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:

Long-Run Equilibrium

A state in which all factors of production and markets adjust fully to any changes, resulting in a stable economic environment without excess supply or demand.

Long-Run Equilibrium

A state in which all inputs and outputs in a market are fully adjusted and there is no tendency for change, often associated with perfect competition markets.

Marginal Revenue

The extra revenue obtained by selling an additional unit of a product or service.

Marginal Cost

The cost increase from producing a further unit of a product or service.