Bio | Lesson 22: Gene Regulation

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Multiple Choice

Which of these is not a level of gene regulation?

• protein degradation

• post-translational modification
• transcriptional regulation
• DNA replication regulation

Multiple Choice

In which way does chromatin structure regulate genes expression?

• Chromatin structure regulates gene expression by controlling DNA accessibility.
• Chromatin structure only influences RNA stability.
• Chromatin structure has no effect on gene expression.
• Chromatin structure enhances protein synthesis directly.

Match

Vocab match

• The process by which cells control which genes are turned on or off, deciding what proteins to make and when.

• Groups of related genes in prokaryotes that are controlled together by a single switch, helping the cell save energy and resources.

• A section of DNA where RNA polymerase binds to start transcription and make mRNA.

• A segment of DNA within an operon that acts as an "on/off" switch for gene expression, depending on whether a repressor is attached.

• A chemical change to DNA where a methyl group is added, usually turning a gene off by blocking transcription.

Gene Regulation

Operons

Promoter

Operator

Methylation

• Gene Regulation

• Operons

• Promoter

• Operator

• Methylation