Genes and Gene Expression

What is a Gene?

• A segment of RNA that codes for a protein
• A chromosome
• A segment of DNA that codes for a protein
• Your genome

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NGSS.HS-LS1-1

____ is the activation of a gene that results in transcription.

• Gene expression
• Gene technology
• Eukaryotic expression
• Prokaryotic expression

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NGSS.HS-LS1-1

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

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

• promoter
• repressor
• operator
• gene

Which molecule can we find the promoter and terminator in?

• DNA
• mRNA
• tRNA
• polypeptide chain

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

• regulator
• repressor
• activator
• corepressor

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

• corepressor
• inducer
• promoter
• operator

How can a person's muscle cells have the same exact DNA sequences as their nerve cells even though the look and perform completely different?

• The two different cells become mutated
• The proteins expressed in each cell are different
• They actually have different DNA in the two types of cells.
• The genome of the different cells changes

Tags

NGSS.HS-LS1-1

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