What is the effect of high glucose levels on the lac operon?

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Question: What is the effect of high glucose levels on the lac operon?

Options:

Correct Answer: Decreased transcription

Solution:

High glucose levels lead to low cAMP levels, which decreases the transcription of the lac operon.

What is the effect of high glucose levels on the lac operon?

What is the effect of high glucose levels on the lac operon?

Step 1: Understand that the lac operon is a set of genes in bacteria that help them use lactose for energy.
Step 2: Know that glucose is a preferred energy source for bacteria over lactose.
Step 3: When glucose levels are high, the bacteria do not need to use lactose, so they don't need the lac operon to be active.
Step 4: High glucose levels cause a decrease in a molecule called cAMP (cyclic AMP).
Step 5: cAMP is important because it helps activate the lac operon when glucose is low.
Step 6: With low cAMP levels, the lac operon is not activated, leading to decreased transcription of the genes needed to use lactose.

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