Gene Expresssion (AP Bio 6C)

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

All of the following are true about histone acetylation EXCEPT

• takes place on the histone
• enzymes add a acetyl group
• when it occurs, transcription is more likely to occur
• chromatin becomes more tightly packed

All the genes in both a prokaryotic cell and a eukaryotic cell are expressed at the same time.

• True

• False

In eukaryotes, DNA is tightly coiled around ____ in chromatin

• Histones

• Whey

• Casein

• Hemoglobin

The production of mature mRNA in eukaryotes involves

• cutting introns out and spicing exons together
• adding the 5' cap
• adding the 3' poly A tail
• all of these are correct

In an operon, a sequence of DNA where RNA polymerase binds prior to transcription.

• operator

• promoter

• initiator

• repressor

In an operon, the sequence of DNA that serves as a binding site for a repressor, and thereby regulates the expression of structural genes.

• promoter

• inducer

• operator

• repressor

What type of operon is the trp (tryptophan) operon?

• inducible
• repressible
• positive control
• promoible

Tags

NGSS.HS-LS1-3

An operon is

• a genetic on/off switch in prokaryotes

• a genetic on/off switch in eukaryotes

• a group of related genes and the associated gene switches in prokaryotes

• a group of related genes and the associated gene switches in eukaryotes

True or False: All of your body cells contain the same genes.

• True

• False

Tags

NGSS.HS-LS3-2