Gene Regulation

Front

What is an operon?

Back

A group of related genes and the associated gene switches in prokaryotes.

Front

What mediates negative control of gene expression?

Back

Repressors.

Front

What is the effect of repressors on transcription frequency?

Back

They decrease the frequency of transcription.

Front

What role does lactose play in the operon?

Back

It allows the repressor to unbind from the operator.

Front

What is a repressor?

Back

A protein that binds to the operator and blocks RNA polymerase.

Front

What is a key similarity between prokaryotic and eukaryotic gene expression?

Back

Both use proteins to interact with the DNA to control gene expression.

Front

What is the function of an activator in gene regulation?

Back

It increases the frequency of transcription.

Front

What is the role of RNA polymerase in gene expression?

Back

It synthesizes RNA from the DNA template.

Front

What is the difference between prokaryotic and eukaryotic gene expression in terms of transcription and translation?

Back

Prokaryotic processes occur simultaneously, while eukaryotic processes are spatially separated.

Front

What is a corepressor?

Back

A molecule that binds to a repressor and enhances its ability to inhibit transcription.