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Previous Year Questions

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QUESTION ID:1

Which of the following processes are involved in horizontal gene transfer (HGT)?
(i) Conjugation
(ii) Transduction
(iii) Binary fission
(iv) Transformation
(v) Translesion synthesis
(vi) Transversion

QUESTION ID:2

Match the class of antibodies to appropriate description or function

AntibodiesDescription / function
(i) IgA(p) Mucosal immunity
(ii) IgG(q) Immunity to parasitic infections
(iii) IgD(r) Most abundant antibody in the blood
(iv) IgE(s) Found on the B cell membranes

QUESTION ID:3

Match the diseases with the appropriate causative agents

DiseaseCausative agent
(i) Rheumatic heart disease(p) Candida albicans
(ii) Syphilis(q) Group A Streptococcus
(iii) Genital warts(r) Human papilloma virus
(iv) Oral thrush(s) Treponema pallidum

QUESTION ID:4

Consider a spherical bacterial cell with diameter 2 micro m and a eukaryotic cell of spherical shape with a diameter of20 micro m. The surface area to volume (in micro m- 1) ratio of the bacterial cell (round off to 1 decimal place) is times more than that of the eukaryotic cell.

QUESTION ID:5

When grouping bacteria using numerical taxonomy approach, many characteristics are determnined for each strain. If all characteristic are same, then the % similarity is 100. When comparing two bacterial strains, if 72 characteristic are the same and 44 characteristic are different, the% sirnilru1ty (round off to 2 decimal places) between the two strains is __ .

QUESTION ID:6

Which one of the following animals possesses two chambered heart?

QUESTION ID:7

In eukaryotic chromatin organization, which one of the histones seals off the nucleosome at the location at which linker DNA enters and leaves the nucleosome?

QUESTION ID:8

Which one of the following parasites does NOT cause lymphatic filariasis?

QUESTION ID:9

A species adapted to a specific habitat is called

QUESTION ID:10

The phylum that is characterized by the animals having a "water vascular system'' is

QUESTION ID:11

The finches on the Galapagos Islands have widely differing beaks adapted according to their diets. This is an example of

QUESTION ID:12

Which one of the following animals is named as a "living fossil", where the animal is persisting above 400 million years without further major morphological evolution?

QUESTION ID:13

Consider the given peptide, Ala-Glu-Val-Asn-Ile-Asp-Pro-Asp-Gln-Gly-Asp. The net charge on the peptide at pH 1. 0 will be __

QUESTION ID:14

The total number of complementary determining regions (CDRs) in the functional form of an IgM antibody is __

QUESTION ID:15

In a 1500 base pair double stranded B-DNA, 70% of purines are adenine bases. The total number of hydrogen bonds (Watson- Crick base pairing) in the DNA will be __

QUESTION ID:16

Match the given vitamins in Column I with the related proteins in Column II

Column IColumn II
a) Vitamin C1) Thrombin
b) Vitamin K2) Rhodopsin
c) Vitamin A3) Pyruvate dehydrogenase
d) Vitamin B14) Prolyl hydroxylase

QUESTION ID:17

Match the following terms in Column I with the appropriate explanation in Column II

Column IColumn II
a) Spliceosome1) Cell scavengers
b) Peroxisome2) Metabolism of long chain fatty acids
c) Lysosome3) Microtubules
d) Centrosome4) Post transcriptional modifications

QUESTION ID:18

Match the respective behaviour given in Column I with the appropriate explanation in Column II

Column I                          Column II                                                                                                           
a) Agonistic behaviour1) Individual behaviour where fitness of other increases at the expense of self
b) Hierarchical behaviour2) Individuals contribute towards enhancement of mutual fitness
c) Altruistic behaviour3) Aggressive behaviour of individuals within a population
d) Cooperative behaviour4) Existence of different levels of dominance within a population

QUESTION ID:19

Closure of neural tube during neurulation is the process in which neural tube eventually forms a closed cylinder that separates from surface ectoderm. Which one of the following terms is linked to the failure in the closure of entire neural tube i.e. brain and spinal cord, over the body axis?

QUESTION ID:20

Which one of the following factors does NOT contribute to "allopatric speciation"?

QUESTION ID:21

Match the hormones in Column I to their respective physiological effects in Column II

Column I (Hormones)Column II (Physiological Effects)
a) Melatonin1) Inhibition of secretion of growth hormone
b) Oxytocin2) Synthesis of milk in mammary gland
c) Cholecystokinin3) Secretion of milk and uterine contraction
d) Prolactin4) Secretion of enzymes from pancreatic acinar cells
e) Somatostatin5) Regulation of circadian rhythms

QUESTION ID:22

The molecular weight of a double stranded DNA fragment present in mitochondria is 7.92 x 108 g mol-1. A pair of nucleotide contributes 0.34 nm to the length of DNA and the average molecular weight of a nucleotide is 330 g mol-1. The number of protein molecules, consisting of 200 amino acids each, coded by this mitochondrial DNA is __

QUESTION ID:23

An enzyme that follows Michaelis-Menten kinetics catalyzes the conversion of 35 micro M substrate into product with a reaction velocity of 10  micro M s-1 . The Km and kcat for the substrate are 14  micro M and 500 s-1 respectively. The total amount of enzyme taken for the enzyme reaction is __ nM.

QUESTION ID:24

A distinctly large population of randomly mating laboratory mice contains 36% albino mice, which is caused by a double recessive genotype (aa). The black coloured mice in the population is due to dominant genotype (AA/ Aa). Considering the fact that this population is in Hardy-Weinberg equilibrium, the frequency of heterozygous alleles (Aa) in this population is __ (round off to 2 decimal places).

QUESTION ID:25

genetic cross was made between homozygous wild-type males (a+a+b+b+c+c+) and triple - mutant females (aabbcc) of Drosophila melanogaster. Then the F1 males (a+ab+bc+c) were back crossed to the triple-mutant females which resulted in the following F2 progenies: The order of genes as determined from the above data was found to be "b a c" (note that the order is equivalent to "cab" and the order of outside makers are arbitrary). The map distance between "band c" is __ centiMorgan (round off to 1 decimal place).

QUESTION ID:26

Colloidal stability of milk casein is because of the highly hydrated carbohydrate residues in

QUESTION ID:27

Rice bran is stabilized prior to oil extraction to protect it from the activity of ____ _

QUESTION ID:28

Sticking of powder to wall of the chamber during spray drying off fruit juice is due to __ .

QUESTION ID:29

The arubigins and theaflavins in black tea are formed by the oxidation and dimerization of

QUESTION ID:30

Ratio of Schmidt number to Lewis number is ____ _

QUESTION ID:31

'Red dog' is one of the byproducts during milling of _ _

QUESTION ID:32

a) Assertion: Ash content is one of the quality indicators of the flour to be used for bread making.
r) Reason: Higher ash content indicates better quality of the bread flour.
Choose the correct answer from the following:

QUESTION ID:33

An ice cream mix of 870 g L-1 has been used to prepare ice cream which yielded a finished product of 490 g L-1. The per cent over nm is (round off to I decimal place).

QUESTION ID:34

Impeller in a fruit juice mixing tank is rotating at 200 rpm with a Reynolds number > 104. Density of juice is 1045 kg m-3. If diameter of the impeller is doubled and other conditions remained constant, the power requirement of mixing will increase by a factor of __ _

QUESTION ID:35

Paddy consisting of 20% husk has been milled to remove 6% bran during polishing. Assuming no other losses, yield (per cent) of polished rice from the paddy is (round
off to I decimal place).

QUESTION ID:36

Match the following laws in Column I with corresponding phenomenon in Column II.

Column IColumn II
P. Newton's law1. Size reduction
Q. Hertz constant stress theory2. Substance cooling
R. Fick's law3. Damage of fruits and vegetables
S. Bond's law4. Molecular diffusion

QUESTION ID:37

Match the mold in Column I with its asexual/sexual spore shown in Column II.

Column IColumn II
P. Aspergillus1. Arthrospore
Q. Geotrichum2. Oospores
R. Rhizopus3. Conidia
S. Oomycetes4. Sporangiospores

QUESTION ID:38

Match the foods given in Column I with their specific usage given in Column II.

Column IColumn II
P. Egg yolk1. Ice cream
Q. Pregelatinised starch2. Mayonnaise
R. Gum3. Baking powder
S. Starch4. Baby food

QUESTION ID:39

Match the bioactive compounds in Column I with their botanical source given in Column II.

Column IColumn II
P. Isoflavones1. Corn
Q. Resistant starch2. Grapes
R. Xanthophyll3. Soybean
S. Resveratrol4. Plantain (culinary banana)

QUESTION ID:40

Match the following microbial species in Column I with related disease caused by them as shown in Column II.

Column IColumn II
P. Vibrio sp.1. Gastroenteritis
Q. Shigella sp.2. Typhoid
R. E. coli3. Cholera
S. Salmonella typhi4. Bacillary dysentery

QUESTION ID:41

Buffalo milk having density of 1030 kg m-3 is homogenized with a pressure of 30 MPa. Given, acceleration due to gravity as 9.81 m s-2 and assuming no pressure loss, the velocity (m s-1) of the milk flowing through the homogenizer valve will be (round off to 2 decimal places).

QUESTION ID:42

Potato slices have been dehydrated from an initial solid content of 12% to a final solid content of 94%. If the peeling and other losses are to the time of 10%, final yield (per cent) of the dried chips per ton of fresh potato taken is (round off to 2 decimal places).

QUESTION ID:43

A mixed fruit beverage with 12 °Brix having specifc heat of 4298 J kg-1 K 1 is being heated from 30octo 95 oc for pasteurization at a flow rate of 1000 L h-1 in a tubular heat exchanger. Steam at 100 oc is used as heating medium which is converted into condensate at 100 oc. If the density of beverage is 1075 kg m-3 and the latent heat of steam at the given temperature is 2257 kJ kg-1, the mass flow rate of steam (kg min-1) is (round off to 2 decimal places).

QUESTION ID:44

Room air is at 40 oc with 60% relative humidity. Saturated vapour pressure of water at 40 oc is 7.375 kPa. Humid volume of air (m3 per kg of dry air) is (round off to 3 decimal places).

QUESTION ID:45

Freezing of 100 mm spherical meat ball with 60% moisture at 35 oc is being done in an air blast freezer maintained at -45 oc. Given, latent heat of fusion for water is 333.2 kJ kg-1, the1mal conductivity of meat is 1.5 W m-1 oc-1, convective heat transfer coefficient is 40 W m-2 oc-1, density of frozen meat is 980 kg m-3 and initial freezing temperature of meat ball is -10 oc. Using Plank's equation, Freezing Time (h) is (round off to 2 decimal places).