Lactose Operon

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

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

• prokaryotes (bacteria)
• eukaryotes (plant and animals)
• animals only
• viruses

In the lac operon the inducer is

• allolactose

• glucose

• galactose

• all of the above

What is 1 in the diagram?

• RNA polymerase

• Inducer

• Repressor

• Operator

What is 2 in the diagram?

• RNA polymerase

• Inducer

• Repressor

• Operator

What is 4 in the diagram?

• RNA polymerase

• Inducer

• Repressor

• Operator

What is 5 in the diagram?

• RNA polymerase

• Inducer

• Repressor

• Operator

In the top picture the operon is

• on

• off

Tags

NGSS.HS-LS3-2

In the bottom picture the operon is

• on

• off