Lac and Trp Operon

What types of cells have operons? 

• Eukaryotes

• Prokaryotes

• Neither eukaryotes nor prokaryotes

• Both eukaryotes and prokaryotes

What binds to the promoter?

• DNA polymerase

• Operator

• Repressor

• RNA polymerase

Where does the repressor in an operon bind?

• Operator

• Promoter

• Regulatory sequence

• TATA box

If the repressor is bound to the operator…

• RNA polymerase is able to bind, the operon is off

• RNA polymerase is able to bind, the operon is on

• RNA polymerase is unable to bind, the operon is off

• RNA polymerase is unable to bind, the operon is on

Operons are found in which of the following organisms?

• Bacteria(prokaryotes)

• plants and animals(eukaryotes)

• only animals

• virsuses

An operon consists of all the the following EXCEPT

• operator

• promoter

• regulatory gene

• genes of the operon

The lac operon is…

• Inducible operon so starts off and is activated by lactose

• Inducible operon so starts on and is deactivated by lactose

• Repressible operon so starts off and is activated by lactose

• Repressible operon so starts on and is deactivated by lactose

The trp operon is a(n)…

• Inducible operon – activated by trp

• Inducible operon – deactivated by trp

• Repressible operon – activated by trp

• Repressible operon – deactivated by trp

What is 1 in the diagram?

• RNA polymerase

• Inducer

• Repressor

• Operator

What is 4 in the diagram?

• RNA polymerase

• Inducer

• Repressor

• Operator