REPORTING - GUIDE QUESTIONS

ULTRACENTRIFUGATION

1. These are two kinds of ultracentrifuges:
a. preparative and analytical ultracentrifuge
b. post-operative and pre-analytical ultracentrifuge
c. post-analytical and post-operative ultracentrifuge
d. none of the above

2. It is the unit used in ultracentrifugation:
a. Dalton’s unit
b. Svedberg’s unit
c. Newton’s unit
d. None of the above

3. The following are the rotors used in ultracentrifugation , EXCEPT:
a. zonal rotors
b. fixed angle rotors
c. swaying bucket rotors
d. none of the above

4. The following are the instruments used in turbidimetric measurements, EXCEPT:
a. ultracentrifuge
b. colorimeter
c. spectrophotometer
d. none of the above

5. In turbidimetry, the amount of light blocked by a suspension of particles depends not only on the concentration of the analyte but also in:
a. angle
b. size
c. wavelength
d. none of the above

6. It is the measurement of the amount of light scattered from the unknown solution :
a. ultracentrifugation
b. turbidimetry
c. nephelometry
d. none of the above

7. The range of angle used in nephelometry is:
a. 70 oC to 90oC
b. 90 oC to 180 oC
c. 70 oC to 180 oC
d. none of the above

8. It measures the amount of light blocked by particulate matter as light passes through the cuvette:
a. nephelometry
b. turbidimetry
c. ultracentrifugation
d. all of the above

9. Factors affecting nephelometry includes the following intrinsic factors , EXCEPT:
a. wavelength
b. size of the particle
c. incident light source, sample and photodetecting system must be at right angles to
each other
d. None of the above

10. Nephelometric measurements are similar to turbidimetric measurements :
a. true
b. false

ANSWERS:

1. A
2. B
3. C
4. A
5. B
6. C
7. A
8. B
9. C
10. A