GATE 2026 Life Sciences
113 questions across 1 session
Suresh said, "I did it yesterday." Which one of the following options is the correct form of this sentence in indirect speech?
To continue the sequence of tiles shown, the tile indicated by the question mark should be
Consider an art gallery whose walkways are shown as lines in the diagram. A black dot represents a junction of two walkways. A guard may be placed at a junction to watch over the w...
The 2nd of June is a Thursday in a certain year. Which day of the week is the 3rd of July in that year?
A coin with heads facing up is shown as H and a coin with tails facing up is shown as T . Six coins are placed in the Starting Arrangement, as shown in the figure below. A "step" i...
Exacerbate : Mitigate :: ________ : ________ Choose the option with the correct pair of words to fill the blank.
A paper shown in Panel I is folded along the dashed lines (---) to construct a cube. The shaded regions shown in Panel I appear on the outer surface of the cube. Referring to cubes...
In a population, patients who have high cholesterol also have high blood-pressure (BP). Some patients with high BP also have diabetes. There are no patients who have both high chol...
Four people P, Q, R, and S, of different ages, make the following observations. P - I am younger than S. Q - I am neither the youngest nor the oldest. R - P is older than me. Based...
Circles C1, C2, and C3, with centers O1, O2, and O3, and radii r1, r2, and r3, respectively, touch each other as shown in the following figure. Given r1 = 2 cm, r2 = 1 cm and the a...
10 mM aqueous HCl is added dropwise to 10 mL of 1 mM aqueous NaOH. The qualitative plot of conductivity (y) against the number of drops of HCl (x) is
Upon hydrolysis of the pentapeptide Glu-Arg-Gly-Phe-Ala (represented from N- to C- terminus) with trypsin, the peptide fragments obtained are
The major product formed in the following reaction is COOH COOH conc. HNO3 30 °C
The CORRECT order of ionic character (in percentage) among the following is
The CORRECT combination(s) of element and their ground state electronic configuration is/are (Atomic Numbers: Ar-18, Sc-21, Cr-24, Mn-25 and Fe-26)
The major component(s) of phosphate buffer at physiological pH of 7.4 is/are
The total number of distinct stereoisomers for the following compound is ____________ (in integer). [Image of chemical structure: H3C-CH(Cl)-CH(Cl)-CH3]
For the reaction A → products, the half-life is independent of the initial concentration of A. The order of the reaction is ____________ (in integer).
Among the following, the number of molecules possessing one or more lone pairs on the central atom is ____________ (in integer). BeCl2 SnCl2 BF3 NH3 SF4 PF5 and SF6
An ideal gas in an insulated container expands against zero external pressure. For this expansion, the CORRECT statement is
The major products P and Q obtained in the following reactions are
The major product formed in the following two-step transformation is (Note: Ts = tosyl and Ac = acetyl) [Diagram of reaction: Reactant 1 (sugar derivative with AcOCH2C, OAc, AcO gr...
Match the coordination complexes given in Column I with their most appropriate properties in Column II. (Given: Atomic number of Mn-25; Co-27; Cu-29): Column I Coordination Complex...
The CORRECT statement(s) about a competitive inhibitor of an enzyme is/are
Among the following, the occupied molecular orbital(s) of carbon monoxide is/are
The option(s) with the CORRECT order of ionisation energy is/are
The pH of 10-8 M HCl (aq.) is ________ (rounded off to two decimal places). Given, pKw = 14.
Which one of the following immunoglobulins is known for its role in both allergy and asthma?
In which kind of organism, the glycerol moiety of lipid is found primarily in the R-configuration?
The Kennedy pathway of cellular phospholipid biosynthesis is associated with _________.
Which of the following options show(s) the correct pairing of a complement protein with its function?
Fluorescence is a result of which one or more of the following?
A 25 amino acid α-helical protein is spanning the thickness of a mammalian cell membrane. Using the average dimensional parameters of a typical α-helix, the thickness of the membra...
The oxidative phase of the hexose monophosphate pathway generates ______ moles of NADPH per mole of glucose 6-phosphate (answer in integer).
Partial double digestion of the DNA shown below with EcoRI, and XhoI will yield ______ bands after gel electrophoresis (answer in integer).
Chymotrypsin cleaves polypeptides preferentially on the carbonyl side of aromatic, and some other bulky nonpolar residues. Trypsin cleaves on the carbonyl side of positively charge...
Which one of the following enzymes is NOT inhibited by glucose-6-phosphate?
The following diagram represents energy states of different protein folding steps, which includes- 1. Folded 2. Transition 3. Molten globule 4. Unfolded Find the correct match of f...
The correct path of transfer of electrons in the light harvesting photosystems in vascular plants is _________.
For a simple enzyme that follows Michaelis-Menten kinetics, kinetic data was collected in the absence (dotted line, -I), or presence (solid line, +I) of an uncompetitive inhibitor...
Which statement(s) is/are true about the 5'-capping of eukaryotic mRNA?
Which of the following statements about pertussis toxin is/are NOT true?
Telomerase has which one or more of the following activities?
To a 10 × 10⁻⁹ M solution of a receptor, its specific ligand was added, and incubated. At equilibrium, the concentration of the free ligand was 5 × 10⁻⁹ M, and the concentration of...
Assuming that there are 5 × 10¹³ cells in the human body, and that ATP is turning over at a rate of 10⁹ ATP molecules per minute in each cell, then the human body is utilizing ____...
A solution shows a transmittance of 20% when taken in a cuvette of 2.5 cm path length. If the molar absorption coefficient of the solution is 12000 dm³/mol.cm, the concentration of...
Which one of the following plant families is characterized by the gynobasic style of female reproductive organ?
Which one of the following plant organs typically exhibits all the four features listed below? (i) Starch-enriched endodermis (ii) Conjoint, collateral and open vascular bundle (ii...
Correctly match the following molecules/methods in Group-I with their major uses in Group-II. Group-I (P) CRISPR-Cas9 (Q) DNA Microarray (R) Vir genes (S) RAPD Group-II (1) Global...
Which one of the following commercial products is used as a systemic fungicide to control plant diseases?
Which one of the following terms best describes the plants that are adapted to grow in acidic soil?
Which of the following plant genera is/are example(s) of partial stem parasite?
Which of the following amino acids contain(s) only one chiral center?
If an endosperm cell of a typical diploid angiosperm species has 15 chromosomes, then the number of chromosomes in a microspore mother cell of this species under normal circumstanc...
Which one of the following class(es) of genes, when deleted, would result in sepal formation in all the floral whorls of Arabidopsis, as per the rules of the typical ABC model of f...
Correctly match the following molecular assemblies in Group-I with their functions in Group-II. Group-I (P) Photosystem I (Q) Photosystem II (R) Cytochrome b6f complex (S) CF0-CF1...
Correctly match the following secondary metabolites in Group-I with their chemical classes in Group-II. Group-I (P) Codeine (Q) Podophyllotoxin (R) Resveratrol (S) Linamarin (T) Li...
Correctly match the following plant diseases in Group-I with their causal organisms in Group-II. Group-I (P) Red rot of sugarcane (Q) Tikka disease of groundnut (R) Late blight of...
Correctly match the following plant species in Group-I with their main economically important products in Group-II. Group-I (P) Gossypium arboreum (Q) Dalbergia sissoo (R) Hevea br...
Two genes X and Y are involved in root development in such a way that all the following three homozygous mutants show rootless phenotype. (i) Gain-of-function mutant of X (ii) Loss...
Which of the following combinations of photosynthetic carbon cycle in plants, and its matched biochemical reaction is/are correct?
Choose the correct combination(s) of alkaloid, source plant, and their main commercial use.
Which of the following statements is/are correct about plant movement?
Two completely linked genes A and B regulate plant height and flower colour, respectively, wherein the recessive mutant aa is dwarf bearing red flowers and the recessive mutant bb...
An enzyme following Michaelis-Menten kinetics, catalyses a reaction with an initial velocity (V₀) of 2 µM s⁻¹ at the substrate concentration of 10 µM. If the turnover number (kcat)...
Which one of the following statements about microbiological stains is CORRECT?
The genome of which one of the following viruses encodes reverse transcriptase?
Protoplasts can be generated from
Which one of the following molecules is the master regulator of the planktonic-surface transition in Pseudomonas aeruginosa during biofilm formation?
Which one of the following is a protozoal disease?
Which one of the following drugs is a viral protease inhibitor?
In Escherichia coli, the minimum number of crossovers required between F- genome and the linear DNA transmitted by Hfr to form a viable recombinant is ________. (Answer in integer)
The decimal reduction time of Escherichia coli at a particular temperature is one minute. Assuming no bacterial growth and constant death rate, the time required for one million ba...
Which one of the following options correctly matches the microbial names in Column I with their corresponding sources of epithet in Column II? Column I (P) Klebsiella pneumoniae (Q...
Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]. Assertion [a]: Silver and copper display bacteriocidal or antiseptic activity. Reason [r]:...
When tryptophan level is low in Escherichia coli, the expression of tryptophan biosynthesis genes is turned on through an antiterminator stem-loop formation between
The effect of mutations in a gene at their transcriptional and translational levels were analyzed using Northern (N) and Western (W) blot techniques, respectively. The following fi...
Which one of the following leukocytes is the most abundant in a healthy human?
DNA amplification in the polymerase chain reaction is
In bacteriophage lambda (λ) life cycle, binding of Cro protein to cI gene operator region
Which of the following is/are ring(s) of bacterial flagellum?
Which of the following bacteria is/are uncultivable?
Which of the following antibiotic(s) inhibit(s) bacterial protein synthesis?
Scientist(s) who contributed in disproving the theory of spontaneous generation is/are
A researcher sets up ten large outdoor tanks, each containing the same amount of algae and the same number of guppies (herbivorous fish). In five of these tanks, she also adds gour...
Immunoglobulins are classified into the following isotypes: IgG, IgM, IgA, IgD, IgE. What region of the immunoglobulin is used to determine this classification?
Correctly match the cell types in Column I to their primary function in Column II. Column I P) Melanocyte Q) Myocyte R) Granulosa S) B-cell Column II 1) Muscle contraction 2) Pigme...
Which one of the following groups includes at least one animal that is NOT an arthropod?
Females of many insect species mate with multiple different males. Which of the following is/are an adaptive explanation(s) for multiple mating in insects?
Which one or more of the following terms describe(s) Toxoplasma gondii?
Which of the following statements is/are NOT correct about the technique used in molecular biology?
Assume that in the oxidative branch of the pentose phosphate pathway, each glucose-6-phosphate molecule generates the following products: 2 molecules of NADPH, 1 molecule of CO2 an...
Muscle performance is positively correlated with Darwinian fitness. The graph below describes the relationship between mean environmental temperature and muscle performance for two...
In eukaryotic cells, a mutation reduces the enzymatic activity of pyruvate dehydrogenase by 90%, without affecting expression. Under aerobic conditions, which one of the following...
Which one of the following describes the role of enhancers in eukaryotic gene regulation?
Retes are networks of outgoing arteries and returning veins that create a counter-current pattern. Retes in the flippers of seals that live in temperate areas function as
Researchers measure the activity of an enzyme in the presence of an inhibitor. They observe that • Vmax of the enzyme remains unchanged at saturating substrate concentration • Km i...
Below are the numbers of individuals of migratory green warblers and the frequencies of three genotypes at a single locus for this species. F refers to the allele for faster migrat...
A drug was developed to inhibit histone acetyl transferase in eukaryotic cells. Cells treated with this drug have more compact chromatin and show reduction in transcription of seve...
Two species of snakes, Species P and Species Q, have overlapping geographic distributions. Species P mainly eats rodents, whereas Species Q mainly eats invertebrates. Which one or...
In rivers that range in salinity (ppt) from low to high, researchers found that the aquatic snail species P (solid curve) and Q (dashed curve) were distributed according to the pat...
Which of the following statements is/are correct for the phylogenetic tree depicted below?
In her exploration of the Western Ghats, Dora finds four new species of fungi. Below is the DNA sequence alignment for a single locus from these new species that she calls Yeti, Un...
Ergotism is caused by ingestion of grains infected with
Match the bacteria in Column I with their respective characteristic features in Column II. Column I (P) E. coli (Q) B. subtilis (R) S. aureus (S) L. monocytogenes Column II (1) Gra...
Carmine, a food colorant, is derived from
Which one of the following carbohydrates is NOT a storage polysaccharide?
Which one of the following statements is true for a high-pressure homogenizer?
Coconut oil contains a small fraction of unsaturated fatty acids, but still has a low melting point due to the presence of
Which of the following amines, produced as a result of protein degradation, is/are foul smelling?
Water is flowing at 100 litres/min through a pipe with a diameter of 5 cm. Assume the coefficient of viscosity of water to be 0.001 Pa.s and the density to be 1000 kg/m³. The Reyno...
Match the toxins in Column I with their respective sources in Column II. Column I P. Aflatoxin Q. Nisin R. Fumonisin S. Shiga-like toxin Column II 1. Fusarium verticilloides 2. Ent...
Match the vitamins in Column I with their respective coenzyme forms listed in Column II. Column I P. Vitamin B1 Q. Vitamin B2 R. Pantothenic acid S. Vitamin B12 T. Folic acid Colum...