Menu

Previous Year Questions

TLS Online TPP Program

QUESTION ID:1

Gauri said that she can play the keyboard her sister.

QUESTION ID:2

A transparent square sheet shown above is folded along the dotted line. The folded sheet will look like .

QUESTION ID:3

If θ is the angle, in degrees, between the longest diagonal of the cube and any one of the edges of the cube, then, cos θ =

QUESTION ID:4

If  , then the value of x is:

QUESTION ID:5

Pen : Write :: Knife :
Which one of the following options maintains a similar logical relation in the above?

QUESTION ID:6

Listening to music during exercise improves exercise performance and reduces discomfort. Scientists researched whether listening to music while studying can help students learn better and the results were inconclusive. Students who needed external stimulation for studying fared worse while students who did not need any external stimulation benefited from music.
Which one of the following statements is the CORRECT inference of the above passage?

QUESTION ID:7

A jigsaw puzzle has 2 pieces. One of the pieces is shown above. Which one of the given options for the missing piece when assembled will form a rectangle? The piece can be moved, rotated or flipped to assemble with the above piece.

QUESTION ID:8

The number of students in three classes is in the ratio 3:13:6. If 18 students are added to each class, the ratio changes to 15:35:21. The total number of students in all the three classes in the beginning was:

QUESTION ID:9

The number of units of a product sold in three different years and the respective net profits are presented in the figure above. The cost/unit in Year 3 was ' 1, which was half the cost/unit in Year 2. The cost/unit in Year 3 was one-third of the cost/unit in Year 1. Taxes were paid on the selling price at 10%, 13% and 15% respectively for the three years. Net profit is calculated as the difference between the selling price and the sum of cost and taxes paid in that year.
The ratio of the selling price in Year 2 to the selling price in Year 3 is

QUESTION ID:10

Six students P, Q, R, S, T and U, with distinct heights, compare their
heights and make the following observations.
Observation 1: S is taller than R.
Observation IT: Q is the shortest of all.
Observation ill: U is taller than only one student.
Observation IV: Tis taller than S but is not the tallest.
The number of students that are taller than R is the same as the number of students shorter than .

QUESTION ID:11

The geometry of Fe(CO)5 is (Given: Atomic number of Fe = 26)

QUESTION ID:12

The structure of the major product Q of the following reaction is


QUESTION ID:13

The time taken by a first order reaction to reach 90% completion is 20 s. The time taken for the reaction to reach 50% completion is s (rounded off to the closest integer).

QUESTION ID:14

The ground state energy of an electron in a hydrogen atom is -13.60 e V. The energy of the electron in the third excited state is e V (rounded off to two decimal places).

QUESTION ID:15

A solution of a compound shows an absorbance of 0.42 at 275 nm in a cuvette with 0.1 dm light path. The molar absorptivity of the compound is The concentration of the compound is x10-5 M (rounded off to the closest integer).

QUESTION ID:16

The CORRECT order of acidity of the following compounds is

QUESTION ID:17

The 0-0 bond order in 022- species is

QUESTION ID:18

For a reaction, X -  Products
Group I contains three plots of reactant concentrations as functions of time, where x = concentration of reactant X at time t; xo = concentration of reactant X at initial time, t = 0. Group II gives a list of different orders of reaction. Match the plots with the order of the reaction.

QUESTION ID:19

The structure of the major products of the following reaction is


QUESTION ID:20

The CORRECT combination(s) of Y and T for the following elimination reaction is( are)

QUESTION ID:21

Among the following, the diamagnetic species is(are) (Given: Atomic numbers of Fe= 26, Co = 27, and Ni = 28)

QUESTION ID:22

Given the following standard heats of formation, = 314. 6 kJ mol-1  5.4 kJ mol-1, and = 218. o kJ mol-1, the average bond enthalpy of a P-H bond in PH3(g) is kJ mol-1 (rounded off to one decimal place).

QUESTION ID:23

The total number of possible geometrical isomer(s) for [PtBrCI(NH3)(py)]0 is ---·
(Given: py =Pyridine and atomic number of Pt = 78)

QUESTION ID:24

Given the standard reduction potentials, Emg+ /Mg = -2.37 V and EAg+ /Ag = 0. 80 V, the potential of the following cell
at 25 oc is _____ V (rounded off to two decimal places). (Given: Faraday constant= 96500 C mol-1, Gas constant R = 8.314 J K-1mol-1)

QUESTION ID:25

The freezing point of 80 g of acetic acid (freezing point constant 3.9 K kg mol-1) was lowered by 7.8 K due to the addition of 20 g of a compound. The molar mass of the compound is g mol-1 (rounded off to closest integer).

QUESTION ID:26

Which one of the following molecules (-1mg/mL) do NOT absorb at 280 nm in an aqueous solution of pH 7.00 at room temperature?

QUESTION ID:27

A molecule that forms a donor-acceptor energy transfer pair with the dansyl group is

QUESTION ID:28

The stationary phase used in gel filtration chromatography is composed of --

QUESTION ID:29

According to the "wobble hypothesis" inosine at the third position of the anticodon cannot form hydrogen bonds with

QUESTION ID:30

pKa value of the guanidinium group of Arginine is __

QUESTION ID:31

The non-coenzyme vitamin is

QUESTION ID:32

Telomerase has a function similar to

QUESTION ID:33

Which one of the following enzymes is used in Polymerase Chain Reaction ?

QUESTION ID:34

In hepatocytes, the detoxification of drugs occurs in

QUESTION ID:35

Which one of the following antibiotics can form an ion channel in the bacterial membrane?

QUESTION ID:36

Which one of the following cells lack hypoxanthine-guanine phosphoribosyl transferase (HGPR1)?

QUESTION ID:37

Which of the following lipids is non-ionic?

QUESTION ID:38

Anti-B antibodies are present in the serum of

QUESTION ID:39

Which of the following are energy requiring processes?

QUESTION ID:40

Which of the following are correctly paired?

QUESTION ID:41

The high energy compound(s) is/are:

QUESTION ID:42

Given below are four plots obtained from separate experiments on enzyme inhibition kinetics. The velocity (v) of the reaction is plotted at varying concentrations of substrate (s) and inhibitor (I). The plot(s) corresponding to competitive inhibition is/are

QUESTION ID:43

With respect to sodium dodecyl sulphate - polyacrylamide gel electrophoresis (SDS-PAGE), which of these statement(s) is/are true?

QUESTION ID:44

In the plot given below, the solid line represents oxygen binding to hemoglobin under physiological conditions. The broken line represents the condition(s) of

QUESTION ID:45

Considering the open chain forms, which of the following pair(s) represent/san epimer?

QUESTION ID:46

Wheat plants treated with prolonged cold temperature at the seedling stage flower earlier than the untreated control Seeds collected from these treated
individuals, however, give rise to plants that do not flower early. This phenomenon is called

QUESTION ID:47

Which ONE of the following plant taxa contains vascular tissue (xylem and phloem) but not woody tissue?

QUESTION ID:48

Which ONE of the following statements regarding spores and gametes is CORRECT?

QUESTION ID:49

Which ONE of the following organelles controls gravitropism in the roots of higher plants?

QUESTION ID:50

Phytoalexins play important role in plant defense against pathogens. Choose the INCORRECT option related to phytoalexins.

QUESTION ID:51

The figure shows the germination percentage of imbibed seeds treated with the given sequence of red (R) and far-red (F) light (each exposure lasting 5 min). The percentage of germination was scored after 72 hours in darkness at 25 °C. Based on this, which ONE of the following options is CORRECT?

QUESTION ID:52

The structures of four plant hormones are shown. Identify the CORRECT hormone that is responsible for bending of coleoptile of canary grass in response to unidirectional white light.

QUESTION ID:53

Which of the following cellular component(s) is/are NOT part(s) of cytoskeleton in Angiosperms?

QUESTION ID:54

Which of the following enzyme(s), when overexpressed, would result in rice grains with increased P-carotene content?

QUESTION ID:55

In spiral phyllotaxis, leaves are initiated sequentially on the meristem with two successive primordia being separated by golden angle. If a plant follows right-handed spiral phyllotaxis when looked down the meristem, then the angle between two successive leaves would be degrees (with correct sign, round off to one decimal place).

QUESTION ID:56

Match the cell/tissue types in GROUP I with their corresponding total DNA content in GROUP II of a typical diploid Angiosperm species and choose the CORRECT option (C denotes DNA content in haploid genome).

QUESTION ID:57

Match the modified organs in GROUP I with their corresponding prototypic forms in GROUP II and choose the CORRECT option.

QUESTION ID:58

The diagram describes the ABC model of flower patterning in Arabidopsis where the A , B and C functions are operational in the whorls (1 +2), (2+ 3) and (3+4), respectively, in the wild-type flower. Removal of A or C function results in the floral organ arrangements as (carpel; stamen; stamen; carpel) or (sepal; petal; petal; sepal), respectively. Based on these observations, which ONE of the following molecular pathways is CORRECT for floral organ pattern generation? Arrow indicates activation and bar indicates inhibition

QUESTION ID:59

Find the CORRECT match among the plant species in GROUP I, the predominant phytochemical in GROUP II and the economic/medical use in GROUP Ill.

QUESTION ID:60

Match the genetically modified crop in GROUP I with the corresponding genetic element in GROUP II.

QUESTION ID:61

To understand the mechanism of systemic acquired resistance (SAR), a team of researchers isolated a mutant with reduced SAR response. Sequencing of this mutant revealed homozygous mutations in two genes, X and Y. Which of the following experiment(s) would test whether the mutant phenotype is caused by mutation in either or both the genes?

QUESTION ID:62

The observations of an experiment on seed germination in various genotypes under different light conditions are given, where .Y and X indicate germination and the lack of it, respectively.
Based on these observations, which of the following option(s) is/are CORRECT?

QUESTION ID:63

Which of the following option(s) is/are CORRECT in the context of hybrid plant generation using Barnase/Barstar-based male sterile lines?

QUESTION ID:64

In a diploid plant species, the T allele produces tall individuals and is completely dominant over the t allele that produces short individuals. Similarly, the W allele produces round seeds and is completely dominant over thew allele that produces wrinkled seeds (assume T and W loci not linked). If a parent with TTWW genotype is crossed to another parent with ttww genotype, the fraction of the F2 population produced by the fusion of both recombinant gametes would be . (Round-off to two decimal places.)

QUESTION ID:65

In a population of a diploid plant species obeying Hardy-Weinberg equilibrium, a locus regulating flower color has two alleles R and r. Individuals with RR, Rr and rr genotypes produce red, pink and white flowers, respectively. If the ratio of red, pink and white flower-producing individuals in the population is 6:3:1, then the frequency of r allele in the population would be %. (Round-off to two decimal places.)

QUESTION ID:66

Antonie van Leeuwenhoek observed several microscopic organisms under his hand-made microscope. He described them as

QUESTION ID:67

Which ONE of the following pathways oxidizes 1 mole of glucose to 2 moles of pyruvic acid along with one mole each of ATP, NADH and NADPH, in
Pseudomonas spp., but not in Bacillus spp.?

QUESTION ID:68

Water balance in extreme halophiles such as Halobacterium is maintained by cell surface glycoproteins consisting of

QUESTION ID:69

Nocardia spp. are not amenable to the classical method of Gram staining due to the presence of

QUESTION ID:70

Protists belonging to the genus Trichonympha thrive in the gut of termites. They help the termites use wood as a food source. This relationship is an example of

QUESTION ID:71

Which of the following is/are used as electron donor/s for C02 reduction during photosynthesis in purple sulfur bacteria?

QUESTION ID:72

Which of the following catalyze(s) substrate-level phosphorylation?

QUESTION ID:73

Which of the following method(s) can be applied to identify a bacterial species?

QUESTION ID:74

Which of the following event(s) would contribute to the induction of lac operon in a wild-type strain of E. coli?

QUESTION ID:75

One mole of a circular bacterial plasmid was digested with a high-fidelity restriction enzyme. The plasmid has five restriction sites for the enzyme used. The number of moles of fragments released upon cleavage at all sites is ---

QUESTION ID:76

Under anaerobic fermentative growth conditions, one mole of glucose yields 22 grams of Streptococcus faecalis or 8.6 grams of Zymomonas mobilis. The molar growth yield (Y ATP) for (i) S. f aecalis and (ii) Z. mobilis will be

QUESTION ID:77

The order of abundance of quinones (ubiquinone [UQ], menaquinone [MQ] and demethylmenaquinone [DMQ]) in E. coli growing anaerobically on fumarate is

QUESTION ID:78

What is the number of ATPs generated per molecule of NADH during oxidative phosphorylation in E. coli via (i) NDH-1 and cytochrome bo complex or (ii) the NDH-2 and cytochrome bd complex? (Assume H+/ATP = 3)

QUESTION ID:79

Match the Immunoglobulin classes with their function

QUESTION ID:80

The figure shows the profiles of quantitative real-time PCR (qRT-PCR) tests for SARS-Co V -2 conducted on the throat swab samples of three individuals (X, Y and Z). Tests were carried out under identical conditions. Dotted line represents the threshold fluorescent value. Identify the correct statement on the status of the COVID-19 tests of the individuals based on their qRT -PCR profiles.

QUESTION ID:81

The rate of appearance of recombinant E. coli strains containing different genes after a mating between Hfr and Ir strains is shown in the graph (left). The approximate location of different genes (p, q, r, s, t, x, andy) along the Hfr chromosome is also shown (right). Based on this information, identify the recombinants X, Y and Z.


QUESTION ID:82

The genome of a bacterium encodes for 10 different surface antigens, whose expression can be turned 'ON' or 'OFF' randomly and independently. The number of possible antigenic combinations is ___ 

QUESTION ID:83

Suppose the mRNAs in a newly discovered bacteria are composed of only two distinct nucleotides (as opposed to four found in all known organisms). Considering that the organism has no nucleotide modification systems, the number of nucleotides required per codon to encode at least 20 distinct amino acids will be

QUESTION ID:84

The decimal reduction time (D) for reducing 1012 spores of Clostridium botulinum to 1 spore at 111°C will be min (in integer). The D value is 0.2 min at 121 °C. The increase in temperature required to change D to 1/1 0th of its initial value (Z value) is 1 0°C.

QUESTION ID:85

The generation time of E. coli is 30 minutes. For an exponentially growing culture, the initial number of bacteria required to reach a number of 109 in 2 hours is x107 (round off to two decimal places).

QUESTION ID:86

Ichthyophis belongs to which of the following Class?

QUESTION ID:87

The two homologous genes occurring in different species are called

QUESTION ID:88

The expression of holandric genes causes which of the following genetic trait in humans?

QUESTION ID:89

Assume that the anticodon for an unknown amino acid is 3' AUG 5'. The corresponding code on DNA sequence would be

QUESTION ID:90

The Organ of Corti is found in which of the following parts of human body?

QUESTION ID:91

In adult athletes, muscles grow larger when exercised and are capable of regeneration after injury. This is due to proliferation and differentiation of

QUESTION ID:92

The term innate behavior is a sort of animal behavior that is

QUESTION ID:93

A man, whose mother and father had blood groups A and 0 respectively, marries a woman with blood group AB. If the man has blood group A, then the number of different blood groups possible among their children will be (in integer).

QUESTION ID:94

A population of snakes in an isolated island is in Hardy-Weinberg equilibrium for a gene with only two alleles (A and a). If the allelic frequency of A is 0.6, then the genetic frequency of Aa is (round off to 2 decimal places).

QUESTION ID:95

In the structure of a polypeptide, one a.-helix (3.613 helix) contains 32 intrachain hydrogen bonds. The number of turns in the helix will be ___ _ (in integer).

QUESTION ID:96

Match the terms in Column I with the specific descriptions in Column II


QUESTION ID:97

Match the autoimmune diseases in Column I for the self-antigens in Column II

QUESTION ID:98

Match the types of cell movements during gastrulation in Column I with the descriptions in Column II

QUESTION ID:99

Match the therapeutic factors in Column I with the applications in Column II

QUESTION ID:100

Match the cell organelles in Column I with the appropriate functions in Column II

QUESTION ID:101

Cohesin and Condensin proteins of eukaryotes belong to which one of the following groups?

QUESTION ID:102

Which of the following options represent the animals as Endemic to India?

QUESTION ID:103

Which of the following amino acids contain more than one chiral center?

QUESTION ID:104

An enzyme catalyzes the conversion of 30 micro M of a substrate to product at reaction velocity of 9.0microM s-1 When [Et] = 30 nM and Km = 10 micro M, Kcat/Km
of enzyme will ben x 107 M-1 s-1 The value of n is (in integer).

QUESTION ID:105

A cross is made between two animals of genotypes AaBb x AaBb, where loci A and loci B assort independently. The progeny of this dihybrid cross was then allowed to self-cross. The proportion of the progeny that showed segregation for loci A (i.e., produce A- and aa progeny) in % will be ____ (in integer).

QUESTION ID:106

In a typical bacterial growth curve, the first order kinetics for growth rate is observed in

QUESTION ID:107

Which of the following microorganisms is NOT a causative agent for food borne diseases?

QUESTION ID:108

Which one of the followings is NOT a fermented food product?

QUESTION ID:109

The Protein Efficiency Ratio (PER) is defined as

QUESTION ID:110

Which one of the following enzymes sequentially releases maltose from starch?

QUESTION ID:111

Highest mole % of amino acid mixture present in glutenin of wheat gluten are

QUESTION ID:112

Which one of the following compounds is present in soybean and acts as phytoesterogen?

QUESTION ID:113

Which one of the followings is an oligosaccharide?

QUESTION ID:114

Bittering agent in grape fruit formed after juice extraction under acidic conditions is

QUESTION ID:115

Difference between adsorption and desorption isotherms is known as

QUESTION ID:116

The conversion of pyruvate to lactic acid in homolactic fermentation is catalyzed by

QUESTION ID:117

Which one of the following statements is INCORRECT with respect to Controlled Atmosphere Package (CAP) and Modified Atmosphere Package (MAP) of agro- produce?

QUESTION ID:118

Match unit operation in Column I with its application in food processing in Column II.

QUESTION ID:119

Which of the followings are correct pair of GRAS chemical food preservative, affected organism and given food matrix?

QUESTION ID:120

Choose the correct pair of pigment and their corresponding color in plant products

QUESTION ID:121

Which of the following compounds act as anti-nutritional factors?

QUESTION ID:122

Which of the followings is/are commonly used medium/media in the supercritical fluid extraction of spices and tea?

QUESTION ID:123

Which of the following expressions represent the Reynolds number of a fluid flowing through a uniform circular cross section pipe?

QUESTION ID:124

Which of the following combinations of analytical equipment, property measured and food property are correct?

QUESTION ID:125

Dry air is fed into a tray dryer. The percentage relative humidity of the air leaving the dryer is 60% at 70°C and 101.35 kPa. If, saturated vapour pressure of water at 70°C is 31.2 kPa, the humidity of the air leaving the dryer in kg water per kg dry air (round off to 3 decimal places) will be __ _ (Given : Molecular weight of water and air are 18.02 g mol-1 and 28.97 g mol-1 respectively)