F4 BIOLOGY 1 2025 NATIONAL EXAMINATION
Download or view the 2025 BIOLOGY 1 Theory paper for Form 4. Use this paper for practice and revision, and follow the instructions provided by your teacher or school.
Examination Details
| Education level / Class | Form four |
|---|---|
| Subject | Biology 1 |
| Examination type | National Examination |
| Year | 2025 |
| Paper / Format | Paper 1 (PDF) |
| Source | TheElimu.com |
About This Examination
Examination time is three (3) hours. The paper have sections A, B and C with a total of 11 questions. The candidates is required to answer all the questions in sections A and B and two (2) questions from section C. The paper weigh a total of 100 marks.
Section A have two (2) questions. Question number 1 is a multiple-choice question, consisting of 10 items. Each, question weigh one (1) mark, making a total of 10 marks. Question number 2 is a matching-items question, with six(6) items. Each item carry one (1) mark, hence a total of six(6) marks. Therefore, the section weigh a total of 16 marks.
Section B consist of six (6) short answer questions. Candidates is required to answer all the questions. Each question carry nine (9) marks, hence a total of 54 marks in this section.
Section C comprise of three (3) essay questions each carrying 15 marks. The candidates is required to attempt two (2) questions. This section, therefore weigh a total of 30 marks.
The Form Four Biology 1 NECTA Examination Paper 2025 is an important revision resource designed to help students assess their understanding of Biology concepts and prepare effectively for the Certificate of Secondary Education Examination (CSEE). The paper covers a range of biological topics, including; Introduction to Biology, Safety in our environment, Health and immunity, Cell structure and organisation, Classification of living things, Nutrition, Balance of nature, Transport of materials in living things, Gaseous exchange and respiration, Movement, Co-ordination, Excretion, Regulation, Reproduction, Growth, Genetics, Evolution, Human Immunodeficiency Virus (HIV), Acquired Immune Deficiency Syndrome (AIDS) and Sexually, Transmitted Infections (STIs).
The examination provides students with an opportunity to practise different question formats, develop scientific reasoning, improve their ability to explain biological processes and apply classroom knowledge to real-life situations. It is particularly useful for Form Four students preparing for national examinations, teachers preparing revision exercises and candidates who wish to strengthen their examination techniques.
Students are encouraged to attempt the questions independently under timed examination conditions, review their responses and identify areas requiring further revision. They can also use the paper alongside Biology textbooks, classroom notes and the relevant NECTA syllabus to improve their subject knowledge and confidence before sitting for examinations.
How to Use the Paper
- Read the examination instructions carefully.
- Attempt the questions under suitable examination conditions.
- Review your answers and identify topics that need more practice.
- Use the marking scheme only if one is provided and verified.
View or Download the Examination
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Marking Scheme / Answers
The Marking Scheme for this paper is Available.
In Question 1: Each correct answer carries 1 mark (total 10 marks). In Question 2: Each correct pair is awarded 1 mark (total 6 marks). In Question 3 through 8: Marks are broken down step-by-step (typically 1 to 2 marks per valid point or key explanation) to ensure examiners can award partial credit accurately. In Question 9 through 11: Each question is worth 15 marks, typically divided logically such as 3 to 5 marks for introductory definitions or transmission/environmental factors, and 10 to 12 marks for the main preventive measures, adaptations, or detailed analyses.
You can view or download the marking scheme using the link below;
For students: Use this paper as a learning aid alongside your syllabus, class notes, and guidance from your teacher.
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