Discussion
Home ‣ Biochemistry ‣ FT IR Spectroscopy Comments
- Question
What is meant by rotating frame of reference?
Options- A. That the sample is spun rapidly in the applied field
- B. If the laboratory itself is imagined to be rotated at the Larmor frequency, viewing that individual magnetic moment vectors are fixed in space
- C. That the detector rotates around the sample
- D. None of the above
- Correct Answer
- If the laboratory itself is imagined to be rotated at the Larmor frequency, viewing that individual magnetic moment vectors are fixed in space
- 1. In immunofluroscence microscopy, fluroscent compounds are attached to
Options- A. an antibody specific for the subcellular structure
- B. an antigen specific for the subcellular structure
- C. bound antibody specific for the subcellular structure
- D. none of these Discuss
- 2. In FT-NMR, how are nuclei excited?
Options- A. By radio-frequency radiation whose frequency is swept across a predetermined range
- B. By an intense pulse of radiation which contains a wide range of frequencies
- C. By an intense pressure
- D. None of the above Discuss
- 3. How many possible orientations do spin 1/2 nuclei have when they are located in an applied magnetic field?
Options- A. 2
- B. 4
- C. 3
- D. 6 Discuss
- 4. In scanning electron microscopy
Options- A. a specimen is fixed and then coated with thin layer of a heavy metal
- B. a specimen is fixed and then coated with transition metal
- C. a specimen is not fixed and then coated with thin layer of a heavy metal
- D. none of the above Discuss
- 5. Negative staining is a technique used in
Options- A. electron microscopy
- B. gel electrophoresis
- C. immunocytochemistry
- D. light microscopy Discuss
- 6. The sequence of amino acids in proteins can be determined by means of
Options- A. identification of the -NH2 terminal amino acids
- B. identification of the -COOH terminal amino acids
- C. partial cleavage of the original polypeptide into smaller polypeptides
- D. all of the above Discuss
- 7. The frequency of precession, the transition frequency and the Larmor frequency are
Options- A. different terms for the same frequency
- B. same terms for the same frequency
- C. different terms for the different frequency
- D. same terms for the different frequency Discuss
- 8. What does the Michelson interferometer do?
Options- A. Split a polychromatic beam of radiation into its component wavelengths
- B. Selectively filter certain wavelengths from a beam of I.R. radiation
- C. Modulate the I.R. signal at a lower frequency, so that it can be observed by a detector
- D. none of the above Discuss
- 9. When radiation energy is absorbed by a spin 1/2 nucleus in a magnetic field, what happens?
Options- A. The processional frequency of the nucleus increases
- B. The nucleus spins faster
- C. The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field
- D. none of the above Discuss
- 10. An FT-IR instrument record a signal in the
Options- A. time domain
- B. frequency domain
- C. both (a) and (b)
- D. none of these Discuss
FT IR Spectroscopy problems
Search Results
Correct Answer: an antibody specific for the subcellular structure
Correct Answer: By radio-frequency radiation whose frequency is swept across a predetermined range
Correct Answer: 2
Correct Answer: a specimen is fixed and then coated with thin layer of a heavy metal
Correct Answer: electron microscopy
Correct Answer: all of the above
Correct Answer: different terms for the same frequency
Correct Answer: Modulate the I.R. signal at a lower frequency, so that it can be observed by a detector
Correct Answer: The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field
Correct Answer: time domain
Comments
There are no comments.More in Biochemistry:
Programming
Copyright ©CuriousTab. All rights reserved.