List of top Questions asked in IIT JAM BT

Whales can dive undersea to depths of 2 km. The pressure on the whale at this depth (ignoring atmospheric pressure) is _____ $Γ— 10^6 Pa$. (Density of sea water = $1 g cm^{-3}$ and $g =10 m s^{-2}$)
Arrange the following elements in increasing order of their electronegativity according to the Pauling scale
C, Na, Be and Br
Among $i-BuNH_2, NH_3, Me_2NH, EtNH_2,$ the number of compound(s) more basic than $MeNH_2$ is/are ______.
Which of the following is/are essential feature(s) of high-fidelity DNA polymerases used in polymerase chain reaction?
Which of the following option(s) represent(s) the evolutionary relationship between the bird and bat wings as structures for flying?
Which of the following compound(s) is/are aromatic?
The order of differential equation $\frac{𝑑^3𝑦}{dx^3} + 2 \frac{𝑑^2𝑦}{dx^2} βˆ’ 3 \frac{𝑑𝑦}{dx} + 6π‘₯^4𝑦$ = 0 is _______.
In the β€˜Southern blot’ technique, which of the following reagents is used to detect the presence of a desired DNA fragment?
A genetic linkage map represents the
Class II MHC molecules are NOT expressed by
Match the microorganisms in Group I with the human disease in Group II

Group I Group II
P) Treponema pallidum 1) Sleeping sickness
Q) Trypanosoma cruzi 2) Whooping cough
R) Trypanosoma gambiense3) Chagas disease
S) Bordetella pertussis 4) Syphilis
The value of $\lim_{π‘₯β†’βˆ’3}\frac{(2π‘₯+6)}{(π‘₯+3)}$ is
A growing shoot of a germinating seedling encounters an underground obstacle. Which one of the following hormones elicits β€˜triple response’ to the underground obstacle?
Match the molecules in Group I with the type of bonds present in them, in Group II
Group I Group II
P) NaCl 1) Coordination bond
Q) $H_2$2) Polar covalent bond
R) $Pd-P$ bond in $Pd(PPh_3)_4 3) Covalent bond
S) $C-Cl$ bond in $CH_3Cl $ 4) Ionic bond
Match the recombinant DNA products in Group I with its application in Group II
Group I Group II
P) Tissue plasminogen activator1) Emergency treatment of heart attack
Q) Erythropoietin 2) Treatment of anemia
R) Superoxide dismutase 3) Prevents tissue damage
S) Interferon4) Stimulates cells to inhibit viral replication
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 _____.
Match the type of DNA repair mechanism in Group I with the enzyme(s) involved in Group II
Group I Group II
P) Mismatch repair1) DNA glycosylase
Q) Base excision repair2) UvrA, UvrB, UvrC and UvrD
R) Nucleotide excision repair3) RecA
S) Double strand break repair4) MutL, MutS and MutH
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
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?
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.
Restriction enzymes that recognize the same nucleotide sequence but cleave at different positions are called
The relationship between birth weight and degree of survival $ (log \frac{ π‘ π‘’π‘Ÿπ‘£π‘–π‘£π‘œπ‘Ÿπ‘  }{ π‘›π‘œπ‘›βˆ’π‘ π‘’π‘Ÿπ‘£π‘–π‘£π‘œπ‘Ÿπ‘ })$ in 6908 human births in an obstetric hospital is shown in the figure below. The mode of selection for birth weight is
The relationship between birth weight and degree of survival $ (log \frac{ π‘ π‘’π‘Ÿπ‘£π‘–π‘£π‘œπ‘Ÿπ‘  }{ π‘›π‘œπ‘›βˆ’π‘ π‘’π‘Ÿπ‘£π‘–π‘£π‘œπ‘Ÿπ‘ })$ in 6908 human births in an obstetric hospital is shown in the figure below. The mode of selection for birth weight is
Tetracycline binds to the
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?
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?
The characteristic morphological change(s) in cells undergoing apoptosis is/are