Explain how a protein may function as both repressor and activator in some bacterial operons by one example.
Added by Cheyenne T.
Step 1
Let's think step by step. Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 101 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
To accomplish regulation in prokaryotes, operons (segments of DNA) include specialized regions where a variety of regulatory proteins bind and detach to either initiate or inhibit transcription of the genes on that segment. (a) Identify two of the proteins involved in the gene regulation in prokaryotes and their function. (b) Describe the properties of the repressor that demonstrate it to be a protein. (c) Discuss the evidence that proves it to be a repressor within the operon. (d) Compare and contrast the roles of a repressor in an inducible system vs. its role in a repressible system.
Adi S.
What are some consistencies and discrepancies (think structure, regulation, function) amongst positive and negative transcriptional control of operons? Describe one operon in detail and relate it to a bacterial growth condition that it would be best suited to regulate.
Madhur L.
The lac operon is a classic example of gene regulation in bacteria. The operon itself is a cluster of genes that are under both negative (driven by a repressor protein) and positive (driven by an activator protein) control of expression (i.e., transcription and translation). In this exercise, you will review and practice describing the negative control of the lac operon. Redraw the operon using some kind of color coding (refer to Figure). Answer the following questions as you work through the steps of negative regulation. Make sure that each member of the group takes turns in explaining the operon to the fellow members. cAMP Polymerase Repressor Galactosidase Lactose permease Transacetylase
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