BIO111 Chp 16 Gene Expression

BIO111 Gene Expression

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7uj

Multiple Choice

At what level does prokaryotic gene regulation take place?

• Transcription

• Translation

• Post-translational modification of proteins

Multiple Select

Which levels include types of gene expression in eukaryotes?

• Transcription

• Translation

• Post-translational modification of proteins

Multiple Choice

Proteins that bind to the operator sequence and silence gene expression via halting transcription

• Negative Regulators

• Inducible Operons

• Positive Regulators

Multiple Choice

Proteins that activate or repress transcription

- Activation/repression depends on the local environment and the needs of the cell.

• Negative Regulators

• Inducible Operons

• Positive Regulators

Multiple Choice

Proteins that bind the promoter in order to activate gene expression via turning on transcription

• Negative Regulators

• Inducible Operons

• Positive Regulators

You can't express a gene if a polymerase can't access it!

Multiple Choice

Which type of chemical tag causes the tightening of the nucleosomes?

• DNA methylation

• Histone acetylation?

Multiple Choice

Which type of chemical tag causes the relaxing and unwinding of nucleosomes?

• Histone acetylation

• DNA methylation

Multiple Choice

Transcription activation factors bind to the _______ in the enhancer region of DNA. (hint- multiple genes can have the same promoter region but still have different molecules of these)

• TATA box

• RNA Polymerase

• Distal Control Elements

Multiple Choice

What are exon skipping, mutually exclusive exons, and intron retention all examples of in gene expression in eukaryotes?

• Epigenetics

• RNA stability

• RISC silencing complex

• Alternative splicing

Multiple Choice

What does the RISC silencing complex accomplish to mRNAs?

• Enhance translation

• degrade the mRNA

• cause a stop codon

• stop transcription before it occurs

Multiple Choice

When eIf-2 is ___________, a conformation change occurs and translation cannot occur

• methylated

• acetylated

• phosphorylated

Multiple Choice

Proto-oncogenes are a type of _________ ___________ that regulate the cell cycle.

• Negative regulators

• Positive regulators

• Inducible operons

Fill in the Blank

When mutations occur in tumor suppressor genes, proto-oncogenes, and overexpression of EGFR, this can lead to types of ______

Summary/What to Study

What is gene expression?

Types of prokaryotic gene regulation (positive and negative regulators, and inducible operons)

Types of eukaryotic gene regulation (Epigenetics, transcriptional, post transcriptional, & Translational)

Cancer causes linked to gene regulation