Previous Year Questions

QUESTION ID:2

Colchicine is a chemical which

QUESTION ID:3

Identify the event which is not associated with Na⁺ current impairment

QUESTION ID:4

Cortisol released from adrenal cortex in response to stress leads to

QUESTION ID:5

How many neurons are likely to be there in your brain?

QUESTION ID:6

A single nucleotide polymorphism (SNP) is an example of

QUESTION ID:7

Which of the following assumptions does not belong to the Hardy–Weinberg principle?

QUESTION ID:8

The type of male sterility where pollen development is normal but pollen function is impaired, is termed as

QUESTION ID:9

In which minor phyla of invertebrates the anus is located inside the lophophore?

QUESTION ID:10

Under stressful condition, the administration of nonsteroidal anti-inflammatory agent, such as aspirin may cause significant reductions in

QUESTION ID:11

Which of the following is not a G-protein coupled receptor?

QUESTION ID:12

The basic factors that stimulate gastric secretion are

QUESTION ID:13

Which of the following cellular enzymes is related to relaxation of vascular smooth muscle?

QUESTION ID:14

Which one of the following physiological functions is most likely to be impaired due to presence of mutated occludin and claudin proteins?

QUESTION ID:15

The ‘mid-blastula transition’ is the point in development when

QUESTION ID:16

In Drosophila, bicoid (bcd) gene…

QUESTION ID:17

Which one of the following redox centers within the respiratory chain does not possess a prosthetic group?

QUESTION ID:18

Why do Burchell’s Zebras migrate 150 miles every year away from Botswana’s water-filled Okavango Delta to the Makgadikgadi Salt Pan?

QUESTION ID:19

Plasmodium spp. overcome the hosts’ physical and physiological barriers by synthesizing the protein named as

QUESTION ID:20

A 24-year-old foreign male Ph.D. student of your university was detected with blood in his urine after 4 weeks of his arrival from Africa. Microscopic examination of his urine revealed the presence of eggs with terminal spines. In course of investigation, he admitted that he had been working in the rice field of his family occasionally since his teenage. The most likely etiologic agent of his complaint was

QUESTION ID:21

Rocky mountain spotted fever is transmitted by the

QUESTION ID:22

The ABO blood types of 1000 people from an isolated city were determined and the following data are obtained:

What would be the frequency of i-allele of ABO blood group gene of these data?

QUESTION ID:23

The inheritance of a trait due to difference in DNA methylation pattern may be referred to as

QUESTION ID:24

Oligoglycosylceramides present ubiquitously in plasma membrane that play a very important role in signal transduction, cell-cell interaction and modulation of cell proliferation, is a class of

QUESTION ID:25

In a food web consisting of 10 species, the observed number of links is 20. The connectance value for this food web is

QUESTION ID:26

A keystone species is

QUESTION ID:27

Which one of the following is not the characteristic of Mangrove vegetation?

QUESTION ID:28

‘Race ways’ are typically used for the culture of

QUESTION ID:29

Several techniques are employed for aquaculture of the Indian Major Carps. Which one of the following techniques is not recommended for this purpose?

QUESTION ID:30

Which one of the following statements is not true?

QUESTION ID:31

Anaerobic ammonium oxidation (Anammox) is an important microbial process involved in the nitrogen cycle. Select the correct option from among the following combinations.

(P) The Anammox bacteria oxidize ammonium with nitrite under anaerobic condition
(Q) The Anammox process is currently used for the removal of ammonium in waste water system
(R) The Anammox bacteria belong to genera Brocadia, Kuenenia, Scalindua, Anammoxoglobus and Jettenia
(S) The Anammox bacteria are characterized by the possession of extracellular anammoxosome in which the anammox process takes place

QUESTION ID:32

In some organisms, the potent allosteric activator of phosphofructokinase-1, one of the key regulatory enzymes of glycolytic pathway is

QUESTION ID:33

An increase in entropy occurs in which one of the following situations?

QUESTION ID:34

Which of the following groups of microorganisms produce the neurotoxin β-N-methylamino-L-alanine (BMAA), a natural non-proteinogenic diamino acid that is produced in marine, freshwater and terrestrial environment?

QUESTION ID:35

Biosynthesis of which of the following pairs of antibiotics is achieved through the use of nonribosomal protein synthases (NRPSs)?

QUESTION ID:36

The leader peptide of trp operon contains two contiguous tryptophan residues. In absence of tryptophan ribosome, stalling occurs allowing the leader regions 2 and 3 to pair. At what position of a 14 amino acids leader peptide two contiguous tryptophan codons are located?

QUESTION ID:37

siRNA

QUESTION ID:38

A phenomenon where a single gene has more than one phenotypic effect is known as

QUESTION ID:39

A decrease in Bcl-2 / Bax ratio will impact a cell by

QUESTION ID:40

One of the underlying reasons for development of the tertiary lymphoid organs (TLOs) as lymphoid neoorganogenesis in case of cancer is

QUESTION ID:41

When a lambda DNA enters a new host, how is lysogeny established in absence of CI repressor?

QUESTION ID:42

λZAP vector is an example of

QUESTION ID:43

Viral-based transfection involves using a viral vector to carry a specific nucleic acid sequence into a host cell. Which of the following viruses are often used for stable transfection of cells?

QUESTION ID:44

Three restriction endonucleases, P, Q and R, are capable of recognising 4bp, 6bp and 8bp sequences, respectively. What would be the relative frequency of occurrence of these sequences on a bacterial genome?

QUESTION ID:45

Minisatellites or Variable Number Tandem Repeats (VNTRs) are used in

QUESTION ID:46

Choose the right combination of components required to set up a PCR from the following

QUESTION ID:47

In protoplast culture experiment, the early detection of primary cell wall formation can be achieved by using

QUESTION ID:48

Which of the following embryo sacs comprises of an egg apparatus of three haploid cells, three diploid antipodal cells and a central cell with two polar nuclei of which one is haploid and the other is triploid?

QUESTION ID:49

In cryopreservation experiment, cryoprotectant chemicals act by

QUESTION ID:50

Image formation in a Scanning Electron Microscope (SEM) requires signal of

QUESTION ID:51

Light inducible seed germination, termed photoblastism, occurs in some higher plants. Which one of the following is the example of positive photoblastic seed that does not germinate in darkness but requires exposure to sunlight?

QUESTION ID:52

Density gradient centrifugation of genomic DNA of a specific organism revealed a lower density peak in addition to the main peak. This is due to

QUESTION ID:53

Median of first ‘100’ natural number is

QUESTION ID:54

If the slope of the regression line is 1·75 and the intercept is 12, then the value of Y, when X is 3, would be

QUESTION ID:55

In C₄ plants, refixation of CO₂ occurs in chloroplasts of

QUESTION ID:56

Quiescent centres of root apices serve as

QUESTION ID:57

Which of the following statements is incorrect?

QUESTION ID:58

During secondary wood formation in plants, balloon-like protrusions called ‘Tyloses’ are generated from

QUESTION ID:59

In which of the following chromosomes lateral loops of DNA are present?

QUESTION ID:60

‘Incertae sedis’ is the term used for a taxonomic group where

QUESTION ID:61

Identify the wrong statement about the Bulliform cells or motor cells

QUESTION ID:62

Which of the following statements is incorrect?

QUESTION ID:63

Which one of the following compounds specifically cleaves peptide bonds after methionine residue?

QUESTION ID:64

Which of the following statements is not correct for chrysolaminarin?

QUESTION ID:65

The chemical nature of ‘reserpine’, obtained from the plant Rauwolfia serpentina, is

QUESTION ID:66

A molecular probe used in nucleic acid hybridization process is generally

QUESTION ID:67

Which of the following statements is not correct for heterocysts?

QUESTION ID:68

Gel-filtration chromatography is a versatile method for efficient separation of biological molecules. Which of the following statements is not true for this chromatographic method?

QUESTION ID:69

Waste water treatment is a multistep operation employing a number of independent processes. Which of the following stages of waste water treatment is carried out by aerobic microorganisms?

QUESTION ID:70

Which of the following methods is used for protein detection using antibody-based probes to obtain specific information about target proteins from complex samples?

QUESTION ID:71

Which one of the following neurons in CNS has a GABA$_A$ receptor containing the alpha 6 subunits?

QUESTION ID:72

In signal transduction, the Rhizobium establishes its contact with leguminous plant through

QUESTION ID:73

The first transgenic cow developed in 1997 was Rosie. Which of the following genes was introduced in Rosie?

QUESTION ID:74

Histone acetylation increases the transcription of gene because

QUESTION ID:75

The Mycoplasma spp. are characterized by all of the following general features except

QUESTION ID:76

Which of the following enzymes is not found in lysosomes?

QUESTION ID:77

The synthesis of monounsaturated fatty acid palmitoleate, 16:1 (Δ⁹) from palmitic acid is catalysed by fatty acyl-CoA desaturase in an oxidative reaction, the enzyme is a

QUESTION ID:78

The two extracellular domains, present in each chain of T-cell receptor (TCR) heterodimer belonging to immunoglobulin superfamily (IgSF) domain, are constituted of

QUESTION ID:79

Which one of the following organic groups has least probability of hydrogen bond formation with water?

QUESTION ID:80

In symbiotic relationship with plants, which of the following is formed by Ectomycorrhizal fungi?

QUESTION ID:81

In a stirred tank bioreactor, the primary function of the impeller is to

QUESTION ID:82

In April 2016, the National Green Tribunal suspended the environmental clearance given to the proposed hydropower project in Arunachal Pradesh to save which of the following animal species?

QUESTION ID:83

Bacterial ribosomes are composed of two asymmetric subunits, the large 50S subunit of Escherichia coli ribosome consists of

QUESTION ID:84

Loktak is one of the 37 Ramsar sites in India. It is the home for

QUESTION ID:85

Which of the following statements is most appropriate about ‘Y’ chromosome in mammals?

QUESTION ID:86

Which one of the following incidents is not associated with Lyon hypothesis?

QUESTION ID:87

What would be the average packing ratio of DNA in the solenoid structure of chromatin?

QUESTION ID:88

The interaction in which an individual gives up or sacrifice some of its own reproductive potential to benefit another individual is called

QUESTION ID:89

The Hilsa Shad, Tenualosa ilisha, is a migratory fish. It comes under the category of

QUESTION ID:90

The excretory products of earthworm are

QUESTION ID:91

A researcher was observing tail regeneration of Planeria injecting with RNAi for β-catenin mRNA into the blastema. What would be the expected result of his experiment?

QUESTION ID:92

During development in placental mammal, the fertilized egg undergoes division to form a blastocyst. The outermost cells of the blastocyst differentiate to form ‘a thin layer of cells’, which then invades the uterus and begins to form the placenta. This ‘thin layer of cells’ is known as

QUESTION ID:93

Excretory organ of Herdmania is

QUESTION ID:94

Which of the following environmental pollutants causes methemoglobinemia in humans?

QUESTION ID:95

According to Pressure Flow Model, mass flow of solute from source to sink occurs due to

QUESTION ID:96

‘Congo jute’ an important superior jute substitute, is produced from

QUESTION ID:97

The chromosome number of antipodal cells of a cereal plant is 10. What would be the chromosome number in the cells of aleurone layer of the grain of this plant?

QUESTION ID:98

Which of the following pumps triggers pollen tube growth and discharge in the event of double fertilization?

QUESTION ID:99

The spirochetes form one of the major phyla of the Eubacteria and are characterized by the following features except

QUESTION ID:100

Primary production in an aquatic ecosystem is usually measured using Light-and-Dark-bottle technique. In this method, the dissolved oxygen concentration of the pond water enclosed in a BOD bottle before incubation (I) and after a fixed duration of incubation in a dark bottle (D) and light bottle (L) were measured. Then, the gross and net primary productivity of this system may be estimated as