Mary Takes a Course in Which She Is Tested Every

question 90

Multiple Choice

Mary takes a course in which she is tested every two weeks. Her studying falls off right after a test, followed by a gradual increase to a rapid rate of studying as the next test approaches. Her studying conforms to the typical pattern of responding maintained on _____ schedules.

• A)fixed-ratio
• B)variable-ratio
• C)fixed-interval
• D)variable-interval

---

Definitions:

CAP

Catabolite Activator Protein, a regulatory protein in bacteria that helps facilitate the transcription of genes in response to the presence of certain sugars.

Lac Operon

A gene regulatory mechanism in bacteria that controls the metabolism of lactose.

Rate of Transcription

The speed at which RNA polymerase produces RNA molecules from a DNA template, affecting gene expression.

DNA Methylation

A biochemical process involving the addition of a methyl group to the DNA molecule, often affecting gene expression and cellular function.