Previous Year Questions

QUESTION ID:2

Arrange the following elements in increasing order of their electronegativity according to the Pauling scale

C, Na, Be and Br 

QUESTION ID:3

Which one of the following is NOT a plant vascular tissue? 

QUESTION ID:4

A growing shoot of a germinating seedling encounters an underground obstacle. Which one of the following hormones elicits ‘triple response’ to the underground obstacle?

QUESTION ID:5

Which one of the following pairs of antibodies contains ‘J-chain’ in their multimeric form? 

QUESTION ID:6

Restriction enzymes that recognize the same nucleotide sequence but cleave at different positions are called 

QUESTION ID:7

Which one of the following does NOT belong to the freshwater ecosystem? 

QUESTION ID:8

Which one of the following is transcribed by RNA polymerase III in eukaryotes? 

QUESTION ID:9

Given the following sets:

𝐴 = {2, 4, 6, 8, 10, 12}

𝐵 = {8, 10, 12, 14, 16, 18}

𝐶 = {7, 8, 9, 10 11, 12, 13}

(𝐴 ∩ 𝐵) ∪ (𝐵 ∩ 𝐶) is

QUESTION ID:10

Rain is falling vertically with a speed of 40 m s ^-1 . Wind starts blowing with a speed of 16 m s ^-1 in the west to east direction. How should a person, who is standing, hold his umbrella to avoid getting wet? 

QUESTION ID:11

Which one of the following statements about the G1 checkpoint of eukaryotic cell division cycle is INCORRECT? 

QUESTION ID:12

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].

Assertion [a]: Nitric oxide is involved in transient paracrine and autocrine signaling.

Reason [r]: Nitric oxide is highly reactive, with a lifetime of few seconds, yet can diffuse freely across membranes 

QUESTION ID:13

In mice, a trait is determined by a dominant allele Y and recessive allele y. What proportion of the offspring from a YY × yy cross is expected to be homozygous recessive in F1 generation?

QUESTION ID:14

Match the molecules in Group I with the type of bonds present in them, in Group II

QUESTION ID:15

What is the splitting pattern of proton H^a of the following compound in its ¹H NMR spectrum? 

QUESTION ID:16

Which one of the following statements is correct about solute transport across membranes? 

QUESTION ID:17

Match the type of DNA repair mechanism in Group I with the enzyme(s) involved in Group II

QUESTION ID:18

Tetracycline binds to the 

QUESTION ID:19

In the ‘Southern blot’ technique, which of the following reagents is used to detect the presence of a desired DNA fragment? 

QUESTION ID:20

The pedigree given below shows individuals affected (shaded circles/rectangles) by chronic hypertension. Assuming 100% penetrance, the inheritance of this trait is

QUESTION ID:21

Which one of the following statements about photoproteins in plants is INCORRECT?

QUESTION ID:22

Match the microorganisms in Group I with the human disease in Group II

QUESTION ID:23

Which one of the following is correct in the case of conjugation of a high frequency recombination (Hfr) strain with Fstrain of E. coli? 

QUESTION ID:24

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].

Assertion [a]: The cardiovascular organization called double circulation provides vigorous flow of blood to the brain, muscles, and other organs.

Reason [r]: The blood is pumped a second time after it loses pressure in the capillary beds of the lungs or skin.

QUESTION ID:25

The inability in humans to taste capsaicin resides in a single gene difference between two alleles P and p. The allele P for tasting is dominant over the nontasting allele. In a population of 400 individuals in Hardy-Weinberg equilibrium, 64 are nontasters. How many individuals are heterozygous for the gene?

QUESTION ID:26

A genetic linkage map represents the 

QUESTION ID:27

Class II MHC molecules are NOT expressed by 

QUESTION ID:28

Which one of the following enzymes is required to ensure the replication of a negative-sense or negative-strand RNA virus? 

QUESTION ID:29

The relationship between birth weight and degree of survival  in 6908 human births in an obstetric hospital is shown in the figure below. The mode of selection for birth weight is

QUESTION ID:30

Match the recombinant DNA products in Group I with its application in Group II

QUESTION ID:31

Which of the following statement(s) is/are correct about telophase? 

QUESTION ID:32

The characteristic morphological change(s) in cells undergoing apoptosis is/are 

QUESTION ID:33

A species of fish living in a lake are separated by drying up of the lake into two separate lakes. After several hundreds of years of separation, the two groups are unable to mate. These groups are now considered to be different_______. 

QUESTION ID:34

Which of the following compound(s) is/are aromatic? 

QUESTION ID:35

Which of the following statement(s) is/are correct for the following compound?

QUESTION ID:36

Which of the following is/are essential feature(s) of high-fidelity DNA polymerases used in polymerase chain reaction? 

QUESTION ID:37

Which of the following option(s) represent(s) the evolutionary relationship between the bird and bat wings as structures for flying? 

QUESTION ID:38

Different segments of a photosynthetic filamentous alga are exposed to different wavelengths of light as shown below. After a period of time, bacteria known to migrate towards high oxygen concentration, is spread on the surface of the alga. Which region(s) of the alga will have maximum bacterial congregation? 

QUESTION ID:39

Hyperventilation (breathing rapidly and deeply) causes which of the following event(s) in the arterial blood? 

QUESTION ID:40

Which of the given statement(s) about synthetic oligonucleotides is/are correct?

QUESTION ID:41

The net number of molecule(s) of NADH formed from one molecule of glucose in glycolysis under aerobic conditions is/are _______.

QUESTION ID:42

The number of possible unique combination(s) of linear tetrapeptides that can be made from four different amino acids using each amino acid only once in the chain is/are _______.

QUESTION ID:43

Among i-BuNH₂, NH₃, Me₂NH, EtNH₂, the number of compound(s) more basic than MeNH₂ is/are _______.

QUESTION ID:44

Among K⁺ , Li⁺ , Rb⁺ , Cs⁺ , the number of cation(s) having ionic radii more than Na⁺ is/are _______.

QUESTION ID:45

Among the five fragments given below,

the number of fragment(s) accelerated to the analyzer tube in mass spectrometer with electron ionization is/are _______. 

QUESTION ID:46

A restriction endonuclease has a recognition site of 3 bases. Assuming random arrangement of nucleotides, the probability that this endonuclease will cut a piece of DNA is _______ (rounded off to three decimal places). 

QUESTION ID:47

A massless ideal spring is hanging vertically. A sphere of mass of 500 g, suspended from the spring, stretches the spring from its initial position by 50 cm when it reaches equilibrium. The force constant of the spring is _______ N m^-1 . (Use g=10 m s^-2 

QUESTION ID:48

Whales can dive undersea to depths of 2 km. The pressure on the whale at this depth (ignoring atmospheric pressure) is _______ × 10⁶ Pa.

(Density of sea water = 1 g cm^-3 and g =10 m s^-2 ) 

QUESTION ID:49

The order of differential equation 

QUESTION ID:50

The value of  _________.

QUESTION ID:51

The ∆G´ and K´_eq values of ATP hydrolysis are -32.34 kJ mol^-1 and 4.6 x10⁵ , respectively. The ∆G´ and K´_eq values of enzymatic hydrolysis of glucose-6- phosphate to glucose and phosphate are -13.18 kJ mol^-1 and 203.8, respectively. The ∆G´ value of reaction of glucose-6-phosphate formation from glucose and ATP by hexokinase is _______ kJ mol^-1 (rounded off to 2 decimal places). [All reactions are carried out at pH 7.0 and 25 °C].

QUESTION ID:52

K_m and V_max of an enzyme preparation are 5 µM and 30 µM min^-1 respectively. Considering, K_i value of competitive inhibitor is 60 µM, the velocity (V₀) of this enzyme-catalyzed reaction in the presence of 200 µM of substrate and 600 µM of competitive inhibitor is _______ µM min^-1 (rounded off to two decimal places). 

QUESTION ID:53

The heat required to convert 2 kg of water at 20 °C in a calorimeter to steam at 100 °C and at atmospheric pressure (1 atm) is _______ kJ. (Specific heat capacity of water is 4.2 kJ kg^-1 K ^-1 and latent heat of steam is 2256 kJ kg^-1 )

QUESTION ID:54

An electron is accelerated from rest through a potential difference of 200 V. The de Broglie wavelength associated with this electron is _______ nm. (Rounded off to 2 decimal places) (Planck’s constant = 6.6 × 10^-34 J s, 1eV=1.6 × 10^-19 J, mass of an electron = 9.1×10 ^-31 kg)

QUESTION ID:55

Given data consists of distinct values of 𝑥_𝑖 occurring with frequencies 𝑓_𝑖 . The mean value for the data is _______. (rounded off to one decimal place) 

QUESTION ID:56

A random variable X and its probability distribution is given below. The value of P(X<5) is _______. (rounded off to one decimal place)

QUESTION ID:57

A protein solution of 1 µM has transmission of 40 % at 280 nm, when measured in a 1 cm cuvette using a UV-Visible spectrophotometer. The transmission of the same solution, when measured using a 2 cm cuvette is _______ %. (rounded off to the nearest integer)

QUESTION ID:58

If a bacterial culture with a doubling time of 30 minutes starts with two cells, then the number of cells after 4 hours are _______.

QUESTION ID:59

The rate of transcription in a bacterium is 50 nucleotides/min and the average molecular weight of an amino acid is 110 Da. Time taken for synthesis of the mRNA of a protein with molecular weight of 110 kDa is _______ min. (rounded off to one decimal place) Assume no abortive transcriptions and no sequences upstream of the start codon. 

QUESTION ID:60

Consider a first order reaction 𝐴 → 𝐵. The initial concentration of 𝐴 is 100 mol L^-1 and the value of first order rate constant is 0.01 min^-1 . The concentration of 𝐴 after 10 min of reaction is __________ mol L^-1 (rounded off to one decimal place).