Question

What does different concentrations of glucose do to the induction of ßgalactosidase by lactose?

What does different concentrations of glucose do to the induction of ßgalactosidase by lactose?

Homework Answers

Answer #1

Ans: The structural gene called LacZ of the lac operon is responsible for the production of the enzyme beta-galactosidase. This enzyme converts lactose into glucose and galactose. The process of transcription starts only when lactose is present or externally supplemented in the culture medium. When a culture medium is supplemented with different concentrations of glucose, there would be lowered beta-galactosidase enzyme activity. So, the lac operon would be unable to transcribe the LacZ gene (or basal level of transcription may occur) and as a result, its concentration would be very less in the medium. The bacterial cells readily start to utilize glucose. Such type of effect is also referred to as glucose effect.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Why is lacZ required for lacY induction by lactose, but not IPTG? A. Because LacZ is...
Why is lacZ required for lacY induction by lactose, but not IPTG? A. Because LacZ is a transcriptional regulator of lacY. B. Because LacZ produces allo-lactose required for induction. C. None of the answers are correct . D. Because LacZ produces cAMP required for induction. E. Because LacZ allosterically inactivates the LacI repressor.
Escherichia coli can ferment glucose and lactose, but not sucrose. Proteus vulgaris can ferment glucose and...
Escherichia coli can ferment glucose and lactose, but not sucrose. Proteus vulgaris can ferment glucose and sucrose, but not lactose. What color would the phenol red tests be for both organisms if you tested all three sugars?
1. for which of the five solutions with different concentrations of glucose were your potato isotonic?...
1. for which of the five solutions with different concentrations of glucose were your potato isotonic? which were hypertonic and which were hypertonic? 2. would increasing the temperature of the glucose solutions that you usd by 5c hsvr cuased your concusions to be different? 3. an intravenous adminstration of 5% gluscose (destrose is commanly used as a maintance fluid for patients unable to drink water. Do you execpt that solution to be hypotonic relative to red blood cell
why can't lactose go through fermentation with yeast but sucrose and glucose can?
why can't lactose go through fermentation with yeast but sucrose and glucose can?
Galactosemia is a recessive human disease that is treatable by restricting lactose and glucose in the...
Galactosemia is a recessive human disease that is treatable by restricting lactose and glucose in the diet. Susan Smithers and her husband are both heterozygous for the galactosemia gene. If the couple has four children with galactosemia, what is the probability that their next child will have galactosemia?
The decrease in glucose concentrations is due to the use of ............... reserves in the liver....
The decrease in glucose concentrations is due to the use of ............... reserves in the liver. When these reserves are exhausted, two mechanisms take place to maintain ................... near normal level and to provide  to the body. The first metabolic pathway is ............. that allows the hepatic synthesis of glucose from ............... , ..............., and  (3 different molecules). The second metabolic pathway is .................. that allows the release of free fatty acids leading by beta-oxidation to the production of : ...........the ...........,...
using maltose and lactose structures, explain why lactose and maltose need different enzymes
using maltose and lactose structures, explain why lactose and maltose need different enzymes
A bacterial cell is in an environment that contains both lactose and glucose, this cell has...
A bacterial cell is in an environment that contains both lactose and glucose, this cell has a mutation in adenyl cyclase which results in its continuous activation. Identify the expression level of its lac operon and briefly explain your answer
Lactose is broken down into monosacharides in the stomach through the following reaction: Lactose + H2O...
Lactose is broken down into monosacharides in the stomach through the following reaction: Lactose + H2O ------> Glucose + Galactose Chemicals: Lactose-C12H22O11 Glucose-C6H12O6 Galactose-C6H12O6 1) Find the standard heat of the reactio for this conversion 2) The above reaction is usually catalyzed by the enzyme lactase. However, lactose-intolerant people are not able to produce lactase and become ill when they consume too much lactose. Suppose that you hve developed a new treatment for lactose intolerance. To test its effectiveness, you...
1- What are slip and slip speed in an induction motor? 2- How does an induction...
1- What are slip and slip speed in an induction motor? 2- How does an induction motor develop torque? 3- Why is it impossible for an induction motor to operate at synchronous speed? 4- Sketch and explain the shape of a typical inductionmotor torque-speed characteristic curve? Make the work clear, understandable and readable please. Thanks!