#6 PT 2

What are housekeeping proteins?

• Proteins that are only expressed in certain cell types

• Proteins that are found in all cell types and are constantly expressed

• Proteins that are expressed in response to external stimuli

• Proteins that are never expressed in cells

What does "constitutive" gene expression mean?

• Gene expression that occurs only during cell division

• Gene expression that is regulated by external signals

• Gene expression that is constant and does not require external signals

• Gene expression that is temporary and changes frequently

Why is differential gene expression important?

• It prevents the expression of any genes within a cell

• It ensures that all cells express the same genes

• It allows for variation in cell size, shape, and function

• It is not important for cellular function

What is the SLOW version of changing gene expression referred to in the text?

• A change in the cell membrane

• A change in the making of a protein

• A change in DNA replication speed

• A change in the organism's behavior

Which of the following is NOT one of the three major types of gene regulation mentioned in the text?

• When/How often a gene is being transcribed

• The selective degradation of mRNA molecules

• The selective activation/deactivation of proteins

• The rate of glucose intake by the cell

What does "post-translational" refer to in the context of gene regulation?

• Before the gene is transcribed

• During the transcription of the gene

• After the translation of proteins

• During the replication of DNA

What is the function of histone acetylases in chromatin structure?

• They remove acetyl groups which closes DNA

• They add acetyl groups which opens DNA

• They bind to the promoter region near TATA

• They add methly which opens the DNA

Where do general transcription factors and RNA polymerase II bind for transcription?

• On regulatory sequences

• On histone deacetylases

• On the promoter region (near TATA)

• Far away from genes

What are regulatory sequences?

• Sites that remove ATP from DNA

• The promoter regions

• Sites that are far away from genes and regulate whether/how much a gene is expressed

• Sites where RNA polymerase II binds

What is the difference between transcription factors and general transcription factors?

• Transcription factors remove acetyl groups, while general transcription factors add them

• Transcription factors are the same as general transcription factors

• Transcription factors bind to the promoter region, while general transcription factors bind to regulatory sequences

• Transcription factors are what actually affect gene expression, different from general transcription factors