situations will impact the Lac or Arg operons. High level of lactose inside cell High level of arginine inside the cell Low level of lactose inside cell Low level of arginine inside the cell Cell has mutation the results in arginine being constantly exported from the cell Cell has mutation that results in lactose being constantly exported from the cell
Added by Michael J.
Step 1
The presence of high levels of lactose will lead to the binding of the repressor protein to lactose instead of the operator region of the Lac operon. This will allow RNA polymerase to transcribe the genes involved in lactose metabolism. Show more…
Show all steps
Your feedback will help us improve your experience
Supreeta N and 54 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Q5.10. Suppose there is a mutation in an E. coli cell that causes CAP (the activator protein for the lac operon) to be unable to bind to its activator site. What effect would this have on the cell? The lac genes would never be expressed at a high level. Expression of the lac genes would not depend on lactose presence or absence. The lac genes would be expressed at very low levels or not at all. The lac genes would be expressed at a high level as long as lactose is present.
Supreeta N.
A mutation in the Lac repressor protein prevents it from binding to lactose. Will the Lac operon be expressed when lactose levels are high and glucose levels are low? Explain your reasoning.
Rabeya Z.
A mutation occurs in the lac repressor protein such that it can no longer bind to lactose. What effect will this mutation have on the expression of proteins of the lac operon in the presence of lactose? a. It will have no effect since lactose shuts off the operon. b. It will decrease the expression of the lac operon proteins. c. It will increase the expression of lac operon proteins. d. It will have no effect since the operon is modulated by another protein.
Sri K.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD