Would You Expect the Number of Virions to Be the Same

question 81

Multiple Choice

Would you expect the number of virions to be the same if you measured them by the plaque assay or by counting using the electron microscope? Why?

• A)Yes-both methods measure the total number of virus particles in a solution.
• B)No-the plaque assay only measures viable virus particles,while the electron microscope cannot distinguish between defective and viable virus.
• C)No-you cannot count virus particles by using a plaque assay.You can only get a relative difference in quantity from one preparation of virus particles to another with this method.
• D)Yes-only fully functioning viruses will be released from a host cell,so the quantified number of virus particles in a plaque assay should be identical to the number of free virus particles counted by electron microscopy within a given preparation.

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Definitions:

Competitive Firm

A company that operates in a market with many buyers and sellers, where no single entity has the power to dictate prices for goods and services.

Production Function

An economic model that describes the relationship between input resources and the output of goods for a specific period.

Short-Run Cost Function

A representation of how total production costs change with output levels in the short term, when some factors are fixed.

Quasi-Fixed Costs

Costs that are not directly variable with the level of output but can change over time with scale of operations, such as salaries for permanent staff.