List of top Biological Science Questions asked in IIT JAM BL

Which of the following disorders in humans is/are due to a defect/deficiency in enzymes involved in the urea cycle?
Ricin, a protein from castor beans, causes toxicity in humans by
During photosynthesis in higher plants, oxygen is produced
The value of the integral \( \int_0^\infty e^{-y} \, dy \) is equal to ......... (round off to 2 decimal places)
A typical \( \alpha \)-helix in a native polypeptide chain has
The function \( f(x) = x^2 - 6x + 8 \) is positive when
Which of the following coenzymes is/are present in the pyruvate dehydrogenase complex?
Insulin action on a target cell causes an increase in
In this system of two reactions, \( A \to 2B \) and \( B \to 2C \), which of the following statements is/are TRUE at steady-state?
Which one of the following statements is TRUE about flagella?
Caffeine is a plant-based drug that
2,4-Dinitrophenol (DNP) is an uncoupler that
Which one of the following statements is INCORRECT about the prokaryotic and eukaryotic organisms on the Earth?
Which is the CORRECT chronological order, from the least recent to the most recent, of the four evolutionary events listed below?
P. Earliest evidence of terrestrial arthropods
Q. Appearance of Ediacaran fauna
R. Extinction of the large, non-flying dinosaurs
S. Origin of mammals
Which of the following changes would cause a shift in the membrane potential of a neuronal cell from -70 mV to -50 mV?
A photosynthetic algal filament is illuminated with white light that has passed through a prism such that the left and the right ends of the filament receive violet and red lights, respectively. The amount of oxygen released by this filament will be
Which one of the following statements is TRUE for dynein and kinesin family of motor proteins?
Which one of the following statements is INCORRECT for competitive inhibition in an enzyme catalysed reaction?
If a fossil that has been discovered recently contains 0.2% of the \(^{14}C\) (t₁/₂ = 5,730 years) that was present when the fossil was formed, then the age of the fossil in years is likely to fall in the range of
In a human cell, \( \beta \)-oxidation of a saturated fatty acyl CoA molecule produced 8 acetyl CoA, 7 H₂O and 28 ATP. The oxidised fatty acyl CoA is
Which one of the following is TRUE for the function \( y = x^2 + 1 \)?
If y = x², then dx/dy is
In rearrangement of immunoglobulin heavy chain, N-nucleotides
Naive T lymphocytes can be stimulated by the activated dendritic cells that bear
The molecular weight (Da) of the zwitterionic form of the peptide GAGAGAGA is closest to