If You Wanted to Block Transcription of a Group of Functionally

question 61

Multiple Choice

If you wanted to block transcription of a group of functionally related genes in a prokaryote,you could place an obstacle

• A)upstream of both the promoter and operon.
• B)downstream of both the promoter and operon.
• C)place an obstacle downstream of the promoter,but upstream of the operon.
• D)place an obstacle upstream of the promoter,but downstream of the operon.

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Definitions:

Charles Sumner

An American politician and senator known for his strong stance against slavery and his leadership in the anti-slavery movement before the Civil War.

Preston Brooks

A pro-slavery Congressman from South Carolina known for his violent attack on abolitionist Senator Charles Sumner in 1856.

Dred Scott Decision

A landmark 1857 Supreme Court case that held African Americans, whether enslaved or free, could not be American citizens and therefore had no standing to sue in federal court, and that the federal government had no power to regulate slavery in the federal territories acquired after the creation of the United States.