You Are Interpreting Data on a DNA Chip or Microarray

question 16

Multiple Choice

You are interpreting data on a DNA chip or microarray. You expose the chip to a mixture of two cDNA populations: one from cells that were not treated with a glucocorticoid hormone (untreated controls; labeled with a red fluorescent dye) and a population from cells that were treated with glucocorticoid hormones (glucocorticoid-treated; labeled with green fluorescent dye) . You look at a spot on the chip representing the gene for phosphofructokinase, a gene that is not affected by glucocorticoid treatment, but is instead expressed in all cells. What color should the spot representing the phosphofructokinase gene be?

• A)red
• B)green
• C)yellow
• D)no color, the spot is not labeled
• E)brown

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Definitions:

Late Binding

A programming mechanism where the method to be called is determined at runtime instead of compile time.

Private Methods

Methods that are accessible only within the class in which they are defined.

Static Methods

Functions in a class that are declared with the static modifier and can be called without creating an instance of the class.

Polymorphism

A programming concept that allows objects of different classes to be treated as objects of a common superclass.