What happens to the expression of the lacI gene if lactose is not available in the cell? View Available Hint (s)

What happens to the expression of the lacI gene if lactose is not available in the cell?

The lacI gene increases its rate of transcription.

The lacI gene turns on. The lacI gene turns off.

There is no change-the lacI gene is constitutively expressed.

Question

Biology

Nikolai Pugh

6 November, 18:35

What happens to the expression of the lacI gene if lactose is not available in the cell? View Available Hint (s)

What happens to the expression of the lacI gene if lactose is not available in the cell?

The lacI gene increases its rate of transcription.

The lacI gene turns on. The lacI gene turns off.

There is no change-the lacI gene is constitutively expressed.

+1

Answers (1)

Know the Answer?

Alia Wagner · Answer 1

There is no change, the lac l gene is constitutively expressed, regardless of the presence of lactose.

Explanation:

Lacl gene codes for the lac repressor hence is always expressed to produce lac repressors which may or may not be bounded dependent on the presence of lactose. Lacl gene expression is not regulated, thus is constitutively expressed.