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Q.57 A protein has three identical sites arranged at the vertices of an equilateral triangle. If one site is filled with a dye (donor), the measured quantum yield (ϕD) is […]

Q.56 If 1000 bp of a double-helical DNA weighs 1×10−18 gm and distance between two bp is 0.34 nm, the total amount of DNA (in mg, rounded off to one […]

Q.55 DNA sample collected from an unidentified bacterial species (Y) contains 13% ofadenine. The G+C content (in percentage) of Y is ___________. DNA from bacterial species Y contains 13% adenine […]

Q.54 An enzyme (E) catalyzes the biochemical reaction A → B with kcat equal to 500 s−1. If the initial reaction velocity (V0) is 10 μM.s−1 at the total enzyme […]

Q.53 The following schematic diagram shows a chemostat with cell recycle Where F0 and Fr are the volumetric flow rates (in L.h−1) of feed and recycle streams, respectively. X1, X0 […]

Q.52 The number of different possible ways of forming five intramolecular disulfidebonds with ten cysteine residues of a protein is ___________. Number of Ways to Form Five Intramolecular Disulfide Bonds […]

Q.51 If there are three unrooted trees for four protein sequences, the number of rootedtrees for the same number of sequences is ___________. Phylogenetic Trees for Four Protein Sequences For […]

Q.50 E. coli cultivated at 298 K uptakes an uncharged compound (A) by passive diffusion. The intracellular and extracellular concentrations of A are 0.001 M and 0.1 M, respectively. If […]

Q.49 Aqueous two–phase extraction is used to recover α–amylase from a solution. Apolypropylene glycol–dextran mixture is added and the solution separates intoupper and lower phases. The partition coefficient is 4.0 […]

Q.48 E. coli is cultivated in a chemostat operated at a dilution rate of 0.2 h−1. The values of biomass yield due to oxygen consumption and the steady state biomass […]