It Is Possible for a Repressor to Negatively Regulate the Expression

question 10

Multiple Choice

It is possible for a repressor to negatively regulate the expression of an operon because:

• A) the repressor induces the expression of the inducer by binding to the promoter that comes before the inducer gene.
• B) one of the structural genes expressed in the operon negatively regulates the repressor.
• C) the repressor-binding site overlaps the promoter site of the operon, allowing it to physically block the binding of RNA polymerase.
• D) the repressor-binding site on the DNA overlaps with the translation start site, thereby preventing the transcription.
• E) the repressor physically blocks where the activator should be binding on the operator region.

---

Definitions:

Security Market Line

A representation in financial markets of the relationship between risk and expected return, used in the Capital Asset Pricing Model.

Overpriced Security

A security trading at a price believed to be higher than its theoretical value or intrinsic worth.

Expected Market Rate

The anticipated rate of return on an investment as predicted by investors based on historical market data and trends.

Abnormal Return

Return on a stock beyond what would be predicted by market movements alone. Cumulative abnormal return (CAR) is the total abnormal return for the period surrounding an announcement or the release of information.