List of practice Questions

Metabolic intermediates provide the backbone for the synthesis of amino acids. Match the metabolic intermediates listed in Column I with their corresponding amino acids given in Column II. \[ \begin{array}{|c|c|} \hline \textbf{Column I} & \textbf{Column II} \\ \hline P. \, (\alpha)-\text{Ketoglutarate} & ii. \, \text{Glutamate} \\ \hline Q. \, \text{Ribose 5-phosphate} & i. \, \text{Histidine} \\ \hline R. \, \text{3-Phosphoglycerate} & v. \, \text{Serine} \\ \hline S. \, \text{Phosphoenolpyruvate} & iii. \, \text{Aspartate} \\ \hline \end{array} \]
If a 10 mM solution of a biomolecule in a cuvette of path length 10 mm absorbs 90% of the incident light at 280 nm, the molar extinction coefficient of the biomolecule at this wavelength is _______ M(^{-1})cm(^{-1}). (Round off to two decimal places)
In a lactic acid solution at pH 4.8, the concentrations of lactic acid and lactate are 0.01 M and 0.087 M, respectively. The calculated pKa of lactic acid is _______. (Round off to one decimal place)
A newly identified viral protein contains one long α-helix spanning 60 amino acid residues. The number of main chain H-bonds formed in this helix is _______. (Answer in integer)
Which one or more of the following statements correctly describe(s) the addition of N-nucleotides during the rearrangement of the immunoglobulin heavy chain-encoding gene?
Given the standard reduction potentials \((E^\Theta)\) for the half-cell reactions below, the standard Gibbs free energy of the dissolution of silver chloride in water, at 298 K, is ---- J mol\(^{-1}\) (rounded off to the nearest integer).

\[ \text{(Given: Faraday constant, } F = 96500 \text{ C mol}^{-1}; \quad J = C \times V) \]

The standard reduction half-cell reactions are:

\[ \text{AgCl(s) + e}^- \rightarrow \text{Ag(s) + Cl}^-(\text{aq}); \quad E^\Theta = 0.22 \text{ V at 298 K} \] \[ \text{Ag}^+(\text{aq}) + e^- \rightarrow \text{Ag(s)}; \quad E^\Theta = 0.80 \text{ V at 298 K} \]
The ionic product of water at \(40^\circ \mathrm{C}\) is \(2.92 \times 10^{-14} \, \mathrm{M}^2\). The pH of water at \(40^\circ \mathrm{C}\) is _______ (rounded off to 2 decimal places).
The molecule(s) with non-zero dipole moment is/are:
The paramagnetic species among the following is/are (Given: Atomic numbers of Cr = 24; Fe = 26; Ni = 28):
Upon addition of compound ( X ) to an aqueous AgNO(_3) solution, a white precipitate appears instantly. Also, ( X ) does not exhibit geometrical isomerism. The CORRECT option(s) for ( X ) is/are:
Which one among the following structures is the most stable conformer of (Z)-pent-2-ene?
An enzyme-catalyzed conversion of a substrate at 298 K proceeds by a Michaelis-Menten mechanism. The Lineweaver-Burk plot for the analysis of the experimental data has an intercept along the ( y )-axis of ( 0.357 , {mmol}^{-1} , {dm}^{3} , {s} ) and a slope of ( 2.10 , {s} ). The CORRECT Michaelis constant for the reaction is------- (rounded off to 2 decimal places):

Each of the following alkenes undergoes addition reaction with bromine. Under the same reaction conditions, the CORRECT trend in the reaction rates is: 
 

The initial rate of a reaction triples when the concentration of a reactant, ( A ), is doubled. The order of the reaction with respect to ( A ) is _______ (rounded off to 2 decimal places).
One mole of an ideal gas expands isothermally and reversibly to double its volume. If the expansion work done by the system is 1728.85 J, the temperature of the system is _______ K (rounded off to 2 decimal places).
The maximum number of electrons that can be accommodated in the shell with ( n = 2 ) is _______ (in integer). (Given: ( n ) = principal quantum number)

The CORRECT option(s) of ( Y ) for the following reaction is/are: 

The molecules A and B are a pair of ": 
 

The CORRECT order of acidity of the following compounds is: 
 

Among the following, the structure representing histidine is:
Which one of the following is the CORRECT representation of the variation of the Gibbs free energy (( G )) of a substance with temperature (( T )) at constant pressure?
The CORRECT order of electronegativity is:

In the (4 times 4) array shown below, each cell of the first three rows has either a cross (X) or a number. The number in a cell represents the count of the immediate neighboring cells (left, right, top, bottom, diagonals) NOT having a cross (X). Given that the last row has no crosses (X), the sum of the four numbers to be filled in the last row is: 

The pie charts depict the shares of various power generation technologies in the total electricity generation of a country for the years 2007 and 2023. 
 


The renewable sources of electricity generation consist of Hydro, Solar, and Wind. Assuming that the total electricity generated remains the same from 2007 to 2023, what is the percentage increase in the share of the renewable sources of electricity generation over this period?}

A person sold two different items at the same price. He made 10% profit in one item, and 10% loss in the other item. In selling these two items, the person made a total of: