Inducible Operon

In a catabolic pathway, an operon causes transcription of the genes controlling a group of enzymes.

• inducible operon

• repressible operon

• intron

• exon

Operons are found in the cells of which of the following types of organisms?

• prokaryotes

• eukaryotes

• animals only

• viruses

The "on/off" switch for an operon is called the

• promoter

• enhancer

• operator

• gene

Group of structural and regulating genes that function as a single unit.

• operon

• promoter

• activator

• inducer

Genes grouped together with a related function is called a/an ______.

• operon

• promotor

• operator

• repressor protein

A protein that binds to the operator and blocks the RNA polymerase

• regulator

• repressor

• activator

• corepressor

The "on/off" switch for an operon is called the

• promoter

• repressor

• operator

• gene

What is 2 in the diagram?

• RNA polymerase

• Inducer

• Repressor

• Operator

Which of the following best describes an inducible operon?

• A set of genes that are expressed only when an inducer is present

• A set of genes that are always expressed

• A set of genes that are never expressed

• A set of genes that are expressed only in the presence of a repressor

In the lac operon, what role does lactose play?

• Repressor

• Inducer

• Activator

• Promoter