Bio- Gene Regulation

What is the role of DNA-binding proteins in prokaryotic gene regulation?

They regulate genes by controlling transcription.

What is an operon?

A cluster of genes organized together that are regulated as a unit.

What happens to the lac genes when there is no lactose present?

The lac genes turn off and there is no transcription.

What is the function of the lac repressor protein?

It binds to the operator to block transcription.

What is the TATA box and its role in eukaryotic gene regulation?

It is a DNA sequence of Ts and As that helps bind RNA polymerase.

What are enhancers in eukaryotic gene regulation?

They are regions that contain transcription factors produced as needed.

How is cell specialization achieved?

Through complex gene regulation.

Why is regulating gene expression important in multicellular organisms?

It ensures the proper development of specialized cell types from the same fertilized egg.

What do homeotic genes regulate?

They regulate organ development.

What is the function of Hox genes?

They determine the identity of body segments.

What is the importance of the lac operon in prokaryotes?

The lac operon allows prokaryotes to efficiently utilize lactose when glucose is scarce.

How does the presence of lactose affect the lac operon?

Lactose acts as an inducer, allowing the lac operon to be transcribed and enabling the digestion of lactose.