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Previous Year Questions

TLS Online TPP Program

QUESTION ID:1

Which one of the following mutagens convert DNA’s adenine to hypoxanthine?

QUESTION ID:2

Which one of the following leukocytes are present in the largest proportion in healthy human blood?

QUESTION ID:3

The site of photosynthesis in cyanobacteria is ____________.

QUESTION ID:4

The antimicrobial activity of vancomycin is due to the ____________.

QUESTION ID:5

Phenolics act as disinfectant by ____________

QUESTION ID:6

Which of the following methods are used for the identification of microorganisms?

QUESTION ID:7

Which of the following are present in Gram-negative bacteria?

QUESTION ID:8

Nonsense suppressor mutation is found in _________________.

QUESTION ID:9

Choose the correct match for structural components of bacteria to their function.

QUESTION ID:10

Match the pathogen with the appropriate disease.

QUESTION ID:11

Match the correct mode of cell division with respective bacteria.
Bacteria
(P) Streptomyces species
(Q) Rhodopseudomonas acidophila
(R) Bacillus subtilis
(S) Nocardia species

QUESTION ID:12

The correct sequence of overall biochemical reaction which expresses the process of denitrification is ____

QUESTION ID:13

Which of the following diseases are caused by family of DNA viruses?

QUESTION ID:14

Which of the following Gram-positive cocci are found in biofilm of dental plaque?

QUESTION ID:15

Which of the following statements are TRUE for archaea?

QUESTION ID:16

If the plasmid given below is digested with restriction enzymes HindIII and EcoRI, considering complete digestion, how many DNA fragments will be released?

QUESTION ID:17

Escherichia coli growing under favorable conditions doubles in every 20 minutes. If the initial number of Escherichia coli cells is 100, what will be the logarithmic number of cells at 17th generation? (Answer up to 1 decimal place)

QUESTION ID:18

What will be value of the Numerical Aperture (NA), if half aperture angle is 58° and oil immersed objective is used for the process of light microscopy? (Answer up to 1 decimal place) Consider Sin 58° = 0.85 and refractive index of immersion oil used is = 1.50.

QUESTION ID:19

Which one of the following organic compounds is composed of only (i) a nitrogen containing base, (ii) a single five-carbon sugar, and (iii) a triphosphate?

QUESTION ID:20

Which one of the following animals develops adaptive predator avoidance morphology because of the presence of high predator number in its habitat?

QUESTION ID:21

To which class of Drosophila developmental genes does fushi tarazu (ftz) belong?

QUESTION ID:22

The action of which class of enzyme inhibitors can be reversed by adding an excess of substrate?

QUESTION ID:23

Mendel deduced the genetic principle of inheritance by experimenting on sweet pea plants. One of the experiments involved crossing plants with two contrasting characters, tall (dominant) and dwarf (recessive), which yielded all tall plants in the first generation. When the same genetic cross was independently repeated by a researcher, only short plants were obtained. Which one of the following can possibly explain the altered outcome?

QUESTION ID:24

Which of the following is/are responsible for reversible receptor-ligand interaction?

QUESTION ID:25

In the human body, which of the following is/are involved in processing of a foreign antigen?

QUESTION ID:26

Animals can be classified as ‘specialists’ or ‘generalists’ with respect to diet andhabitat selection. Which of the following organism/s belong/s to the specialist category?

QUESTION ID:27

Match the drug/chemicals listed in Column I with the developmental/physiological defects listed in Column II.

QUESTION ID:28

Match the animals listed in Column I with primary tissue or organ of residence in the host listed in Column II

QUESTION ID:29

Match the cell types listed in Column I with their sources in Column II and the primary functional roles listed in Column III.

QUESTION ID:30

Match the ecological concepts listed in Column I with their definitions listed in Column II.

QUESTION ID:31

Match the hormones listed in Column I with their primary source tissues in Column II and the primary target tissues listed in Column III

QUESTION ID:32

2-Deoxyglucose (2-DG) inhibits the proliferation of cells and hence finds use as an anti-cancer agent. It is also used in COVID therapy, where it blocks hyperproliferation of virus-infected cells. Mechanistically, 2-DG blocks glycolysis by inhibiting the activities of which of the following enzyme/s?

QUESTION ID:33

According to Abbe’s equation on microscopy, the ability to resolve two entities inside a cell by light microscopy depends on which of the following factor/s?

QUESTION ID:34

Match the animal inactivity behaviors listed in Column I with representative animals in Column II and their definitions listed in Column III.
 

QUESTION ID:35

If the vital capacity (VC) of an individual is 4900 ml, the tidal volume (TV) is 500 ml, and the inspiratory reserve volume (IRV) is 3300 ml, the expiratory reserve volume (ERV) of the individual is ________ml. (in integer).

QUESTION ID:36

A typical food chain involves producers, herbivores, primary carnivores and secondary carnivores. Based on Lindeman’s law of trophic efficiency, if producers have 40 kJ of energy, the energy that will be stored in secondary carnivores is _____ kJ. (round off to two decimal places)

QUESTION ID:37

The average body length of Drosophila nasuta collected from Andaman and Nicobar Islands is 2 mm. From this population, a few males and females having a body length of 3 mm were selected and interbred. The average body length of the resultant progeny was 2.5 mm. The heritability (h2) of the body length in this population is ______. (round off to one decimal place)

QUESTION ID:38

Which among the given options truly depict the lines 1 and 2 in the figure below with respect to the effect of heat processing on food?

QUESTION ID:39

Homogenization of milk leads to disintegration of fat globules by

QUESTION ID:40

The lowest water activity (aw) supporting the growth of Staphylococcus aureus in food under aerobic condition is

QUESTION ID:41

Cultures used in industrial production of yogurt are

QUESTION ID:42

In a dairy plant, spray drying technology is used to produce whey powder. The rate of spray drying depends on

QUESTION ID:43

The parboiling of paddy results into

QUESTION ID:44

One hundred kg paddy is dried from 18% wet basis to 13% wet basis moisture content. The amount of water removed (in kg) from the paddy is _______ (round off to one decimal place).

QUESTION ID:45

In a canning industry, the total process time (F0) was calculated as 3 min. If each can contains 20 spores having decimal reduction time of 1.6 min, the probability of
spoilage would be ______ in 100 cans (round off to the nearest integer).

QUESTION ID:46

Match the edible oil refining stages given in Column I with their respective functions in Column II

QUESTION ID:47

Make the correct pair of food packaging technology given in Column I with operating principle or description in Column II.

QUESTION ID:48

Which of the following is not a caramel flavour producing compound?

QUESTION ID:49

Match the size reduction equipment in Column I with the method of operation in Column II.

QUESTION ID:50

Most commonly used refrigerant in direct immersion freezing of food is

QUESTION ID:51

Which among the following are poly unsaturated essential fatty acids?

QUESTION ID:52

Which among the following statements are true with respect to protein denaturation?

QUESTION ID:53

Identify the correct pair(s) of milling equipment and the grain for which it is used.

QUESTION ID:54

Which among the following expression(s) is/are correct?

QUESTION ID:55

In a dairy processing plant, milk enters a 30 m long and 2 cm diameter tube at 60 0C and leaves at 57 0C. The total heat loss over the tube length is 381.15 W. The
specific heat capacity, density, and viscosity of milk are 3.85 kJ kg-1 K-1, 1020 kg m-3, and 1.20 cP, respectively. The Reynolds number for the flow is ______ (round off to the nearest integer).
Given: π = 3.14

QUESTION ID:56

The dry bulb temperature and relative humidity of air inside a storage chamber are 37 0C and 50%, respectively. The saturation pressure of water vapour at 37 0C and
barometric pressure are 6.28 kPa and 101.32 kPa, respectively. The humidity ratio of air inside the chamber is ______ kg water (kg dry air)-1 (round off to three decimal places).
Given: Molecular weight of water vapour and dry air are 18.02 g mol-1 and 28.97 g mol-1, respectively.