AP Biology Gene Expression

Which molecule can we find the promoter and terminator in?

• DNA
• mRNA
• tRNA
• polypeptide chain

A small molecule that binds to the repressor protein and makes it inactive is a/an ________.

• corepressor
• inducer
• promoter
• operator

What does the inducer molecule do in an inducable operon?

• it binds to the repressor protein allowing transcription to occur
• it binds to the promoter allowing transcription to occur
• it binds to the operator and stops transcription
• it binds to the repressor and stops transcription

Tags

NGSS.HS-LS1-1

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

• promoter
• repressor
• operator
• gene

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

• regulator
• repressor
• activator
• corepressor

What is the name of the binding site of RNA polymerase in eukaryotes?

• operator
• operon
• inducer
• promoter

What does the repressor protein do?

• Allows RNA polymerase to read the gene
• Prevents RNA polymerase from reading the gene
• Reads the gene
• Translates the gene

Which type of operon is shown in the image?

• inducible operon
• repressible operon
• positive control operon
• can't determine this from the image

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

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

What is an operon?

• a part of the promoter region of a gene
• a part of RNA polymerase
• a unit made up of linked genes that code for proteins needed to do a specific task
• A protein needed for DNA replication