NEET Botany Gene Regulation MCQ Question
If the concentration of lactose in the growth medium of E. coli is increased from 0 to 5 mM, which of the following changes is expected in the expression of the lac operon?
Increased transcription of the lac operon genes
Decreased transcription of the lac operon genes
No change in the transcription of the lac operon genes
Complete repression of the lac operon genes
Correct Answer
Detailed Explanation
The NCERT context states that lactose acts as an inducer of the lac operon. When lactose is present, it induces the operon by preventing the repressor from binding to the operator, thus increasing transcription.
Found an issue with this question?
Related Questions
More from
What is the function of tRNA in the process of translation?
Match the following
If the length of the DNA double helix in a typical mammalian cell is approximately 2.2 meters, and the distance between two consecutive base pairs is ...