Previous Year Questions

QUESTION ID:2

Which of the following hormones promotes seed dormancy in plant?

QUESTION ID:3

In a basket, there are 6 red flowers, 5 white flowers and 4 pink flowers. If 2 flowers are picked up randomly by a student, what is the probability that the selected flowers are of same colour?

QUESTION ID:4

During gastrulation, splitting of one cellular sheet into two parallel sheets is known as

QUESTION ID:5

Select the correct decreasing order of pH of the following cellular compartments.

QUESTION ID:6

Peristome in Funaria consists of two sets of long and conical teeth that take part in spore discharge. Which of the following shows hygroscopic movement?

QUESTION ID:7

Gastric secretion is not inhibited by the

QUESTION ID:8

If the distribution is negatively skewed, then the

QUESTION ID:9

Bacillus Calmette Guerin (BCG) is a vaccine primarily used for the prevention of tuberculosis (TB) disease is prepared by which of the following methods?

QUESTION ID:10

miRNA based gene silencing is a type of

QUESTION ID:11

Distinguishing feature of confocal microscope is

QUESTION ID:12

In human, normal B and T cells develop CD4⁺ and CD8⁺ at first and then they differentiate into CD4⁺ CD8^- and CD4^- CD8⁺. If there is a defect in development, which quadrant of the flow cytometer graph will show more density?

QUESTION ID:13

The distinguishing feature of the confocal microscopy is the use of

QUESTION ID:14

Embryo culture technique is employed for

QUESTION ID:15

During oogenesis, a group of somatic cells form a covering around the developing egg cell. This covering is called

QUESTION ID:16

Inductively Coupled Plasma Mass Spectrometer (ICP-MS) principle is similar to which of the following?

QUESTION ID:17

A researcher injected exogenous β-catenin at the future ventral side of a Xenopus gastrula. What result did he obtain?

QUESTION ID:18

QUESTION ID:19

When a freshwater fish migrates downstream in search of food, this kind of migration may be referred to as

QUESTION ID:20

‘Pen culture’ is one of the well known enclosed culture techniques practiced in aquaculture. In pen culture, the cage introduced in the water body

QUESTION ID:21

The predictable and gradual change in the species composition of a given area is called

QUESTION ID:22

Plasmodium sp., the malarial parasite is having a complex life cycle. The fusion between male and female gametocytes of Plasmodium occurs inside the

QUESTION ID:23

Identification of relative abundance of a specific protein or a specific protein modification at a certain region in the genome by a method is known as

QUESTION ID:24

In order to evade the immune response from the host, molecular mimicry is exhibited by

QUESTION ID:25

In a honey bee colony, the role of the workers can be best explained by

QUESTION ID:26

Some kinds of touch, such as stroking a dog or cat, are especially pleasant. Which one of the following receptors found mostly in the fingertips probably play important role in this?

QUESTION ID:27

In a terrestrial area with known number of food plants, several species of herbivore land snails can coexist if they exhibit

QUESTION ID:28

Which of the following organizations promotes sustainable management and conservation of tropical forests?

QUESTION ID:29

Upwelling is an important oceanographic phenomenon. What is the significance of upwelling zone for marine ecosystems?

QUESTION ID:30

Which of the following survivorship curves is suitable for the organisms who breed several times during the course of their life span?

QUESTION ID:31

A group comprising of two or more sets of taxa, whose most recent common ancestor is not a member of the same group is called as

QUESTION ID:32

Haemophilia is a sex-linked recessive trait in human. If both father and son are haemophilic and mother is normal, what would be the genotype of the mother?

QUESTION ID:33

The larva that occurs in the development of a polychaete worm is

QUESTION ID:34

The variant of lactate dehydrogenase predominantly found in brain is

QUESTION ID:35

Formation of extra-embryonic membrane is one of the most remarkable features in the evolution of the vertebrates. In geological time scale, extra-embryonic membrane appeared for the first time in

QUESTION ID:36

The cambial layer of the periderm is termed as

QUESTION ID:37

After exposure of a xenobiotic substance to a biological system, its apparent volume of distribution will be larger, if it is a

QUESTION ID:38

Panhypopituitarism is a condition where a type of dwarfism is found with other symptoms in the affected individual. It happens due to

QUESTION ID:39

A major group of animals having radially symmetrical adults, but bilaterally symmetrical larva is

QUESTION ID:40

Which of the following brain centres receives a motor plan from the motor cortex before the execution of a movement?

QUESTION ID:41

Crescent shaped or banana shaped gametocytes are seen in infection with

QUESTION ID:42

In Selaginella, trabeculae are modified

QUESTION ID:43

The adaptation of an animal which warns a predator that it is toxic, distasteful or dangerous is called

QUESTION ID:44

Among algae, presence of a phragmoplast during cytokinesis is a general feature of

QUESTION ID:45

Which theory states that organisms contain coded information that dictates their form, function and behaviour?

QUESTION ID:46

Probability of dissociation of a solution of DNA double helix into its component single strands by removing certain susceptible protons is the highest in which one of the following pH values?

QUESTION ID:47

What would be the value of [E′°(V)] standard reduction potential of the following biologically important half-reaction at 25°C and pH 7.0?

  NAD⁺ + H⁺ + 2e^- → NADH

QUESTION ID:48

In echinoderms, the neuropeptide signal releases a hormone that affects the reproductive system is called

QUESTION ID:49

During C₃ pathway when 3 molecules of CO₂ are fixed, how many molecules of ATP and NADPH are utilized?

QUESTION ID:50

What is the role of Schwann cells in peripheral nerve impulse transmission?

QUESTION ID:51

A major application of liposomes in human medical health-care is

QUESTION ID:52

Plants bearing both hermaphrodite and female flowers on the same individual are designated as

QUESTION ID:53

The direction of helix and rotation per base pair in Z-DNA is

QUESTION ID:54

Which of the following statements is not correct for teichoic acids?

QUESTION ID:55

The actin binding protein that forms a flexible bridge between two actin filaments at various angles is called

QUESTION ID:56

Which of the following amino acids can not participate in α-helix conformation in protein by introducing a destabilizing Kink?

QUESTION ID:57

Yeast 2 hybrid system helps in understanding which one of the following?

QUESTION ID:58

Identify the amino acid that being a constituent of a protein does not function as a substrate for Kinase enzyme.

QUESTION ID:59

If for a distribution, the mean is 10, variance is 16, Y₁ is +1 and β₂ is 4, then the distribution is

QUESTION ID:60

If hydropathy index values of two amino acids, X and Y are respectively +4.5 and –4.5 during their transfer from a hydrophobic solvent to water, then it can be assumed that

QUESTION ID:61

Transfection is a modern and powerful method by which foreign nucleic acids are delivered into eukaryotic cells to modify their genetic makeup. Which one of the following is not a commonly used physical / mechanical transfection approach?

QUESTION ID:62

Which one of the following restriction endonucleases generate fragments with blunt ends?

QUESTION ID:63

Virus free plants can be generated from a viral infected individual through

QUESTION ID:64

Proteins bearing Mannose-6-phosphate and KDEL signal sequence at the C-terminus carry signals for directing a protein respectively into

QUESTION ID:65

A method adopted to localize genes on a particular chromosome within a cell using fluorescent probe is called

QUESTION ID:66

In gel-filtration chromatography, the term void volume (V₀) is usually referred to as the

QUESTION ID:67

Which one of the following statements is not true regarding differentiation of different cell types originating from embryonic germ layers?

QUESTION ID:68

In a randomly mating population two phenotypes are segregating; one is due to dominant allele (T), the other to a recessive allele (t). The frequencies of the dominant and recessive phenotypes are 0.75 and 0.25 respectively. What would be the frequency of dominant allele?

QUESTION ID:69

In which of the following events, serotonin-secreting interneurons facilitate presynaptic neurons?

QUESTION ID:70

The bacterial ribosome (70S) is composed of two asymmetric subunits, the 30S and 50S. In Escherichia coli the small 30S subunit is composed of

QUESTION ID:71

Which one of the following conditions will hamper completion of cell cycle by progression through mitosis in a proper manner?

QUESTION ID:72

Certain Mycoplasmas contain lipoglycans in addition to sterols. Which one of the followings is not a correct statement for lipoglycans?

QUESTION ID:73

In liquid scintillation counter, which of the followings is a fluorescent substance?

QUESTION ID:74

A sparger is an essential component of a typical fermenter and is used to

QUESTION ID:75

A rare autosomal recessive disease is expressed in a child. Only one parent of the child is a carrier. Which of the followings best explains expression of this disease?

QUESTION ID:76

Which one of the following pairs is constituted of an excitatory and an inhibitory neurotransmitter respectively?

QUESTION ID:77

Electron Spin Resonance (ESR) is based on the

QUESTION ID:78

During fertilization, which part of the female gametophyte is responsible for pollen tube growth arrest — a task that plays significant role in zygote formation?

QUESTION ID:79

Which of the following molecules depresses cardiac contractility by disrupting F-actin?

QUESTION ID:80

Cytokinin oxidase is a key enzyme that is responsible for degradation of endogenous cytokinin in plants. To understand the gene function in regulation of cytokinin, if you overexpress a cytokinin oxidase gene (CKX) in tobacco, which one of the following would be the expected phenotype of the plant?

QUESTION ID:81

The type of ovule, where the ovule is curved in such a way that the micropyle comes near to the hilum, is termed as

QUESTION ID:82

Which of the following class of genes maintains the boundary of floral organ development?

QUESTION ID:83

Which of the following hormones decreases insulin sensitivity and also decreases utilization of glucose in the mother during pregnancy?

QUESTION ID:84

In Arabidopsis, which of the following auxin transporters that redirects auxin laterally back into the vascular parenchyma tissue?

QUESTION ID:85

Phloem tissue in gymnosperm lacks

QUESTION ID:86

Lichenin also called lichenan is a complex glucan occurring in certain species of lichen. Which of the following statements is not correct for lichenin?

QUESTION ID:87

Cleavage polyembryony in plant is a type of polyembryony where

QUESTION ID:88

Which of the following adverse health effects is not probably protected by a diet rich in potassium?

QUESTION ID:89

A random sample of 100 pre-school children revealed that only 80 have been vaccinated. Provide an approximate 95% confidence interval for the proportion vaccinated in that locality. (Given, Z_0.025 = 1.96)

QUESTION ID:90

QUESTION ID:91

Presence of nucleolus within the nucleus can be differentially located using

QUESTION ID:92

A researcher obtained one Drosophila specimen with four wings. He exclaimed this as a bizarre phenotype, as Drosophila is a dipteran insect. He screened out the gene responsible for this mutation. What gene he could identify for this bizarre phenotype?

QUESTION ID:93

After meiosis I, the resultant daughter cells contain

QUESTION ID:94

Find out the value of numerical aperture (NA) of a compound microscope having limit of resolution 200 nm and a source of light with 400 nm wavelength.

QUESTION ID:95

The only positive evidence of aquatic ancestry of bryophyte is indicated by the presence of

QUESTION ID:96

For producing monoclonal antibodies in vivo, mice are primed by intraperitoneal injection with

QUESTION ID:97

Downy mildew of Crucifer is caused by

QUESTION ID:98

The diatoms do not easily decay like other algae as because

QUESTION ID:99

Which of the followings best explains why do inhabitants of an estuary adapt to frequent environmental changes?

QUESTION ID:100

The assembly of abundant golgi vesicles near the cell plate of a plant cell at late telophase and at cytokinesis of mitosis reflects the role of golgi complex in