You Are Interpreting Data on a DNA Chip or Microarray

question 90

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 phosphoenolase, a gene that is turned off by glucocorticoid treatment, but is expressed in control, untreated cells. What color should the spot representing the phosphoenolase gene be?

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

---

Definitions:

Risks Of Smoking

The potential negative health effects associated with smoking tobacco, including respiratory diseases and cancer.

Passive Smoking

Involuntary inhalation of smoke from other people's cigarettes, cigars, or pipes, which poses health risks similar to direct smoking.

Optimistic Bias

The tendency of individuals to underestimate the likelihood of encountering adverse events in their own lives as opposed to others.

Cigarette Tobacco

Dried and processed leaves of the tobacco plant that are rolled or stuffed into cigarettes for smoking.