Previous Year Questions

QUESTION ID:2

In DNA replication, the Okazaki fragments are joined by 

QUESTION ID:3

The most abundant type of RNA in a metabolically active mammalian cell is 

QUESTION ID:4

Which organelle in a eukaryotic cell is the site of electron transport chain? 

QUESTION ID:5

RNA is a polymer of 

QUESTION ID:6

Which one of the following is present in a bacterial cell? 

QUESTION ID:7

Which color of light excites a natural GFP to emit green fluorescence? 

QUESTION ID:8

Which one of the following hormones promotes fruit ripening? 

QUESTION ID:9

Which one of the following has a catalytic RNA? 

QUESTION ID:10

The number of significant figures in a reported measurement of 0.00361 is

QUESTION ID:11

Match the terminology in Group I with the stimulus in Group II that generates growth response of plants

QUESTION ID:12

The correct hierarchy of taxa in the Linnaean classification of eukaryotes is 

QUESTION ID:13

Which one of the following statements about polyploidy is correct? 

QUESTION ID:14

Which one of the following hormones is a tyrosine derivative? 

QUESTION ID:15

Which one of the following immunoglobulins crosses the human placenta? 

QUESTION ID:16

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

Assertion [a]: The resolving power of a transmission electron microscope is higher than that of the light microscope.

Reason [r]: The wavelength of electrons is shorter than that of visible light. 

QUESTION ID:17

Match the morphology in Group I with the corresponding microorganism in Group II

QUESTION ID:18

Which one of the following genetic crosses and their results indicates cytoplasmic inheritance? 

QUESTION ID:19

Which of the following is NOT a characteristic morphological feature of apoptotic cells? 

QUESTION ID:20

Competition between two populations in an ecosystem is 

QUESTION ID:21

Adenine constitutes 0.16 mole fraction in a given single-stranded DNA. What is the mole fraction of uracil in the resultant RNA, if this entire DNA fragment is transcribed? 

QUESTION ID:22

Which one of the following is NOT used as a component in subunit vaccines? 

QUESTION ID:23

Metabolic acidosis is associated with decreased plasma level of 

QUESTION ID:24

Genes in two species that are derived from the same ancestral gene in their most recent common ancestor are called 

QUESTION ID:25

An object is placed 15 𝑐𝑚 in front of a convex mirror, which has a radius of curvature 30 𝑐𝑚. Which one of the following is true of the image formed?

QUESTION ID:26

If a variable 𝑧 shows a standard normal distribution, then the percent probability that 0 ≤ z² ≤ 1 is ___________ (rounded off to the nearest integer).

QUESTION ID:27

In chick embryo, the ectoderm generates 

QUESTION ID:28

The boiling points of Iodomethane, Dibromomethane, Bromomethane, Chloromethane follow the order 

QUESTION ID:29

Chromosome duplication during the cell cycle occurs in 

QUESTION ID:30

Ionic character of the covalent bonds in the compounds Cl₂, HCl, NaCl, NaF follows the order 

QUESTION ID:31

Which of the following is/are lateral meristems? 

QUESTION ID:32

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

QUESTION ID:33

Which of the following statement(s) about eukaryotic DNA topoisomerase is/are correct? 

QUESTION ID:34

Which of the following method(s) is/are used to estimate protein concentration? 

QUESTION ID:35

Which of the following is/are example(s) of a lotic ecosystem? 

QUESTION ID:36

Which of the following statement(s) about the effect of genetic drift is/are correct? 

QUESTION ID:37

Which of the following technique(s) can be used to determine the threedimensional structure of an organic compound? 

QUESTION ID:38

Which of the following entity(ies) is/are found inside the intact nucleus of eukaryotic cells? 

QUESTION ID:39

Which of the following is/are trace element(s)? 

QUESTION ID:40

Which of the following is/are true about Retrovirus? 

QUESTION ID:41

A wooden plant accumulates 10 𝑚𝑔 𝑘𝑔⁻¹ of ¹⁴C during its life span. A fossil of this plant was discovered and contains 2.5 𝑚𝑔 𝑘𝑔⁻¹ of ¹⁴C. The age of this fossil at the time of discovery is __________ years (rounded off to the nearest integer). (Use 5730 years as half-life of ¹⁴C)

QUESTION ID:42

A cylinder contains 50 𝐿 of an ideal gas at a pressure of 50 𝑎𝑡𝑚. Assuming that the temperature remains unchanged, the volume of the gas at 1 𝑎𝑡𝑚 is __________ 𝐿 (rounded off to the nearest integer).

QUESTION ID:43

One molecule of the protein myoglobin contains one atom of iron. A myoglobin sample was found to contain 0.34% iron. The molecular weight of myoglobin is __________ 𝑔 𝑚𝑜𝑙⁻¹ (rounded off to the nearest integer). (Use 55.9 𝑔 𝑚𝑜𝑙⁻¹ as atomic mass of iron)

QUESTION ID:44

The wavelength of visible light for the green color is 600 𝑛𝑚. The energy of photons of this color is __________ 𝑒𝑉 (rounded off to one decimal place). (Planck’s constant = 6.63 × 10⁻³⁴ 𝐽𝑠, 1 𝑒𝑉 = 1.6 × 10⁻¹⁹ 𝐽, speed of light = 3 × 10⁸ 𝑚𝑠⁻¹ )

QUESTION ID:45

A ball dropped from a bridge hits the surface of the water in 3 𝑠. The height of the bridge, ignoring air resistance, is __________ 𝑚 (rounded off to one decimal place). (Use 𝑔 = 9.8 𝑚𝑠⁻² )

QUESTION ID:46

For a given square, if the area of its incircle is 100 𝑐𝑚² , then the area of its circumcircle is __________ 𝑐𝑚² (rounded off to the nearest integer).

QUESTION ID:47

The number of peaks in the ¹H NMR spectrum of methoxymethane (𝐶𝐻₃𝑂𝐶𝐻₃) is __________.

QUESTION ID:48

The amount of agarose required to prepare 250 𝑚𝐿 of 0.8% agarose gel is __________ 𝑔𝑟𝑎𝑚𝑠 (rounded off to the nearest integer).

QUESTION ID:49

Three genes x, y, and z are located on a chromosome in a linear order. If the recombination frequencies between x and y is 0.15, and between y and z is 0.10, then the expected frequency of double crossovers is __________ (rounded off to three decimal places). 

QUESTION ID:50

A bacterial cell suspension contains 2 x 10⁵ 𝑐𝑒𝑙𝑙𝑠 𝑚𝐿⁻¹ . The volume of this suspension required to obtain 1.4 x 10⁶ 𝑐𝑒𝑙𝑙𝑠 is __________ 𝑚𝐿 (rounded off to the nearest integer).

QUESTION ID:51

The data provided in the table were obtained from the following reaction, carried out at 273 𝐾.

A + B → C

The order of the reaction with respect to 𝐴 is __________.

QUESTION ID:52

Ammonia is synthesized in the Haber process in the following reaction.

 𝑁₂ (𝑔) + 3𝐻₂ (𝑔) → 2𝑁𝐻₃(𝑔)

The temperature above which the reaction becomes spontaneous is __________ 𝐾 (rounded off to one decimal place). (∆𝐻 ⁰ = −92.2 𝑘𝐽, ∆𝑆 ⁰ = −199 𝐽𝐾 ⁻¹ )

QUESTION ID:53

In the given molecule,

the number of chiral centers is __________. 

QUESTION ID:54

Two resistors 2 Ω and 4 Ω are combined in parallel. If this combination is connected to a battery of 16 𝑉, the maximum current that can be drawn from the battery is __________ 𝐴 (rounded off to the nearest integer).

QUESTION ID:55

A box of mass 20 𝑘𝑔 is pulled at constant speed across a floor by a rope. The rope makes an angle of 45° with the horizontal. Assuming that friction is negligible, the work done in pulling the box by a distance of 20 𝑚 is __________ 𝐽 (rounded off to the nearest integer). (Use 𝑔 = 9.8 𝑚𝑠⁻² )

QUESTION ID:56

Consider an enzyme that follows simple Michaelis-Menten kinetics, and has a 𝐾_𝑀 of 5 µ𝑀. The initial velocity of the reaction will be 10% of the maximum velocity at a substrate concentration of __________ µ𝑀 (rounded off to two decimal places).

QUESTION ID:57

The value of is __________(rounded off to the nearest integer).

QUESTION ID:58

A population of 1000 plants are in Hardy-Weinberg equilibrium. Two alleles R and r determine a particular trait in this population. If the number of plants with RR genotype is 640, Rr genotype is 320 and rr genotype is 40, the frequency of r allele (in percentage) in this population is __________ (rounded off to the nearest integer).

QUESTION ID:59

If a fair coin is tossed two times, the probability that the first or the second toss will be heads is __________ (rounded off to two decimal places).

QUESTION ID:60

The restriction map of a circular plasmid is shown below, along with the indicated distances between the restriction sites.

The plasmid was completely digested with EcoRI, and XhoI. The products were analysed by agarose gel electrophoresis followed by ethidium bromide staining. The number of bands that will be visible in the gel when exposed to UV light is __________.