KERALA TEACHER ELIGIBILITY TEST (KTET) – 2026
CATEGORY III (UPPER PRIMARY TO HIGH SCHOOL CLASSES)
PART–III: NATURAL SCIENCE (BOTANY & ZOOLOGY)
Paper Code: KTET-III-NS26
| Time Allowed: 2½ Hours | Maximum Marks: 150 |
| Roll Number: | Candidate Name: |
General Instructions to Candidates:
- This question paper contains multiple-choice objective items. Answer all questions matching your registered syllabus template.
- Each question carries 1 mark. There is no negative marking setup for incorrect attempts.
- Shade your final selected options carefully on the provided OMR Answer Sheet using a blue or black ballpoint pen.
- Do not write or sketch anything on the paper matrix except your registration profiles on the designated spaces.
CATEGORY – III
PART – 3
Natural Science
Question Numbers 71 to 150
71.
An amino acid that contains an aromatic ring in its side chain structure is :
72.
Which of the following compounds acts as an inhibitory neurotransmitter inside the central nervous system?
73.
Which one of the following cellular components is directly linked with the process of translation?
74.
During dark reactions in C3 plants, the primary product of carbon dioxide fixation is .
(Provide the exact biochemical abbreviation or full name)
75.
In biological terminology, IUCN stands for :
76.
Northern blotting technique is utilized for the dynamic analysis of polymers.
(State the macromolecule type without using options)
77.
The deposition of silica in the cell walls of leaves causing reduction in photosynthetic efficiency leads to a plant condition called :
78.
The complex structural framework inside mitochondria where ATP synthase enzymes are clustered is called :
79.
Based on the position of the centromere, a chromosome with the centromere situated perfectly at the middle terminal end is classified as :
80.
An evolutionary connecting link exhibiting characteristics of both Echinodermata and Chordata is .
(Provide the genus name of the organism)
81.
During anaerobic fermentation when organic acids are completely oxidized, the Respiratory Quotient (RQ) value will be :
82.
A major hormone produced by the adrenal cortex that increases blood glucose levels through gluconeogenesis is :
83.
Which among the following anatomical traits is applicable to a typical dicot root system?
84.
Which among the following terminologies or theories is NOT directly related to the mechanisms of organic evolution?
85.
Among those endangered species given below, which one is currently categorized under the ‘Critically Endangered’ category of the IUCN Red List?
86.
Ring porous woods showing prominent distinct growth rings are characteristic of seasonal plants growing in:
87.
Match the biological polymers with their respective functional monomers or structural groups and choose the correct option from the pool of choices:
| (a) | Proteins have | (1) | Phosphodiester bonds |
| (b) | Nucleic acids have | (2) | Glycosidic linkages |
| (c) | Polysaccharides have | (3) | Peptide bonds |
| (d) | Triglycerides have | (4) | Ester bonds |
| (a) | (b) | (c) | (d) | |
|---|---|---|---|---|
| (A) | (3) | (1) | (2) | (4) |
| (B) | (1) | (3) | (4) | (2) |
| (C) | (3) | (2) | (1) | (4) |
| (D) | (2) | (1) | (4) | (3) |
88.
If the endosperm of a gymnospermous plant has 12 chromosomes, how many chromosomes will be present in its leaf cells?
89.
According to modern evolutionary concepts, genetic drift operates most effectively in which type of population segment?
90.
A specialized aggregate fruit developing from a multicarpellary, apocarpous gynoecium is classified as a/an:
91.
Select the correct scientific family and order configuration for the Honeybee (Apis mellifera):
92.
Which of the following cellular processes directly leads to the formation of recombinants in sexually reproducing organisms?
93.
If the base sequence of a coding strand in DNA is 5′-GGATCC-3′, the corresponding sequence of bases in the transcribed mRNA will be:
94.
The 2020 Nobel Prize in Chemistry was awarded to Emmanuelle Charpentier and Jennifer A. Doudna for the development of:
95.
Vascular cambium activity leading to true secondary growth does not occur in most monocotyledonous plants, ___________ being a well-known structural exception.
96.
Select the CORRECT choice matching plant nutritional deficiencies with their characteristic diagnostic disorders:
| (a) | Boron | (i) | Whiptail of cauliflower |
| (b) | Molybdenum | (ii) | Dieback of shoots in Citrus |
| (c) | Copper | (iii) | Heart rot of sugar beet |
| (d) | Manganese | (iv) | Marsh spot of peas |
| (a) | (b) | (c) | (d) | |
|---|---|---|---|---|
| (A) | (iii) | (i) | (ii) | (iv) |
| (B) | (i) | (ii) | (iii) | (iv) |
| (C) | (ii) | (iv) | (i) | (iii) |
| (D) | (iii) | (iv) | (ii) | (i) |
97.
Anatomically, the ‘Tapetum’ is a specialized nutrient-rich cellular layer seen associated natively within the structural framework of the:
98.
Select the WRONGLY matched anatomical pair associated with the human nervous system:
99.
An autoimmune neuromuscular diagnostic condition characterized by chronic fatigue and progressive weakening of skeletal muscle tissue is: