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Previous Year Questions

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TLS Online TPP Program

QUESTION ID:1

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:2

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

QUESTION ID:3

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

QUESTION ID:4

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:5

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

Column IColumn II
P. Veratrum alkaloids(i) Obesity
Q. Thalidomide(ii) Minamata syndrome
R. Methylmercury(iii) Cyclopia
S. Diethylstilbestrol(iv) Phocomelia

QUESTION ID:6

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

Column I                             Column II                                               
P. Ascaris lumbricoides(i) Subcutaneous tissue in human
Q. Dracunculus medinensis(ii) Lymphatic vessels and lymph nodes
R. Enterobius vermicularis(iii) Small intestine
S. Wuchereria bancrofti(iv) Caecum or vermiform appendix

QUESTION ID:7

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

Column IColumn IIColumn III
P. Microglial cells(i) Lunga. Visual transduction
Q. Leydig cells(ii) Eyesb. Hormone secretion
R. ON cells(iii) Brainc. Phagocytosis
S. Pneumocytes(iv) Testisd. Gaseous exchange

QUESTION ID:8

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

Column IColumn II
P. Dominance hierarchies(iv) Preferential access to the food and mates in a group
Q. Territory(iii) Exclusion of competing individuals using agonistic behavior
R. Altruism(i) Giving up one’s own reproductive potential to benefit another individual
S. Kin selection(ii) Selection acting on related animals which affects fitness of an individual

QUESTION ID:9

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

Column IColumn IIColumn III
P. Epinephrine(i) Hypothalamusa. Pituitary
Q. Prolactin(ii) Thyroidb. Heart
R. Calcitonin(iii) Pituitaryc. Bone
S. Thyrotropin releasing hormone(iv) Chromaffin tissued. Pigeon’s crop

QUESTION ID:10

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:11

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:12

Match the animal inactivity behaviors listed in Column I with representative animals in Column II and their definitions listed in Column III.
 
Column IColumn IIColumn III
P.Torpor(i)Australian burrowing frogsa.Prolonged period of inactivity without reducing body temperature
Q.Hibernation(ii)Polar Bearsb.Inactivity period which accompanies extended periods of dryness
R.Winter sleep(iii)Ground Squirrelsc.Decreased metabolism with lowered body temperature occurring in daily activity cycles
S.Aestivation(iv)Hummingbirdsd.Decreased metabolism and lower body temperature for weeks or months

QUESTION ID:13

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:14

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:15

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:16

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:17

Homogenization of milk leads to disintegration of fat globules by

QUESTION ID:18

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

QUESTION ID:19

Cultures used in industrial production of yogurt are

QUESTION ID:20

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

QUESTION ID:21

The parboiling of paddy results into

QUESTION ID:22

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:23

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:24

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

Column IColumn II
P. Degumming1. Separation of waxes
Q. Neutralization2. Removal of pigments
R. Bleaching3. Removal of phosphatides
S. Winterization4. Removal of free fatty acids

QUESTION ID:25

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

QUESTION ID:26

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

QUESTION ID:27

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

Column IColumn II
P. Hammer mill1. Compression
Q. Burr mill2. Impact
R. Crushing rolls3. Cutting
S. Rotary knife4. Attrition

QUESTION ID:28

Most commonly used refrigerant in direct immersion freezing of food is

QUESTION ID:29

Which among the following are poly unsaturated essential fatty acids?

QUESTION ID:30

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

QUESTION ID:31

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

QUESTION ID:32

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

QUESTION ID:33

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:34

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.