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Q.48 The number of signals in 13C NMR for the following structure is _____ . The correct number of signals in the 1313C NMR spectrum of the given tricyclic cyclohexane system […]

Q.47 A jet plane lands on an aircraft carrier at 70 m/s and stops in 3 seconds. Assuming that the acceleration is constant, the jet plane travels a distance of […]

Q.46 In Young’s double slit experiment, the slits are separated by a distance of 0.05 mm and the source emits light of two wavelengths 450 and 520 nm. If the […]

Q.45 The plane x + y + z = 0 intersects the sphere x2 + y2 + z2 = 9 along a circle. If (2, y, z) is a point […]

Q.44 A receptor binds to its ligand with a dissociation constant Kd = 10−8 M. The concentration of the ligand required to occupy 10% of the receptors would be 10−x […]

Q.43 A population is in Hardy–Weinberg equilibrium for a gene with only two alleles (“A”and “a”). If the gene frequency of the allele “A” is 0.7, genotype frequency ofheterozygous “Aa” […]

Q.42 A 152 nm long Watson–Crick double helical DNA (B–DNA) will contain _____ turns. A 152 nm long Watson-Crick double helical B-DNA contains 45 turns. This calculation uses standard structural parameters […]

Q.41 The net charge on the following peptide at pH 7.0 is _____ .Val-Asp-Asn-Lys-Ser-Ile The net charge on the peptide Val-Asp-Asn-Lys-Ser-Ile at pH 7.0 is +1. The net charge on peptide […]

Q.40 In the 1H NMR spectrum of 1–bromopropane (structure shown below), which of thefollowing statements are CORRECT?CH2 CH2 CH3cbaBr(A) Protons ‘a’ resonate upfield to protons ‘c’(B) Protons ‘b’ resonate downfield […]

Q.39 Which of the following statements are CORRECT?(A) Fluorescence has a much longer decay period than that of phosphorescence(B) Radiative transition from T1 to S 0 is phosphorescence(C) Radiative transition […]