List of top Questions asked in IIT JAM BT

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?
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.
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?
Hyperventilation (breathing rapidly and deeply) causes which of the following event(s) in the arterial blood?
A genetic linkage map represents the
Which of the given statement(s) about synthetic oligonucleotides is/are correct?
Class II MHC molecules are NOT expressed by
The net number of molecule(s) of NADH formed from one molecule of glucose in glycolysis under aerobic conditions is/are _______.
Which one of the following enzymes is required to ensure the replication of a negative-sense or negative-strand RNA virus?
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 _____.
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
Among $i-BuNH_2, NH_3, Me_2NH, EtNH_2,$ the number of compound(s) more basic than $MeNH_2$ is/are ______.
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
Among $K^+, Li^+, Rb^+, Cs^+$, the number of cation(s) having ionic radii more than $Na^+$ is/are _____.
A random variable X and its probability distribution is given below. The value of P(X<5) is _______. (rounded off to one decimal place)
X012345
P(X)0K2K3K4K5K
Among the five fragments given below, <br> the number of fragment(s) accelerated to the analyzer tube in mass spectrometer with electron ionization is/are _________.
Among the five fragments given below, <br> the number of fragment(s) accelerated to the analyzer tube in mass spectrometer with electron ionization is/are _________.
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).
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 _________ $N m^{-1}$. ($Use g=10 m s^{-2}$)
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 $g =10 m s^{-2}$)
A protein solution of 1 Β΅M 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)
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 _______.
If a bacterial culture with a doubling time of 30 minutes starts with two cells, then the number of cells after 4 hours are _______.
The value of $\lim_{π‘₯β†’βˆ’3}\frac{(2π‘₯+6)}{(π‘₯+3)}$ is
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.
The βˆ†GΒ΄ and $KΒ΄_{eq}$ values of ATP hydrolysis are -32.34 kJ $mol^{-1}$ and $4.6 x10^5$, respectively. The βˆ†GΒ΄ and $KΒ΄_{eq}$ values of enzymatic hydrolysis of glucose-6- phosphate to glucose and phosphate are $-13.18 kJ mol^{-1}$ and 203.8, respectively. The βˆ†GΒ΄ 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 Β°C].