August, to the regional mock exams. Use NECTA review papers, topical exams and online exams at any stage to practise the national format and fix weak topics.
1. Form Four Biology mid-term 1 exams
March papers that test the first topics of the year, with marking schemes.
Free 2025 sample paper2. Form Four Biology terminal exams
Papers set after the first half of the academic year to check progress on the work taught so far.
Free 2026 sample paper3. Form Four Biology mid-term 2 and pre-national exams
August papers set close to the national examination.
Free August 2026 paper4. Form Four Biology regional mock exams
Mock papers set by regions and zones across Tanzania before the national exam, with marking schemes.
Free 2026 zonal mock sample5. Form Four Biology NECTA review papers
Practise the national examination format with past CSEE papers.
Free 2025 CSEE paper6. Form Four Biology topical exams
Revise one topic at a time with questions grouped by topic, plus answers.
Free topic: Growth and development7. Form Four Biology online exams
Attempt multiple-choice tests online and see your answers straight away.
Free MCQ testsTry a free Form Four Biology sample
Three questions from the 2026 zonal mock exam (033/1 Biology 1)
How to use this sample: choose an option and click “Check Answer”. For the written question, answer on paper first, then click “View Answer”.
Multiple choice
(ii) A patient has been diagnosed with a low level of sugar in the blood. Which hormone will be recommended to regulate the patient's blood sugar level?
(iv) Which structure prevents food from entering the windpipe?
(x) Which changes are observed during inspiration?
Written question
5. During an experiment by Form Four students at Peramiho Girls Secondary School, they discovered that plants lose water through the stomata in the leaves.
(a) Name the physiological process investigated in this experiment.
(b) Outline four significances of the physiological process investigated.
Suggested answer and marking guide
(a) Process
Transpiration.
(b) Significance of transpiration
- Creates transpiration pull: Loss of water from the leaves pulls water and mineral salts up through the xylem.
- Cooling: Evaporation of water from the leaf surfaces cools the plant, especially in hot conditions.
- Distribution of mineral salts: The transpiration stream carries dissolved mineral salts from the roots to the aerial parts.
- Removal of excess water: Transpiration is a way of losing excess water from the aerial parts of the plant.
Like it? Open the Form Four Biology regional exams page or try the full 2026 terminal exam.
What Form Four Biology exams cover
Topics tested in the 2026 zonal mock paper
Paper 1 questions draw on work from across the course. The 2026 zonal mock paper tested these areas:
- Cell structure: prokaryotic cells and osmosis in plant cells
- Hormones: blood sugar, water balance and the nervous system
- Classification: tapeworms, conifers and flowering plants
- Breathing and respiration, including anaerobic respiration and oxygen debt
- The skeleton: axial and appendicular components
- Transpiration and the movement of water in plants
- Temperature regulation in mammals
- Cell division and genetics: meiosis and incomplete dominance
- Photosynthesis and the water cycle
- Communicable diseases, including HIV and AIDS
How to revise with Form Four Biology exams
A simple routine that works with any paper
Set a timer for the full three hours and answer on paper before opening any answers. Mark yourself with the marking guide, list the topics where you lost marks, and then revise those topics with the Form Four Biology topical exams before trying the next paper.
Practise more on the Click Online Academy app
Get Form 4 Biology mid-term, terminal, pre-national, regional mock and NECTA review papers with marking schemes, plus progress tracking and offline downloads. Free to download on Google Play.
Get Form Four Biology exams on Google Play Back to all Form Four examsFrequently asked questions: Form 4 Biology exams
Which Form Four Biology exams can I find here?
This page links to seven categories of Form Four Biology exams: Mid-term 1, terminal, mid-term 2 and pre-national, regional mock exams, NECTA review papers, topical exams and online exams. Each category has its own page.
Are the Form Four Biology exams free?
You can try free sample papers on the website, including the 2026 terminal exam and the 2026 zonal mock exam. More papers with marking schemes are on the Click Online Academy app on Google Play.
How do I use the interactive papers?
Choose an option for each multiple-choice question and click Check Answer to see whether you are right and why. For written questions, answer on paper first, then click View Answer to see the suggested answer and marking guide.
What does a Form Four Biology Paper 1 look like?
The 2026 zonal mock paper (033/1 Biology 1) lasts three hours and has eleven questions. Section A has multiple-choice and matching items, Section B has six short-essay questions, and in Section C you answer two of three essay questions.
Start the Form Four Biology exam sequence
Begin with Mid-term 1 and move through each category in order
Each category page links to the next one, so you can follow the whole school year without coming back here. Begin with the Form Four Biology Mid-term 1 exams.
Or return to all secondary exams.