Each of the Following May Be Used to Estimate the Molecular

question 161

Multiple Choice

Each of the following may be used to estimate the molecular weight of a protein EXCEPT

• A) sucrose density gradient centrifugation.
• B) ion exchange chromatography.
• C) SDS (sodium dodecyl sulfate) gel electrophoresis.
• D) gel filtration chromatography.
• E) sedimentation and diffusion measurements.

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Definitions:

Cumulative Frequency

The running total of frequencies up to a certain point in a set of data.

Total Number

The cumulative count of all elements or instances within a specific set or collection.

Upper Class Limits

The maximum value within a class interval in a frequency distribution, where classes are used to group data.

Class Width

In statistics, the difference between the upper and lower boundaries of a class interval in a frequency distribution.