Control of Gene Expression

What is the flow of genetic information in cells from DNA to protein? (Central Dogma)

• RNA to DNA to protein
• DNA to RNA to protein
• protein to DNA to RNA
• RNA to protein to DNA

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NGSS.HS-LS1-1

How can a person's muscle cells have the same exact DNA sequences as their nerve cells even though they 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

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NGSS.HS-LS1-1

NGSS.HS-LS1-4

Protein molecules around which DNA is tightly coiled in chromatin

• Histones
• Whey
• Casein
• Hemoglobin

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NGSS.HS-LS1-1

In eukaryotic cells, transcription cannot begin until 

• the two DNA strands have completely separated and exposed the promoter.
• several transcription factors have bound to the promoter.
• the 5' caps are removed from the mRNA.
• the DNA introns are removed from the template.

Which of the follwoing best describes the significance of the TATA box in eukaryotic promoters?

• it is the recognition site for a specific transcription factor
• it sets the reading frame of the mRNA
• it is the recognition site for ribosomal binding
• it signals the end of the nucleotide sequence of the gene

A chemical modification of DNA that does not affect the nucleotide sequence of a gene but makes that gene less likely to be expressed.

• methylation
• acetylation
• transcription
• translation

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NGSS.HS-LS3-2

The parts of a gene that do NOT code for amino acids in a protein are called

• introns
• exons
• codons
• anticodons

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

• regulator
• repressor
• activator
• corepressor

What is the correct description of eukaryotic chromosomes?

• many linear pieces of DNA in the cytoplasm

• many linear pieces of DNA in the nucleus

• one circular piece of DNA in the cytoplasm

• many circular pieces of DNA in the nucleus

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NGSS.HS-LS3-1

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