In Vertebrates,the Family of Myogenic Regulatory Factors (MRFs)plays a Major

question 12

Multiple Choice

In vertebrates,the family of myogenic regulatory factors (MRFs) plays a major role in muscle development.This family consists of four related genes which have distinct but overlapping functions.This gene family is represented by only a single gene in Drosophila,called nautilus.You want to know whether nautilus plays a role like all of the MRFs put together,or more like one in particular.What is a quick and easy way to begin to address this question?

• A)Compare the DNA and protein sequences of all the genes to determine if nautilus is more similar to one MRF than another.
• B)Use a DNA microarray to compare gene activation patterns between nautilus and the MRFs.
• C)Compare the proteome of a cell expressing nautilus to the those of cells expressing each of the MRFs in turn.
• D)Generate four transgenic Drosophila strains that express the MRFs in a mutant nautilus background.

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Competitive Firm

A business that operates in a market where it must compete against other firms for customers and resources.

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The difference between a firm's total revenues and its total costs, including both explicit and implicit costs, representing the additional gain above the next best alternative investment.

Marginal Revenue

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The process of making business decisions that increase a firm's earnings to its highest possible level.