Previous Year Questions

QUESTION ID:2

Which is the least among the following? 0.330.33, 0.440.44, π-1/π, e-1/e

QUESTION ID:3

What is next number in this “see and tell” sequence?
1 11 21 1211 111221 ______

QUESTION ID:4

A vertical pole of length a stands at the centre of a horizontal regular hexagon ground of side a. A rope that is fixed taut in between a vertex on the ground and to tip of the pole has a length

QUESTION ID:5

A peacock perched on the top of a 12 m high tree spots a snake moving towards its hole at the base of the tree from a distance equal to thrice the height of the tree. The peacock flies towards the snake in a straight line and they both move at the same speed. At what distance from the base of the tree will the peacock catch the snake?

QUESTION ID:6

The cities of a country are connected by intercity roads. If a city is directly connected to an odd number of other cities, it is called an odd city. If a city is directly connected to an even number of other cities, it is called an even city. Then which of the following is impossible?

QUESTION ID:7

In the figure angle ABC=π/2 and AD =DE =EB What is the ratio of the area of triangle ADC to that of triangle CDB?

QUESTION ID:8

A rectangular sheet ABCD is folded in such a way that vertex A meets vertex C, thereby forming a line PQ. Assuming AB= 3
and BC=4, find PQ. Note that AP = PC and AQ=QC.
 

QUESTION ID:9

A string of diameter 1mm is kept on a table in the shape of a close flat spiral i.e., a spiral with no gap between the turns. The area of the table occupied by the spiral is 1 m2. Then the length of the string is

QUESTION ID:10

25% of 25% of a quantity is x % of the quantity where x is

QUESTION ID:11

In sequence {an} every term is equal to the sum of all its previous terms.

QUESTION ID:12

In the figure below, angle ABC = π/2. I, II, III are the areas of semicircles on the sides opposite angles B, A, and C, respectively. Which of the following is always true?

QUESTION ID:13

What is the minimum number of days between one Friday the 13th and the next Friday the 13th (Assume that the year is a leap year).

QUESTION ID:14

Suppose a person A is at the North-East comer of a square (see the figure below). From that point he moves along the diagonal and after covering 1/3rd portion of the diagonal, he goes to his left and after sometime he stops, rotates 90° clockwise and moves straight. After a few minutes he stops, rotates 1800 anticlockwise. Towards which direction he is facing now?
 

QUESTION ID:15

Cucumber contains 99% water. Ramesh buys 100 kg of cucumbers. After 30 day of storing, the cucumbers lose some water. They now contain 98% water. What is the total weight of cucumbers now?

QUESTION ID:16

In a museum there were old coins with their respective years engraved on them, as follows.
(A) 1837 AD (B) 1907 AD (C) 1947 AD (D) 200 BC
Identify the fake coin(s)

QUESTION ID:17

A student observes the movement of four snails and plots the graphs of distance moved as a function of time as given in
figures (A), (B) (C) and (D).
Which of the following is not correct?
 

QUESTION ID:18

Find the missing letter
 

QUESTION ID:19

Consider the following equation
x² + 4y² + 9z² = 14x + 28y+42z + 147
Where, x, y and z are real numbers. Then the value of x+2y+3z is

QUESTION ID:20

The map given below shows a meandering river following a semi-circular path, along which two villages are located at A and B, The distance between A and B along the east-west direction in the map is 7 cm.
What is the length of the river between A and B in the ground?
 

QUESTION ID:21

Out of the following hydrogen bonding schemes shown by ..., which one corresponds to the weakest hydrogen bond in a given solvent condition?

QUESTION ID:22

Which peptide bond (s) marked as a, b, c, d and e will be broken when the following oligopeptide is treated with trypsin at pH 7.0?
Lys—(a) —Arg—(b) —Pro—(c) —Lys—(d) —Arg—(e) —Gly

QUESTION ID:23

During respiration, which of the following processes occur only inside mitochondria and not cytoplasm?

QUESTION ID:24

An enzyme catalyzed reaction was measured in the presence and absence of an inhibitor for an uncompetitive inhibition,

QUESTION ID:25

KCI (100 mM) was entrapped inside large unilamellar vesicles. A diffusion potential across the bilayer can be generated by diluting with buffer containing

QUESTION ID:26

Acetylcholine receptor is an archetype for:

QUESTION ID:27

With reference to lac operon, what will be the phenotype of an E. coli strain having a genotype I- O+ Z+Y-/F' I+ Oc Z-Y+?

QUESTION ID:28

An organism that has peroxidase and superoxide dismutase but lacks catalase is most likely an

QUESTION ID:29

During DNA replication, events at the replication fork require different types of enzymes having specialized functions except

QUESTION ID:30

Which of the following names is appropriate for the sequence 5' –G/ANNAUG -3' in a mammalian mRNA?

QUESTION ID:31

The specificity of tRNA recognition by a aminoacyl tRNA synthetase that is intrinsic to the tRNA molecule lies on

QUESTION ID:32

Viral gene expression after T3 bacteriophage infection is controlled by:

QUESTION ID:33

Which of the following factors is NOT true for the low levels of immune response in Plasmodium infection?

QUESTION ID:34

Presence of the nuclear localization signal (NLS) in a steroid receptor indicates that the receptor resides

QUESTION ID:35

Which of the following is an intracellular anchor protein?

QUESTION ID:36

Out of the following matches of oncogenes with the proteins that each specifies, which one is incorrect?

QUESTION ID:37

Capacitation of sperms in humans

QUESTION ID:38

With respect to development of any organism, "autonomous specification" would result in which type of development?

QUESTION ID:39

The group of cells which generates the vascular tissues including the pericycle in roots of higher plants are called

QUESTION ID:40

If an embryo undergoes 13 cleavage divisions during embryogenesis, then the size of the embryo compared to zygote

QUESTION ID:41

The chlorosis (yellowing) symptom of iron deficiency is influenced by

QUESTION ID:42

A plant hormone that promotes the acquisition of desiccation tolerance in developing seed is

QUESTION ID:43

Change in Ca2+ concentration can initiate various responses in plants. Which one of the following responses is NOT known to be initiated by change in Ca2+ concentration?

QUESTION ID:44

Water can move through the soil-plant-atmosphere continuum, only if water potential (ψw) along that path

QUESTION ID:45

Which one of the following is responsible for the ejection of milk from mammary glands in mammals?

QUESTION ID:46

nerve fibre cannot be stimulated during the absolute refractory period of a previous stimulation because

QUESTION ID:47

The T-waves of ECG indicates

QUESTION ID:48

Blood group type A antigen is a complex oligosaccharide which differs from H antigen present in type O individual by the presence of terminal

QUESTION ID:49

A cross was made between pure wild type males and brown eyed curled winged females of D. melanogaster. The Fl females
were test crossed. The F2 progeny obtained was as follows: .
Wild type                                            200
Brown eyes, curled wings                  150
Brown eyes, normal wings                  30
Normal eyes, curled wings                  20
Total                                                    400
The genetic distance (cM) between brown eye and curled wing loci is:

QUESTION ID:50

The effect of nonsense mutation could be nullified by reversion as well as suppression. Which of the following processes will help to distinguish between the two kinds of revertants?

QUESTION ID:51

2- Aminopurine induces mutation by

QUESTION ID:52

In a transformation experiment, donor DNA from an E. coli strain with the genotypes Z+Y+ was used to transform a strain of genotype Z- Y-. The frequencies of transformed classes were:
Z+Y+      200
Z+Y-       400
Z-Y+      400
Total      1000
What is the frequency (%) with which Y locus is cotransformed with the Z locus?

QUESTION ID:53

The ‘Tribe” refers to a taxonomic group recognized between the

QUESTION ID:54

A plant species has been descrobe for the fisrt time by a author “x”. Later, the species has been transferrred to some other genys by author “y”. Then the author citation for the new combination will be

QUESTION ID:55

The group which is no longer considered under the fungi is

QUESTION ID:56

Character similarity that can be misinterpreted as common descent is called

QUESTION ID:57

The following table shows survival and fertility data for a seasonally breeding species. Based on above data net reproductive rate (Ro) of the species will be Season Proportion Surviving Fertility

QUESTION ID:58

Which of the following is NOT a characteristic of late successional forest plant species?

QUESTION ID:59

Which of the following organism do not possess the ability to fix nitrogen?

QUESTION ID:60

Which of the following greenhouse gases has got highest atmospheric life time?

QUESTION ID:61

Which of the following evolutionary processes played an important role in the evolution of immune system?

QUESTION ID:62

In some species of new world monkeys, only one female reproduces in a group. One or more younger females have suppressed reproduction and asssit the reproductive female. This is an example of

QUESTION ID:63

In bird species where both parents contribute equally to parental care, generally

QUESTION ID:64

The idea that an altruistic gene will be favored if r>C/B, where r is the coefficient of relatedness, B is the benefit to the recipient of the altriusm, and c is the cost incurred to the donor, is known as

QUESTION ID:65

Usse of double haploids in plant breeding helps to

QUESTION ID:66

For sustainable expression of a trangene in the successive generation of a cell line in culture, the ideal gene transfer can be obtained using

QUESTION ID:67

Desulphovibrio desulfuricans (A) and Pseudomonas species (B) are involved in mercury bioremediation. Which of the statement below is correct?

QUESTION ID:68

Optical density of a 400 base pair llong 1 ml DNA solution was found to be 0.052. How many DNA molecules are present in the solution? [1 base pair=650 dalton, optical density of 1.0 D corresponds to 50 μg DNA/ml]

QUESTION ID:69

In which of the following techniques does molecular fragmentation offer clues to the covalent chemical structures of biomolecules?

QUESTION ID:70

The movement of a single cell was required to be continually monitored during development. This cell was marked with a reporter gene. To visualize this movement one would use

QUESTION ID:71

The Gibbs free energy of binding of a ligand with a protein is determined using calorimetric measurements at 25°C. The value of ΔGo thus determined is 1.36 kcal/mole. The binding constant for the ligand-protein association is:

QUESTION ID:72

A is converted to E by enzymes EA, EB, EC, ED. The Km(M) values of the enzymes are 10-2, 10-4, 10-5 and 10-4, respectively. If all the substrates and products are present at a concentration of 10-4 M, and the enzymes have approximately the same Vmax the rate limiting step will be

QUESTION ID:73

The molecular mass of a protein determined by gel filtration is 120 kDa. When its mass is determined by SDS.PAOE with and without β-mercaptoethanol, it is ooly 60 kDa. What is the most probable explanation for these observations?

QUESTION ID:74

Mouse IgG is left either intact (left lane A,B,C, D) or digested with papain or pepsin or treated with β-mercaptoethanol (β- ME) and run on non-reducing SDS-PAGE and stained with Coomassie blue. In a separate experiment, papain-digested products are immunoblotted with an anti-idiotypic monoclonal antibody. Following four profiles are attributed to each of these treatments. Which one of the following possibilities is correct?

QUESTION ID:75

The citric acid cycle in respiration yields:

QUESTION ID:76

Phosphatidyl serine (PS) is mostly located in the inner bilayer of plasma membrane of red blood cells (RBCs). You have to prove this fact about PS by an experiment. You are provided with PS-specific lytic enzymes (PSE) and other reagents needed. Identify the correct sequence of experiments to be carried out to settle this issue.

QUESTION ID:77

ATP-driven pumps hydrolyze ATP to ADP and phosphate and use the energy released to pump ions or solutes across a membrane. There are many classes of these pumps and representatives of each are found in all prokaryotic and eukaryotic cells. Which of the following statements about these pumps is NOT correct?

QUESTION ID:78

Following are statements related to the organization of the four major protein complexes of thylakoid membrane,
A. Photosystem II is located predominantly in the stacked regions of the thylakoid membrane.
B. Photosystem I is found in the unstacked regions protruding into stroma.
C. Cytochrome B6f complex is confined to stroma only.
D. ATP synthase is located in the unstacked regions protruding into stroma.
Which one of the following combinations of above statements is correct?

QUESTION ID:79

A bacterial population has a plasmid with copy number 'n'. It was observed that on an average in one out of 2(n-1) cell divisions, there was spontaneous plasmid curing. It was inferred from the observation that:
A. Each cell division does not have equal probability of plasmid curing.
B. There is no evidence for any mechanism of plasmid segregation in the two daughter cells.
C. Plasmid distribution to daughter cells is random.
D. Each plasmid has an equal chance of being in either of the two daughter cells.
Which of the combinations of above statements is true?

QUESTION ID:80

In a given experiment the cells were labeled for 30 minutes with radioactive thymidine. The medium was then replaced with that containing unlabelled thymidine and the cells were grown for additional time. At different time points after replacement of medium the fraction of mitotic cells were analysed. Based on the results obtained, the above figure was drawn which shows the percentage of mitotic cells that are labeled as a function of time after brief incubation with radioactive thymidine.

Considering the above experiment, the following statements were made:

A. Cells in the S-phase of the cell cycle during the 30 minute labeling period contain radioactive DNA.
B. It takes about 3 hours before the first labeled mitotic cells appear.
C. The cells enter the second round of mitosis at t30 hours.
D. The total length of the cell cycle is about 27 hours with G1, being more than 15 hours.
Which of the combination of above statements is correct?

QUESTION ID:81

Mutants of lac Y (Y-) gene of E. coli do not synthesize the lactose permease protein. The following statements refer to the behaviour of lac Y- mutants under different experimental conditions.
A. No synthesis of β- galactosidase when Y' cells are induced with lactose.
B. Synthesis of β- galactosidase when cells are induced with lactose.
C. No synthesis of β- galactosidase when cells are induced with IPTG.
D. Synthesis of β- galactosidase when cells are induced with IPTG.
E. The cells induced with IPTG cannot grow in the presence of TONPG (TONPG is a compound, whose uptake is mediated by lactose permease and cleaved by β- galactosidase to release a toxic compound).
F. Cells induced with IPTG Can grow in the presence of TONPG.
Which combination of the above statements is correct?

QUESTION ID:82

The semi-conservative nature of DNA replication was established by Meselson and Stahl in their classic experiment with bacteria. They grew bacteria in N15-NH4Cl containing medium, washed and then incubated in fresh medium with N14- containing compounds and allowed to grow for three generations. CsCl density gradient centrifugation of isolated DNA established the nature of semiconservative DNA replication. The pictorial representation below shows the position of differentially labeled DNA in CsCl density gradient. Had the DNA replication been conservative, what would have been the pattern?