Are you searching for KTET previous question papers Category 3 Natural Science? Download available previous-year question papers, access official answer keys, understand the latest examination schedule and prepare using the complete KTET Natural Science syllabus.
The Kerala Teacher Eligibility Test (K-TET) is conducted by Kerala Pareeksha Bhavan to assess the eligibility of candidates for teaching positions. Category III is intended for teachers of Classes VIII to X.
Practising previous-year question papers helps candidates understand question formats, revise important biological concepts, improve time management and identify weaker areas before the examination.
Quick information
| Particulars | Details |
|---|---|
| Examination | Kerala Teacher Eligibility Test |
| Category | Category III |
| Subject | Natural Science |
| Conducting authority | Kerala Pareeksha Bhavan |
| Total questions | 150 |
| Natural Science section | 80 questions |
| Total marks | 150 |
| Upcoming examination | 14–15 November 2026 |
| Official website | ktet.kerala.gov.in |
KTET Category 3 Natural Science Previous Question Papers PDF Download
Candidates preparing for KTET Category III can use previous examination papers to become familiar with the questions asked in Natural Science.
The following resources include archived Natural Science papers and an official Category III model-question document.
| Year | Question paper | Download |
|---|---|---|
| 2019 | KTET Category III Natural Science Part III | Download 2019 PDF |
| 2018 | KTET Category III Natural Science Part III | Download 2018 PDF |
| Official model | KTET Category III Model Questions | Download Official PDF |
Important: The 2018 and 2019 PDFs are hosted in a third-party archive, and direct access could not be independently confirmed during this update. The official model paper is available on the Kerala Pareeksha Bhavan website. A Natural Science Part III paper is not the same as the complete 150-question Category III examination.
Candidates can also explore additional KTET Category III Natural Science question papers in a third-party online question archive.
How to prepare using KTET Natural Science previous papers
Start by downloading a previous-year paper and attempt the questions before checking any solutions.
During the first attempt, focus on accuracy rather than speed. Identify the chapters in which you make repeated mistakes, especially classification, physiology, genetics, ecology and science pedagogy.
During subsequent attempts, practise under examination conditions. Check the paper’s year, subject code and booklet code before comparing answers with a published key.
KTET Category 3 Natural Science Answer Key 2026
Kerala Pareeksha Bhavan has published answer-key resources for the February 2026 examination.
Candidates should distinguish between provisional and rectified answer keys. A rectified key may contain changes made after the authority reviews objections.
| Answer key | Official PDF |
|---|---|
| February 2026 Category III provisional answer key | View Provisional Key |
| February 2026 Category III rectified answer key | View Rectified Key |
| December 2025 Category III rectified answer key | View December 2025 Key |
February 2026 Natural Science answer key correction
The February 2026 rectified answer-key document records a cancelled question under Natural Science question code C715.
The corresponding question numbers are:
| Question set | Cancelled question number |
|---|---|
| Set A | 92 |
| Set B | 103 |
| Set C | 101 |
| Set D | 89 |
Candidates must use the correct question-set code while checking the official correction. The effect of a cancelled question on evaluation should be determined from the examination authority’s instructions.
Download the official rectified answer key
KTET Category 3 Natural Science Exam Date 2026
According to the official September 2026 KTET notification information, the examinations are scheduled for 14 November 2026 and 15 November 2026.
| Event | Date |
|---|---|
| Application commencement | 23 September 2026 |
| Original application closing date | 3 October 2026 |
| Extended registration closing date | 9 October 2026 |
| Scheduled admit card availability | 4 November 2026 |
| Examination dates | 14–15 November 2026 |
Candidates should check the latest notices and their admit cards for the exact examination date, session, reporting time and centre.
Check the official KTET notification
The question paper for the upcoming November examination is not yet available as of 24 October 2026. Students should use previous-year papers and official model questions for preparation.
KTET Category 3 Exam Pattern 2026
Understanding the KTET Category III exam pattern is important before beginning Natural Science preparation.
The examination includes questions from adolescent psychology, theories of learning, teaching aptitude, language and the selected subject.
| Section | Subject | Questions | Marks |
|---|---|---|---|
| Part I | Adolescent Psychology, Theories of Learning and Teaching Aptitude | 40 | 40 |
| Part II | Language | 30 | 30 |
| Part III | Natural Science | 80 | 80 |
| Total | 150 | 150 |
The Natural Science subject-specific section carries 80 out of 150 marks, making it a major component of the examination.
Preparation resources commonly divide this section into approximately 50 questions on Natural Science content and 30 questions on Natural Science pedagogy.
Candidates should consult the current official examination instructions for details such as duration, marking rules and permitted materials.
KTET Category 3 Natural Science Syllabus 2026
The KTET Category III Natural Science syllabus covers biological classification, plant biology, human physiology, genetics, ecology, biotechnology and pedagogy.
Candidates should prepare every major topic rather than studying only frequently repeated questions.
Complete Natural Science content syllabus
| No. | Topic | Important areas |
|---|---|---|
| 1 | Living World | Characteristics of living organisms, classification, binomial nomenclature |
| 2 | Biological Classification | Five-kingdom classification, bacteria, viruses, lichens |
| 3 | Plant Kingdom | Algae, bryophytes, pteridophytes, gymnosperms, angiosperms |
| 4 | Animal Kingdom | Non-chordates, chordates, classification and examples |
| 5 | Morphology of Angiosperms | Root, stem, leaf, flower, fruit and seed |
| 6 | Cell and Cell Division | Cell structure, organelles, mitosis, meiosis |
| 7 | Anatomy of Plants | Plant tissues and internal structures |
| 8 | Human Physiology | Digestion, respiration, circulation, excretion, nervous and endocrine systems |
| 9 | Reproductive Health | Reproductive health, contraception and assisted reproduction |
| 10 | Human Health and Diseases | Immunity, infectious diseases, vaccines |
| 11 | Reproduction in Plants | Sexual and asexual reproduction |
| 12 | Reproduction in Angiosperms | Pollination, fertilisation, seed development |
| 13 | Transport in Plants | Osmosis, diffusion, transpiration, water transport |
| 14 | Mineral Nutrition | Essential minerals, deficiency symptoms, nitrogen cycle |
| 15 | Photosynthesis | Light reaction, Calvin cycle, C3 and C4 pathways |
| 16 | Respiration in Plants | Glycolysis, Krebs cycle, aerobic and anaerobic respiration |
| 17 | Growth and Development | Plant hormones, photoperiodism, vernalisation |
| 18 | Inheritance and Variations | Mendelian genetics, crosses, genetic disorders |
| 19 | Molecular Basis of Inheritance | DNA, RNA, replication, transcription, translation |
| 20 | Enhancement of Food Production | Plant breeding, animal husbandry, tissue culture |
| 21 | Biotechnology | Genetic engineering, vectors and applications |
| 22 | Microbes in Human Welfare | Fermentation, biofertilisers, sewage treatment |
| 23 | Organisms, Populations and Ecosystems | Food chains, ecological interactions, energy flow |
| 24 | Environmental Issues | Pollution, climate change, environmental protection |
| 25 | Evolution | Evolutionary theories, natural selection and evidence |
| 26 | Biodiversity and Conservation | Biodiversity hotspots, protected areas, conservation |
This checklist is arranged for easier revision. For detailed subtopics and the authority’s original numbering, consult the official KTET Category III syllabus PDF.
KTET Natural Science Pedagogy Syllabus
Natural Science pedagogy focuses on how science is taught, understood and evaluated in the classroom.
| Topic | Areas to prepare |
|---|---|
| UNESCO’s Four Pillars of Education | Learning to know, do, live together and be |
| Goals of Biological Science Education | Scientific awareness, objectives and learning outcomes |
| McCormack and Yager Taxonomy | Domains of science education |
| Nature of Science | Scientific method, inquiry and process skills |
| Science Curriculum | Curriculum organisation and approaches |
| Planning for Instruction | Unit plans, lesson plans and pedagogical analysis |
| Teaching Methods | Demonstration, experimentation, project and inquiry methods |
| Teaching Resources | Audio-visual aids, laboratories, models and digital tools |
| Evaluation | Formative, summative and diagnostic assessment |
| Quality Assurance | Educational agencies and teacher professional development |
Important topics for KTET Natural Science preparation
Some topics deserve additional revision because they involve closely related concepts, processes or terminology that students may confuse.
Cell Biology and Cell Division: Understand the differences between mitosis and meiosis, identify major cell organelles, and revise the functions of chromosomes, ribosomes, mitochondria and membranes.
Plant Physiology: Revise photosynthesis, respiration, transpiration, mineral nutrition and plant growth regulators. Prepare comparisons such as C3 versus C4 photosynthesis.
Genetics and Biotechnology: Practise Mendelian crosses, DNA replication, transcription, translation and basic principles of recombinant DNA technology.
Human Physiology: Focus on endocrine glands, hormones, immunity, circulation, digestion, excretion and reproductive systems.
Ecology and Conservation: Understand ecosystem interactions, food chains, biodiversity, ecological succession, environmental pollution and conservation methods.
Science Pedagogy: Learn the differences between formative and summative assessment, inquiry-based learning, constructivism and practical teaching methods.
These are recommended revision priorities, not a prediction of the questions that will appear in the examination.
KTET Category 3 Natural Science Previous Question Paper Analysis
Previous-year question papers are useful not only for practising answers but also for identifying the types of knowledge a candidate needs.
The archived 2018 and 2019 Natural Science question-paper resources cover areas including plant physiology, biological classification, human biology, genetics and scientific terminology.
A good question-paper analysis should consider three factors.
Conceptual understanding: A question may test a basic definition or require the application of a biological principle. Memorising the name of a process is often less useful than understanding how it works.
Close alternatives: Multiple-choice questions frequently contain options that appear similar. Practise distinguishing related terms, organisms, structures and physiological processes.
Science teaching methods: Pedagogy questions may present classroom situations and ask candidates to select an appropriate method of teaching, assessing or supporting learners.
Candidates should create a chapter-wise error record after each practice paper and revise the concepts behind incorrect responses.
KTET Category 3 Natural Science Model Questions with Answers
The following 25 questions are original, syllabus-aligned practice questions prepared for MOQ Exams readers. They are not reproduced from official KTET previous-year papers.
Biology Practice Questions
1. Who popularised binomial nomenclature as a standard system of naming organisms?
A. Charles Darwin
B. Carl Linnaeus
C. Gregor Mendel
D. Louis Pasteur
Answer: B. Carl Linnaeus
Explanation: Binomial nomenclature gives an organism a two-part scientific name consisting of its genus and specific epithet.
2. Which plant group generally lacks true vascular tissues?
A. Bryophytes
B. Pteridophytes
C. Gymnosperms
D. Angiosperms
Answer: A. Bryophytes
Explanation: Bryophytes do not possess true xylem and phloem. Mosses and liverworts are familiar examples.
3. Which organelle is primarily associated with ATP production during aerobic respiration?
A. Golgi apparatus
B. Mitochondrion
C. Ribosome
D. Lysosome
Answer: B. Mitochondrion
Explanation: The mitochondrial inner membrane contains the electron transport chain and ATP synthase involved in oxidative phosphorylation.
4. Which cell division reduces the chromosome number during gamete formation?
A. Mitosis
B. Binary fission
C. Meiosis
D. Budding
Answer: C. Meiosis
Explanation: Meiosis reduces the chromosome number from diploid to haploid during the production of gametes in animals.
5. The light-dependent reactions of photosynthesis take place in the:
A. Stroma
B. Thylakoid membranes
C. Cytosol
D. Mitochondrial matrix
Answer: B. Thylakoid membranes
Explanation: Chlorophyll-containing photosystems and the light-reaction electron transport components are located in thylakoid membranes.
6. What is the first stable four-carbon compound produced during C4 carbon fixation?
A. Oxaloacetate
B. Ribulose bisphosphate
C. 3-phosphoglycerate
D. Glucose
Answer: A. Oxaloacetate
Explanation: In C4 plants, phosphoenolpyruvate carboxylase initially fixes carbon dioxide into oxaloacetate.
7. Which bacteria are associated with the oxidation of ammonia to nitrite?
A. Rhizobium
B. Nitrosomonas
C. Lactobacillus
D. Azotobacter
Answer: B. Nitrosomonas
Explanation: Nitrosomonas is an ammonia-oxidising bacterium involved in nitrification.
8. Which microorganism forms nitrogen-fixing symbiotic associations with legume roots?
A. Rhizobium
B. Penicillium
C. Saccharomyces
D. Euglena
Answer: A. Rhizobium
Explanation: Rhizobium bacteria form root nodules in many legumes and convert atmospheric nitrogen into biologically usable forms.
9. Which plant hormone is strongly associated with seed dormancy?
A. Gibberellin
B. Auxin
C. Abscisic acid
D. Cytokinin
Answer: C. Abscisic acid
Explanation: Abscisic acid plays an important role in promoting seed dormancy and regulating plant responses to stress.
10. Which plant tissue mainly transports water and dissolved minerals from roots?
A. Phloem
B. Cambium
C. Epidermis
D. Xylem
Answer: D. Xylem
Explanation: Xylem conducts water and dissolved minerals, generally from roots towards the aerial parts of the plant.
Genetics and Human Physiology Questions
11. What is the expected phenotypic ratio in a monohybrid test cross Aa × aa with complete dominance?
A. 3:1
B. 1:1
C. 9:3:3:1
D. 1:2:1
Answer: B. 1:1
Explanation: The heterozygous parent produces A and a gametes, while the recessive parent produces a gametes, resulting in equal dominant and recessive phenotypes.
12. DNA replication is described as:
A. Conservative
B. Semi-conservative
C. Dispersive only
D. Independent of a template
Answer: B. Semi-conservative
Explanation: Each newly formed double-stranded DNA molecule contains one parental strand and one newly synthesised strand.
13. Which technique is used to amplify a selected DNA sequence?
A. PCR
B. ELISA
C. Paper chromatography
D. Centrifugation
Answer: A. PCR
Explanation: Polymerase chain reaction uses repeated temperature cycles and DNA polymerase to produce copies of a target DNA sequence.
14. Insulin is secreted mainly by which cells of the pancreas?
A. Alpha cells
B. Beta cells
C. Delta cells
D. Acinar cells
Answer: B. Beta cells
Explanation: Beta cells in the pancreatic islets secrete insulin, which helps regulate blood glucose concentration.
15. Which organism causes malaria?
A. Plasmodium
B. Vibrio cholerae
C. Salmonella Typhi
D. Entamoeba coli
Answer: A. Plasmodium
Explanation: Malaria is caused by protozoan parasites belonging to the genus Plasmodium and transmitted by infected female Anopheles mosquitoes.
Ecology and Environmental Science Questions
16. Which organisms are commonly among the first colonisers of bare rock during primary succession?
A. Large trees
B. Lichens
C. Large mammals
D. Mature forest shrubs
Answer: B. Lichens
Explanation: Lichens can colonise exposed rock surfaces and contribute to early soil formation.
17. Which is an example of in-situ conservation?
A. Seed bank
B. Cryopreservation
C. National park
D. Tissue culture laboratory
Answer: C. National park
Explanation: In-situ conservation protects species within their natural habitats. National parks and wildlife sanctuaries are examples.
18. Which element is essential for the synthesis of thyroid hormones?
A. Iodine
B. Iron
C. Calcium
D. Magnesium
Answer: A. Iodine
Explanation: Iodine is a necessary component of thyroid hormones, including thyroxine.
Natural Science Pedagogy Practice Questions
19. Which statement best describes formative assessment?
A. It takes place only at the end of a year
B. It is used during learning to improve instruction
C. It cannot include feedback
D. It replaces classroom teaching
Answer: B. It is used during learning to improve instruction
Explanation: Formative assessment allows teachers to identify learning progress and provide timely feedback.
20. Which teaching approach encourages learners to investigate questions and use evidence?
A. Pure memorisation
B. Inquiry-based learning
C. Dictation-only teaching
D. Unsupervised repetition
Answer: B. Inquiry-based learning
Explanation: Inquiry-based learning develops observation, investigation, reasoning and evidence-based conclusions.
21. Which is one of UNESCO’s four pillars of education?
A. Learning to compete at all costs
B. Learning to live together
C. Learning to avoid cooperation
D. Learning only through lectures
Answer: B. Learning to live together
Explanation: UNESCO’s four pillars are learning to know, learning to do, learning to live together and learning to be.
22. Which teaching strategy best supports direct observation of plant structures?
A. Verbal explanation only
B. Specimen-based practical activity
C. Rote recitation only
D. No student participation
Answer: B. Specimen-based practical activity
Explanation: Using real specimens helps students observe structures and relate biological concepts to physical examples.
23. Effective lesson plans should align assessment activities with:
A. Learning outcomes
B. Teacher preferences alone
C. Textbook length alone
D. Random examination questions
Answer: A. Learning outcomes
Explanation: Learning outcomes define what students should know or demonstrate, helping teachers choose suitable activities and assessment methods.
24. What is an important purpose of diagnostic assessment?
A. Identifying learning gaps
B. Awarding final grades only
C. Replacing learning objectives
D. Ranking all schools
Answer: A. Identifying learning gaps
Explanation: Diagnostic assessment identifies existing knowledge, misconceptions and areas requiring additional support.
25. What is the main characteristic of a spiral curriculum?
A. Topics never recur
B. Concepts return with increasing complexity
C. Learning is unrelated to earlier lessons
D. Only one topic is taught
Answer: B. Concepts return with increasing complexity
Explanation: A spiral curriculum revisits concepts at progressively higher levels, allowing students to build upon previous knowledge.
Seven-Day KTET Category 3 Natural Science Study Plan
Candidates preparing for the upcoming KTET examination can use the following revision schedule.
| Day | Study plan |
|---|---|
| Day 1 | Living World, Biological Classification, Plant and Animal Kingdom |
| Day 2 | Cell Biology, Plant Anatomy, Transport, Photosynthesis and Mineral Nutrition |
| Day 3 | Human Physiology, Reproductive Health, Diseases and Plant Growth |
| Day 4 | Genetics, Molecular Biology, Biotechnology and Microorganisms |
| Day 5 | Evolution, Ecology, Biodiversity and Environmental Issues |
| Day 6 | Natural Science Pedagogy, Psychology and Language |
| Day 7 | Previous question-paper practice, answer review and revision |
How to improve your score using previous papers
Candidates should combine textbook revision with question-paper practice.
For each paper, record the number of correct and incorrect answers, identify unfamiliar scientific terms and revise the chapters connected to your mistakes.
Science pedagogy deserves regular attention because it requires understanding classroom practices, not merely memorising definitions.
Use official answer keys whenever possible, and make sure each key corresponds to the correct examination session and question-set code.
KTET Category 3 Natural Science Books and Study Materials
A good preparation plan does not require an excessive number of textbooks. Begin with reliable school-level science resources and the prescribed KTET syllabus.
SCERT Kerala Science Textbooks
SCERT textbooks covering Classes VIII, IX and X can strengthen foundational concepts in biology and environmental science.
NCERT Biology Textbooks
Higher-secondary NCERT Biology materials can help candidates revise genetics, plant physiology, molecular biology, biotechnology, human physiology and ecology.
KTET Category III Official Syllabus
The official syllabus should guide topic selection and prevent important areas from being left out.
Previous-Year Question Papers
Use previous papers to test knowledge and become comfortable with different question formats.
Official education resources:
Frequently Asked Questions About KTET Category 3 Natural Science
1. Where can I download KTET previous question papers Category 3 Natural Science?
You can access the archived 2018 and 2019 Natural Science question-paper links provided earlier in this article. Kerala Pareeksha Bhavan also provides official Category III model questions.
2. Is the KTET Category 3 Natural Science 2026 question paper available?
The upcoming September 2026 session is scheduled for 14–15 November 2026. As of 24 October 2026, its examination paper is not yet available. Candidates can use older question papers and official model questions.
3. How many questions are there in KTET Category 3 Natural Science?
The Category III paper contains 150 questions in total. The Natural Science subject-specific section contains 80 questions.
4. Is Natural Science different from Physical Science in KTET Category III?
Yes. Natural Science and Physical Science are distinct subject options with different subject-specific syllabuses and questions.
5. Where can I download the official KTET Natural Science syllabus?
The official Category III syllabus is available through the Kerala Pareeksha Bhavan website.
Download KTET Category III Syllabus PDF
6. What are the important topics for KTET Category 3 Natural Science?
Important revision areas include cell biology, plant physiology, genetics, human physiology, biological classification, evolution, ecology, biotechnology and science pedagogy. Every topic in the official syllabus should be covered.
7. Where is the KTET February 2026 Natural Science answer key?
Candidates can access the February 2026 Category III provisional and rectified answer keys through the official KTET website.
8. How should I practise previous-year question papers?
Attempt previous papers without referring to answers, identify mistakes, revise the relevant concepts, and repeat the exercise under timed conditions.
9. When will the KTET September 2026 examination be conducted?
The official notification currently schedules the September 2026 session examinations for 14 and 15 November 2026. Candidates should confirm their individual examination schedule from the official admit card.
Final Preparation Tips for KTET Category 3 Natural Science
Success in KTET Category III Natural Science requires a balanced approach to biological knowledge, teaching methodology and previous-question practice.
Candidates should focus on understanding scientific concepts, practising objective questions and reviewing their mistakes regularly.
Avoid depending exclusively on a small number of frequently repeated questions. The examination can assess any prescribed syllabus area.
For reliable examination updates, refer to Kerala Pareeksha Bhavan’s official KTET website.
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Editorial note: This article is independently prepared for educational purposes. MOQ Exams is not affiliated with Kerala Pareeksha Bhavan. Official examination notices and PDFs remain the authoritative sources.