Previous Year Questions

QUESTION ID:2

Ethylbutyrate is responsible for the odor of pineapple. Which one of the following is the structure of ethyl butyrate?

QUESTION ID:3

If the blood groups of mother and father are AB and O, respectively, what are the blood groups possible for their child? 

QUESTION ID:4

Which one of the following features distinguishes between gymnosperms and angiosperms? 

QUESTION ID:5

Ecosystem ecology is the study of 

QUESTION ID:6

Bacterial strains that do not grow in the absence of a specific nutrient are called 

QUESTION ID:7

The type of immunological protection provided by plasma therapy is 

QUESTION ID:8

Which one of the following components of bacterial cell acts as endotoxin?

QUESTION ID:9

The moment of force in terms of fundamental dimensions is 

QUESTION ID:10

Let 𝐴 = and 𝐵 =  If 𝐴𝑋 + 3𝐵 = 0, then the determinant of 𝑋 is

QUESTION ID:11

In a genetic cross between plants bearing violet flowers and green seeds (VVGG), and white flower and yellow seeds (vvgg), the following phenotypic distribution was obtained in the F2 progeny (assume both parents to be pure breeding for both the traits, and self-cross at F1 generation):

i) 2340 plants with violet flowers and green seeds

ii) 47 plants with violet flowers and yellow seeds

iii) 43 plants with white flowers and green seeds

iv) 770 plants with white flowers and yellow seeds

Which one of the following interpretations explains the above phenotypic distribution? 

QUESTION ID:12

IUPAC name of the following molecule is

QUESTION ID:13

Which one of the following features/properties does glucose acquire through intramolecular hemiacetal formation? 

QUESTION ID:14

The following methylation is carried out in various solvents such as benzene, tetrahydrofuran (THF), dimethoxyethane (DME), dimethyl sulfoxide (DMSO) and N,N-dimethylformamide (DMF). Which one of the following is TRUE for the effect of solvent on the reaction rate?

QUESTION ID:15

Which one of the following is the major product of the hydrogenation reaction given below?

QUESTION ID:16

Which one of the following isomers is thermodynamically most stable?

QUESTION ID:17

What is the significance of the isomerization of glucose 6-phosphate to fructose 6-phosphate for the progression of glycolysis? 

QUESTION ID:18

What is the role of bile salts in the mammalian digestive system?

QUESTION ID:19

Presence of which one of the following in the urine indicates pregnancy in human? 

QUESTION ID:20

Which one of the following processes emerged earliest during the course of evolution? 

QUESTION ID:21

Which one of the following microscopic techniques provides a 3-dimensional perspective of live, unstained and transparent specimens obtained from the wild?

QUESTION ID:22

Which one of the following represents the motion of an object with a positive acceleration?

QUESTION ID:23

A stationary enemy ship is docked in the sea at a distance of 1.0 km from the coastline. A gun located at the sea level on the coastline can fire projectiles at a velocity of 120 m/s. What is the angle (in degrees) above the horizontal at which the gun must fire to hit the ship? [g = 9.8 m/s² ] 

QUESTION ID:24

QUESTION ID:25

The value of the integral where 𝑓(𝑥) = 

QUESTION ID:26

In plants, the ovules are attached to the ovary by

QUESTION ID:27

The lack of linear correlation between the genome sizes and genetic complexities among various species is known as 

QUESTION ID:28

Match the cell junctions listed in Group A with their correct functions listed in Group B:

QUESTION ID:29

In mammals, females have two X chromosomes and males have one X chromosome. Equal expression of X-chromosome genes in both sexes is ensured by 

QUESTION ID:30

The difference between mitosis and meiosis I is 

QUESTION ID:31

Infrared (IR) spectroscopy is used for determining certain aspects of the structure of organic compounds. Which of the following statement(s) is/are FALSE? 

QUESTION ID:32

Oleic acid, shown below, is

QUESTION ID:33

Cyclic AMP (cAMP) acts as a second messenger for which of the following primary signaling molecule(s)? 

QUESTION ID:34

Which of the following is/are TRUE about the electron carrier, ubiquinone (coenzyme Q)? 

QUESTION ID:35

Which of the following is/are common to both prokaryotic and eukaryotic gene expression? 

QUESTION ID:36

Which of the following molecular genetic technique(s) is/are used in forensic science? 

QUESTION ID:37

Which of the following is/are involved in the initiation of DNA replication? 

QUESTION ID:38

Which of the following pairs is/are analogous structures?

QUESTION ID:39

A charged particle accelerated by a potential V moves in a circular path with a velocity v in a uniform magnetic field B that is perpendicular to the motion. Which of the following is/are correct if the value of V is increased? 

QUESTION ID:40

A function is defined as where   is the domain. The domain(s) on which the function 𝑓(𝑥) is one to one is/are 

QUESTION ID:41

1.45 g of sucrose (C₁₂H₂₂O₁₁) is dissolved in 30.0 ml of water. Molality (rounded off to 3 decimals) of the resulting solution is _____ m

QUESTION ID:42

For a gene present on human chromosome 4, the maximum number of alleles that may be detected by sequencing the genome of 5 males and 10 females is ______.

QUESTION ID:43

The amount of hydrogen required to reduce 30 g of 2-butene is ______ g (rounded off to 2 decimals). 

QUESTION ID:44

The molar concentration of water in pure water is ____ M (rounded off to 1 decimal).

QUESTION ID:45

The number of triplet codon(s) for methionine is ___.

QUESTION ID:46

The number of peptide bonds in a 20-residue linear peptide is ___.

QUESTION ID:47

When the molecular weight of human immunoglobulin light chain is 24 kDa, the total molecular weight of human IgG is ___ kDa.

QUESTION ID:48

The maximum number of genotypes possible for gametes formed from a diploid cell of the genotype AaBBcCDd is _____.

QUESTION ID:49

The de Broglie wavelength of a proton moving at a speed of 1.0 m/s is _____ Å.

[Planck’s constant = 6.626 x 10^-34 m ² kg/s; m_p = 1.67 x 10^-27 kg]

QUESTION ID:50

The distance between the parallel lines 2𝑥 + 5𝑦 = 7 and 2𝑥 + 5𝑦 = 15 is ______ (rounded off to 2 decimals). 

QUESTION ID:51

At 25°C and pH 7.0, the concentrations of glucose 1-phosphate and glucose 6-phosphate are 2.0 mM and 38 mM, respectively at equilibrium. The standard free energy change for the conversion of glucose 1-phosphate to glucose 6-phosphate is ____ J/mol. [R = 8.315 J mol⁻¹ K ⁻¹ ]

QUESTION ID:52

The number of chiral carbons in strychnine is ______. 

QUESTION ID:53

The number of polypeptide chains in a core nucleosome is ____.

QUESTION ID:54

While performing a PCR, the student forgot to add one of the two primers. The number of molecules of single-stranded DNA produced after 25 PCR cycles is ____

QUESTION ID:55

A double helical DNA molecule is composed of 32 mol % of adenosine. The mol % of cytosine in this DNA molecule is _____.

QUESTION ID:56

In a compound microscope, the magnification power of the objective lens is 100x, and that of the eye piece (ocular lens) is 10x. The magnification power of the microscope is _____ x.

QUESTION ID:57

In a population at Hardy-Weinberg equilibrium, for gene-X only two alleles, namely A and a, are found. If frequency of allele A is 0.2 and the frequency of allele a is 0.8, the frequency of the heterozygote genotype Aa in that population will be _____ (correct to 2 decimal places)

QUESTION ID:58

In the circuit shown below, the power dissipated across the 3Ω resistor is _____ W.

QUESTION ID:59

The equation  has a solution, where 𝛽 is a natural number. Then 𝛽 is _______.

QUESTION ID:60

The velocity of blood in a blood vessel of 2.0 cm radius is 30 cm/s. When the blood vessel bifurcates into 2 smaller vessels of radius 1.0 cm each, the velocity of blood in each of the smaller vessels is _____ cm/s. Assume that the vessel walls are rigid, and blood is incompressible.