Purchase Solution

Nutrient environment and its effect on the Lac operon.

Not what you're looking for?

Ask Custom Question

What would be the effect on lac operon expression in the following media that contains a strain of E.Coli? What if this mutant also contained an O^- mutation?
a. Glucose
b. Lactose
c. Glucose + Lactose

Purchase this Solution
Solution Preview

It's important to understand how the lac operon is structured, and why beta-galactosidase is produced when lactose is present, and production is stopped when there is no more lactose left.

The lac operon produced three genes, one of them being beta-galactosidase, which breaks down lactose into galactose and glucose. When ...

Purchase this Solution
Free BrainMass Quizzes
The Plant Body

This quiz will test your knowledge of the anatomy of a common plant.

Identifying Variables in Science Experiments, Part 2

Using sample experiments, test yourself to see if you can identify independent, dependent, and controlled variables. Identifying variables is key in understanding and developing experiments. The questions are biology related, but this can be applied to any area of science.

Parts of the Brain

This quiz will test your knowledge on different areas of the brain.

Cellular Respiration

This quiz is a review for cellular respiration.

Feeding Babies

Do you know the science behind feeding babies? Test your knowledge with this quiz.

View More Free Quizzes
Related BrainMass Solutions

  • Schematic of the Lac Operon

    The lac operon also have another copy of the LacZ, LacI,and LacA on the second allele. The repressor protein can only bind to one copy of the allele on the operator of the lac operon.

  • Molecular Genetics of Prokaryotes

    Two, the lac Z- allele on the bacterial chromosome and the lac Z+ allele on the bacterial chromosome. Two, the lac Z- allele on the bacterial chromosome and the lac Z+ allele on the bacterial chromosome. D.

  • Analyzing Mutant Strains

    What would be the effect on lac operon expression in the following media? What if this mutant also contained an O^- mutation? a. Glucose b. Lactose c. Glucose + Lactose 2. A mutant strain of E.coli has constitutive expression of the trp operon.

  • Lac Operon: State Of Transcription

    The "good" or wildtype lac I gene will produce enough repressors to compensate for the bad mutated repressor lac I- on the other lac operon. (1) The normal repressor will travel to the operator on the other mutated lac I operon and bind to it.

  • Protein Targetting and the lac Operon

    The second half of this solution introduces the lac operon and its role in lactose metabolism is regulated.

  • Lac Operon - I gene

    There is no inducer to induce the expression of the lac operon. (1, 2) In the presence of lactose in the cell. the lactose binds to the repressor and causes the repressor to change in shape losing its affinity for the operator.

  • Prokaryotic Genetic Recombination and Types of Operons

    A repressor protein normally blocks the operator and promotor sites. lac operon is an example of inducible operons where presence of lactose in the environment inactivates the repressor protein and allows the RNA polymerase to attach to the operon and

  • Mutations Affecting the Function of the Lac Operon

    81105 Mutations affecting the function of lac operon Mutations can alter the function of an operon. Predict how the following mutations would affect the function of the lac operon in the presence and absence of allolactose (lactose).

  • Transcriptional control of the Lactose Operon.

    This means that the lactose operon is ONLY activated (or induced) under certain conditions. The presence of lactose and absence of glucose ACTIVATES the lac operon.

View More Related Solutions