Eukaryotic Gene Expression

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

If an mRNA molecule has introns and exons in it, where is it?

• At a ribosome
• In the nucleus
• In a prokaryotic cell
• could be in the nucleus or the ribosome

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

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

What is the non-coding portion of the mRNA transcript that is removed during processing?

• intron

• exon

• 5'cap

• poly-A tail

Enhancers are...

• proteins located adjacent to promoters

• distant sites where regulatory proteins bind

• expediters of RNA polymerase capture

• proteins that bind with repressors, deactivating them

• a bacterial form of promoters

Protein molecules around which DNA is tightly coiled in chromatin

• Histones
• Whey
• Casein
• Hemoglobin

Tags

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.

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

Tags

NGSS.HS-LS3-2

Which of the following is an example of post-transcriptional control of gene expression?

• the addition of methyl groups to cytosine bases of DNA
• the binding of transcription factors to a promoter
• the removal of introns and splicing together of exons
• gene amplification contributing to cancer

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

• introns
• exons
• codons
• anticodons