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

NGSS.HS-LS1-4

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

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

• promoter
• repressor
• operator
• gene

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

Epigenetics modulates genetic expression:

• differently in each cell in the body.

• by altering the genome.

• in response to only intracellular processes.

• consistently throughout an individual's life.

Translation is a process where:

• a polypeptide sequence is produced from a sequence of rRNA codons.

• a polypeptide sequence is produced from a sequence of tRNA codons.

• a polypeptide sequence is produced from a sequence of mRNA codons.

• a DNA nucleotide sequence is used to produce mRNA codon sequence.

Transcription factors are produced by:

• coding DNA.

• structural genes.

• non-coding DNA and structural genes.

• non-coding DNA.

Tags

NGSS.HS-LS1-1

A traumatic event experienced by an organism can affect the health of its children and grandchildren. This can happen through inherited:

• epigenetic tags.

• polypetide chains.

• transcription factors.

• DNA nucleotide patterns.

Tags

NGSS.HS-LS3-2

Which factor can affect the epigenome?

• nutrition
• exercise
• stress 
• all of these factors can affect the epigenome

Tags

NGSS.HS-LS3-2

A lack of this nonprotein molecule would result in the inability of the cell to "turn off" genes:

• Operon

• Inducer

• Promoter

• Repressor

• Corepressor