The Central American Civil Wars Led to the Mass Emigration

question 18

Multiple Choice

The Central American civil wars led to the mass emigration of Guatemalan Mayato the United States. Approximately how many are estimated to have sought refuge in the U.S.?

• A) more than 1 million
• B) more than 3 million
• C) more than 2 million
• D) less than 1 million

---

Definitions:

Tryptophan Operon

A cluster of genes in bacteria involved in the production of the amino acid tryptophan, regulated by feedback inhibition.

Repressor Gene

A gene that encodes a protein which can bind to an operator or promoter sequences to prevent transcription of a certain gene.

Promoter

A region of DNA that initiates transcription of a particular gene, playing a crucial role in regulating gene expression.

Operator

A segment of DNA to which a repressor protein binds, regulating the expression of genes by blocking the attachment of RNA polymerase to the promoter region.