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35. Which of the following molecular genetic technique(s) is/are used in forensic science?  (A) Coimmunoprecipitation (B) DNA fingerprinting (C) Restriction   fragment   length polymorphism (D) Electrophoretic mobility shift assay Which Molecular […]

34. In circular dichroism (CD) spectroscopy, the difference in molar extinction coefficients (Δε) is plotted as a function of wavelength λ (in nm). In a CD spectrum of an alpha-helical […]

33. A solution containing NAD+ and NADH has an optical density of 0.233 at 340 nm and 1.000 at 260 nm. While this solution absorbs at 260 nm, NADH alone […]

32. The number of peaks in the 13C-NMR spectrum of CDCl3 is Number of Peaks in the ¹³C NMR Spectrum of CDCl₃ The correct answer is 3 peaks. The number […]

31. Among the following compounds, which of these will show two singlets in their 1H-NMR spectrum? (A) 1,4-Dichlorobenzene (B) 1,2-Dichlorobenzene (C) Dimethoxymethane (D) Methylacetate Which Compounds Show Two Singlets in […]

30. The number of signals in 13C NMR for the following structure is ______. Number of Signals in ¹³C NMR for the Given Fused Tricyclic Structure The correct answer is […]

29. In the 1H NMR spectrum of 1-bromopropane (structure shown below), which of the following statements are CORRECT?        (A) Protons ‘a’ resonate upfield to protons ‘c’ (B) […]

28. 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 S0 is phosphorescence (C) […]

27. In 2NH2SO4, an organic compound shows fluorescence with quantum yield, Φf = 0.42 and fluorescence rate constant, kf = 5.25 × 107s-1. The observed fluorescence life time of it […]

26. Which of the following statements is/are CORRECT? (A) Absorption occurs at all wavelengths if light passes through a given solution. (B) The efficiency of a photochemical process is often […]