Gene Regulation and Expression 24

Front

What is gene expression?

Back

The conversion of DNA instructions into a product such as a protein.

Front

What is the function of a repressor in gene expression?

Back

It slows down transcription.

Front

Which cells in an organism contain the same DNA sequence?

Back

All cells, except red blood cells.

Front

What is the function of an activator in gene expression?

Back

It increases transcription.

Front

Why does E. Coli need the enzyme lactase?

Back

To digest lactose.

Front

What are the two main processes involved in gene expression?

Back

Transcription and translation.

Front

What role do transcription factors play in gene regulation?

Back

They help initiate or regulate the transcription of specific genes.

Front

What is the difference between constitutive and regulated gene expression?

Back

Constitutive expression is continuous, while regulated expression is controlled by specific signals.

Front

How does the lac operon function in E. Coli?

Back

It regulates the metabolism of lactose by controlling the expression of genes needed for lactose digestion.

Front

What is the significance of the promoter region in gene expression?

Back

It is the site where RNA polymerase binds to initiate transcription.