Operon Practice

what is an operon?

• a part of a ribsome
• a part of a Rna
• a unit made up of linked genes that code for proteins needed to do a specific task
• needed for dna replication

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

The lac operon genes only become expressed if:

• lactose binds to the repressor
• glucose binds to the repressor
• lactose binds to the operator
• the repressor binds to the operator

Inducible negative control is when when the gene is transcribed by the ____ of a specific molecule

• presence
• absence

Repressible negative control is when when the gene is transcribed by the ____ of a specific molecule

• presence
• absence

What type of operon is the trp (tryptophan) operon?

• inducible
• repressible
• positive control
• promoible

What does a promoter do?

• it allows a gene to be transcribed
• it creates a DNA segment
• it is another word for ribosomes
• it is another word for RNA

Tags

NGSS.HS-LS1-1

What is 5 in the diagram?

• RNA polymerase

• Inducer

• Repressor

• Operator

What is 4 in the diagram?

• RNA polymerase

• Inducer

• Repressor

• Operator