30 points
Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- CSIR NET
- Life Sciences
What hapeen when lactose and glucose present, to the lac operon
what hapeen when lactose and glucose present, to the lac operon
1 Answer(s)
Answer Now
- 0 Likes
- 1 Comments
- 0 Shares
Do You Want Better RANK in Your Exam?
Start Your Preparations with Eduncle’s FREE Study Material
- Updated Syllabus, Paper Pattern & Full Exam Details
- Sample Theory of Most Important Topic
- Model Test Paper with Detailed Solutions
- Last 5 Years Question Papers & Answers
Sign Up to Download FREE Study Material Worth Rs. 500/-
Priya sarda![best-answer]()
When lactose is present, the lac repressor loses its DNA-binding ability. This clears the way for RNA polymerase to bind to the promoter and transcribe the lac operon. Glucose therefore stops activation of the lac operon (a cluster of coordinately regulated genes involved in lactose catabolism), which prevents lactose use and leads to preferential use of glucose. If lactose is absent and glucose is present , the gene products from the lac operon are not needed. Thus a regulatory factor, the repressor protein, prevents lac operon expression.