Regulation of Gene Expression

Regulation of Gene Expression

Multiple Choice

What is a eukaryote?

• An enzyme

• a promoter protein

• a cell with a nucleus

• a gene setion

Multiple Choice

What is a prokaryote

• an amino acid

• a inhibitor protein

• a cell with no nucleus

• an enzyme

Multiple Choice

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

Multiple Choice

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

• promoter
• repressor
• operator
• gene

Multiple Choice

Gene regulation is the process that is used to:

• help make sugars for cells in plants.

• make glycosomes in cells.

• turning genes on and off.

• Not sure, need help.

Multiple Choice

What is a gene?

• A segment of RNA that encodes for a protein

• The portion of the chromosome that does not get transcribed

• A segment of DNA that encodes for a protein

• The collection of your chromosomes

Multiple Choice

Regulatory __________ attach to the regulatory ____________

• proteins, body

• sequences, proteins

• proteins, sequence

• codons, anticodons

Multiple Choice

In eukaryotes, proteins that help the RNA polymerase bind to the regulatory region for transcription are called ____________.

• transcription factors

• topoisomerase

• regulatory genes

• activators

Multiple Choice

In eukaryotes, proteins that help the RNA polymerase bind to the regulatory region for transcription are called ____________.

• transcription factors

• topoisomerase

• regulatory genes

• activators

Multiple Choice

Regulatory proteins (transcription factors) may

• encourage transcription

• prevent transcription

• stop transcription once its started

• either encourage or prevent transcription

Multiple Choice

What is the role of operons in prokaryote gene expression?

• It makes the genes prokaryotes be turned on
• It accounts for the regulation of gene activity in response to the needs of the cells
• To make DNA for the gene
• To make the gene turn of and off

Multiple Choice

What is the name of the stretch of DNA where RNA polymerase binds?

• operator

• promoter

• enhancer

• regulatory gene

Multiple Choice

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

• regulator
• repressor
• activator
• corepressor

Multiple Choice

What does a promoter do?

• binds RNA polymerase for transcription

• binds DNA polymerase for replication

• binds the operator

• binds the repressor

Multiple Choice

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

• promoter
• repressor
• operator
• gene

Multiple Choice

What does the lactose do to the Operon?

• Blocks transcription of the lactase gene by cutting up the DNA

• Binds to the repressor preventing it from attaching to the operator

• The lactose binds promoter to prevent transcription

• Allows for the transcription rate of lactase to slow down

Multiple Choice

What does the lactose do to the Operon?

• Blocks transcription of the lactase gene by cutting up the DNA

• Binds to the repressor preventing it from attaching to the operator

• The lactose binds promoter to prevent transcription

• Allows for the transcription rate of lactase to slow down

Multiple Choice

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

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

Multiple Choice

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

Multiple Choice

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