KTET Category 3 Natural Science (Category III) February 2026 exam included questions from core Biology, Environmental Science, Physiology, Genetics, Ecology, and a large pedagogy block, and the list below is the tentative answer key for Questions 71–150 as per the provided document. This key is for reference and self‑evaluation only; final marks will depend on the official answer key released by Kerala Pareeksha Bhavan on the KTET portal.
The Kerala Teacher Eligibility Test (KTET) February 2026 exam for Category 3 Natural Science was conducted on 23 February 2026 in offline OMR mode. Many aspirants are now searching for the KTET Category 3 Natural Science answer key 2026 to calculate their expected score before the official key is released.
KTET 2026 Category 3 Exam Pattern
| Feature | Details |
|---|---|
| Exam name | Kerala Teacher Eligibility Test (KTET) 2026 – Category 3 |
| Purpose | Eligibility for High School (Classes VIII–X) teachers in Kerala |
| Mode | Offline, OMR-based test |
| Total questions | 150 MCQs |
| Total marks | 150 marks (1 mark per question) |
| Duration | 150 minutes (2½ hours) |
| Negative marking | No negative marking |
| Sections | Part I: Psychology & Pedagogy, Part II: Language, Part III: Subject content (incl. Natural Science) |
KTET Category 3 Natural Science Answer Key 2026 (Unofficial) – Q.71 to Q.150
| Q. No. | Question (Short Form) | Correct Answer (Tentative) |
|---|---|---|
| 71 | The first vascular plants are: | C |
| 72 | Malpighian body is a part of: | B |
| 73 | Choose the CORRECT statement. | D |
| 74 | ABA‑mediated stomatal closure occurs due to: | B |
| 75 | Which of the following is INCORRECT about Ctenophora? | C |
| 76 | Whorled phyllotaxy occurs in: | A |
| 77 | Amphibians first appeared in _______ period. | B |
| 78 | Assertion (A): Transpiration pull is the primary force responsible for ascent of sap in tall trees. Reason (R): It generates negative pressure in leaf xylem, pulling water upward through a continuous column. | D |
| 79 | Main site of light reaction in chloroplast is: | C |
| 80 | Step preventing self‑ligation of vector DNA during cloning: | C |
| 81 | Primary greenhouse gas released from paddy fields is: | B |
| 82 | Plant group with dominant haploid gametophyte, no vascular tissue, sporophyte dependent: | B |
| 83 | First step of respiration occurs in: | B |
| 84 | Auxin promotes: | B |
| 85 | A: Calyx is called persistent if it remains attached to the fruit. R: Persistent calyx is characteristic of plants with epigynous flowers. | D |
| 86 | Secondary growth fails in monocot stem because: | B |
| 87 | BOD is: | D |
| 88 | BOD is highest in: | B |
| 89 | Incorrect combination: | C |
| 90 | Guha and Maheswari attempted anther culture in: | A |
Questions 91 – 110 (Natural Science)
| Q. No. | Question (Short Form) | Correct Answer (Tentative) |
|---|---|---|
| 91 | Primary succession occurs in: | C |
| 92 | Mangrove ecosystem inhabited by Royal Bengal Tiger: | B |
| 93 | ATP yield in glycolysis: | A |
| 94 | ‘Birds are glorified reptiles’ was said by: | D |
| 95 | Male and female Ascaris respectively have: | C |
| 96 | According to cohesion‑tension theory, ascent of sap due to: | B |
| 97 | Choose CORRECT statement. | D |
| 98 | CORRECT statement regarding photophosphorylation: | C |
| 99 | (i) Residual volume definition. (ii) Tidal volume definition. (iii) Vital capacity definition. | C |
| 100 | Autosomal recessive disease caused by point mutation: | A |
| 101 | Vitamin present in NADP: | A |
| 102 | In ABO grouping, O refers to: | A |
| 103 | Annual rings form due to: | B |
| 104 | Inulin is polymer of: | A |
| 105 | Fungus reproducing asexually by conidia: | C |
| 106 | CORRECT about ozone depletion and global warming: | B |
| 107 | Projections in renal pelvis are called: | B |
| 108 | Collateral vascular bundles in dicot stem: | B |
| 109 | Choose CORRECT pair. | D |
| 110 | Primary lymphoid organs include: | C |
Questions 111 – 130 (Biotech, Reproduction, Pedagogy)
| Q. No. | Question (Short Form) | Correct Answer (Tentative) |
|---|---|---|
| 111 | WRONG statement: | D |
| 112 | Correct order of plant micropropagation steps: | B |
| 113 | Bt cotton is resistant to: | C |
| 114 | Red Data Book records: | C |
| 115 | Photophosphorylation producing only ATP not NADPH occurs in: | A |
| 116 | _______ is not an effect of soil pollution. | B |
| 117 | Interkinesis is between: | D |
| 118 | ZIFT is: | B |
| 119 | Chlorosis caused by deficiency of all except: | D |
| 120 | Meiosis results in: | B |
| 121 | Recommendation of NCF 2005: | C |
| 122 | Method moving from particular to general by observing examples: | D |
| 123 | Father of cognitive constructivism: | C |
| 124 | In Bloom’s revised taxonomy, breaking concept into parts, understanding relations: | B |
| 125 | Pillar of education encouraging reflection on values, beliefs, creativity: | D |
| 126 | Advance organizer was proposed by: | D |
| 127 | Integrated process skill in science: | B |
| 128 | In pedagogic analysis, “sequencing” means: | D |
| 129 | Activity providing most direct experience: | C |
| 130 | Step involving verifying or rejecting hypothesis in Experimental Method: | A |
Questions 131 – 150 (Science Education & Pedagogy)
| Q. No. | Question (Short Form) | Correct Answer (Tentative) |
|---|---|---|
| 131 | Science as a product comprises: | A |
| 132 | In McCormack and Yager’s taxonomy, attitude as process includes: | D |
| 133 | Year Government of India established NCERT: | B |
| 134 | Student proposing novel solution to reduce plastic waste – domain: | C |
| 135 | Formulating tentative explanation for phenomenon is: | C |
| 136 | Quality of a test ensuring it measures what it intends to measure: | D |
| 137 | Curriculum principle stressing preparation for real‑life situations: | C |
| 138 | Virtual class initiative of Kerala government: | B |
| 139 | Providing basis for promotion to next grade is function of: | A |
| 140 | Formative assessment mainly used: | B |
| 141 | Dalton Plan was developed by: | A |
| 142 | Student explains principle behind unusual cold climate in Kerala – domain: | B |
| 143 | Statutory body for planned, coordinated development of teacher education: | B |
| 144 | Nature of science – correct: (i) Science static. (ii) Science is process and product. (iii) Knowledge rigid. (iv) Knowledge based on enquiry. | B |
| 145 | Main objective of UNESCO Four Pillars of Education: | D |
| 146 | Statement best describing nature of scientific knowledge: | D |
| 147 | BSCS stands for: | B |
| 148 | Consistency of test scores from one measurement to another is: | C |
| 149 | Project‑based learning comes under which UNESCO pillar: | B |
| 150 | Teacher gradually withdraws support as learners gain competence – use of: | D |
How to Use KTET Natural Science Tentative Answer Key 2026
Candidates can use the tentative answer key to match their responses with the correct options and estimate their probable marks. For every correct answer, 1 mark is awarded and there is no negative marking as per standard KTET pattern.
Steps to calculate expected score (tentative):
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Count total number of correct answers in Natural Science and other sections.
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Multiply correct answers by 1 (no negative marks).
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Compare with category‑wise qualifying marks (60% for general, relaxation for reserved categories as per rules).
KTET 2026 Category 3 Minimum Qualifying Marks
The minimum qualifying marks are fixed as a percentage of the total 150 marks.
| Category | Minimum Percentage | Passing Marks (Out of 150) |
|---|---|---|
| General / Unreserved | 60% | 90 marks |
| OBC / SC / ST / PH | 55% | 82 marks |
These benchmarks are in line with the latest KTET qualifying rules used for recent sessions and are expected to remain the same for KTET 2026, unless revised by Kerala Pareeksha Bhavan.
How to Download Official KTET Category 3 Answer Key 2026
Once Kerala Pareeksha Bhavan releases the official answer key, follow these steps:
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Visit the official KTET website: ktet.kerala.gov.in.
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On the homepage, go to the “Answer Key / Download” or similar section.
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Click on the link “KTET 2026 Answer Key”.
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Select the correct Category (Category 3) and exam date/shift.
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Download the PDF and compare it with your responses.
The provisional answer key is released first, candidates can raise objections, and after evaluation, the final answer key is published and used for result preparation.
When Will Official KTET Answer Key 2026 Release?
Kerala Pareeksha Bhavan usually releases the provisional KTET answer key a few days after the exam on the official website, followed by the final key after resolving objections. Candidates can download category‑wise PDFs (including Category III Natural Science) from ktet.kerala.gov.in and cross‑check their responses accurately.
Disclaimer: This KTET Category 3 Natural Science answer key 2026 is an unofficial, tentative key prepared from memory-based questions and expert inputs for candidate reference only. It is not released or endorsed by Kerala Pareeksha Bhavan, and there may be variations from the official answer key. Candidates are strongly advised to verify all answers with the official KTET 2026 answer key and notification before making any final conclusions regarding their scores, qualification status, or future decisions.
