Which protein binds to the operator region of the lac operon?

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Question: Which protein binds to the operator region of the lac operon?

Options:

Correct Answer: Lac repressor

Solution:

The lac repressor binds to the operator region of the lac operon, preventing transcription of downstream genes when lactose is absent.

Which protein binds to the operator region of the lac operon?

Which protein binds to the operator region of the lac operon?

Step 1: Understand what the lac operon is. It is a group of genes in bacteria that help them use lactose as food.
Step 2: Learn about the operator region. This is a specific part of the lac operon where proteins can bind to control gene activity.
Step 3: Identify the protein that binds to the operator region. This protein is called the lac repressor.
Step 4: Know the function of the lac repressor. When lactose is not present, the lac repressor attaches to the operator region.
Step 5: Understand the effect of the lac repressor binding. It prevents the transcription (copying) of the genes needed to break down lactose.

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