Regulation of Gene Expression

Observe the pic then answer the question that follows.

Question: Gene regulation is the process that is used to:

• help make sugars for cells in plants.

• turning genes on and off.

• make glycosomes in cells.

• Not sure. Code RED need help.

When gene expression occurs

• A gene is mutated with either an insertion or deletion

• The gene is removed from the genotype in that cell

• The gene is passed on to the daughter cells during mitosis

• The gene is activated and used in protein synthesis

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NGSS.HS-LS1-1

Which reason explains why nerve cells function differently than muscle cells?

• In nerve cells all the genes are expressed.

• In muscle cells all the genes are expressed.

• In both kinds of cells the same genes are expressed.

• In both kinds of cells different genes are expressed.

Most gene regulation happens at which step along the way?

• translation
• transcription
• signal transduction
• DNA replication

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

In the trp operon, __ acts as a __ and helps the repressor bind to the operator.

• tryptophan, corepressor

• tryptophan, inducer

• lactose, corepressor

• lactose, inducer

Where does the RNA Polymerase bind to for the initiation of

• Regulator

• Structural genes

• Operator

• Promotor

RNA polymerase needs --- to initiate transcription.

• holoenzymes

• transcriptional factors

• histones

• microRNA

which is correct?

• heterochromatin-dense, no transcription;

  euchromatin- not dense, transcription

• euchromatin-dense, no transcription;

  heterochromatin- not dense, transcription

• histone acetylation- increase transcription; histone methylation (and DNA methylation)- decrease transcription

• histone methylation- increase transcription; histone acetylation- decrease transcription

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

• True

• False

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NGSS.HS-LS1-4