Home⇒ Medical Science⇒ Biochemistry⇒ Ft ir spectroscopy
| 1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
| 2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
| Q1 ⇒ In FT-NMR, how are nuclei excited? By radio-frequency radiation whose frequency is swept across a predetermined range [other wrong options] [Discuss in forum] |
| Q2 ⇒ An FT-IR instrument record a signal in the time domain [other wrong options] [Discuss in forum] |
| Q3 ⇒ In scanning electron microscopy a specimen is fixed and then coated with thin layer of a heavy metal [other wrong options] [Discuss in forum] |
| Q4 ⇒ Cytochrome C has an isoelectric pH of 10.05 [other wrong options] [Discuss in forum] |
| Q5 ⇒ Why is it advantageous to record many FID signals from the same sample and then add them together? To increase sensitivity [other wrong options] [Discuss in forum] |
| Q6 ⇒ In immunofluroscence microscopy, fluroscent compounds are attached to an antibody specific for the subcellular structure [other wrong options] [Discuss in forum] |
| Q7 ⇒ What is meant by rotating frame of reference? If the laboratory itself is imagined to be rotated at the Larmor frequency, viewing that individual magnetic moment vectors are fixed in space [other wrong options] [Discuss in forum] |
| Q8 ⇒ How do you turn a signal recorded in the time domain into a frequency domain signal? Fourier transformation [other wrong options] [Discuss in forum] |
| Q9 ⇒ What does the Michelson interferometer do? Modulate the I.R. signal at a lower frequency, so that it can be observed by a detector [other wrong options] [Discuss in forum] |
| Q10 ⇒ The sequence of amino acids in proteins can be determined by means of all of the above [other wrong options] [Discuss in forum] |
| Q11 ⇒ How many possible orientations do spin 1/2 nuclei have when they are located in an applied magnetic field? 2 [other wrong options] [Discuss in forum] |
| Q12 ⇒ What is the name given to the relaxation process due to an interaction between an excited nucleus and the magnetic fields caused by nuclei in molecules moving around in the sample? Spin - lattice relaxation [other wrong options] [Discuss in forum] |
| Q13 ⇒ When radiation energy is absorbed by a spin 1/2 nucleus in a magnetic field, what happens? The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field [other wrong options] [Discuss in forum] |
| Q14 ⇒ Which of the following is the basis of first dimension of separation for two-dimensional electrophoresis? Isoelectric point [other wrong options] [Discuss in forum] |
| Q15 ⇒ The frequency of precession, the transition frequency and the Larmor frequency are different terms for the same frequency [other wrong options] [Discuss in forum] |
| Q16 ⇒ Negative staining is a technique used in electron microscopy [other wrong options] [Discuss in forum] |