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Case Study: You are asked to inoculate lactose media (broth) with E. coli that was growing exponentially in glucose media (broth). You monitor the growth of these cells in the lactose broth using a viable plate count technique and plot the Growth Curve for E. coli growin lactose. After a day of monitoring the cells, you note that the culture entered into lag phase growth initially and is now currently growir exponentially. In addition, you find that the cultures doubling time is 30 minutes. You know that the doubling time of E. coli in glucose media is 20 minutes. You did not change the oxygen content or temperature at which you were growing the cells, E. coli is still aerobica respiring at 37°C. Question: If the lac operon is 'on' what does this imply about the cell? O The cell is dying and the lac operon is going to induce apoptosis. Apoptosis is truly cell death and the cells will enter into the death phase of the Growth Curve. O Lactose is being catabolized and glucose is no longer present. In addition, the inducer allolactose, is inhibiting the repressor protein. O Glucose is being catabolized by the cell and it will efflux lactose. In addition, CAMP levels are high and inhibiting the promoter. Genes for lactose catabolism are being transcribed as the repressor allolactose is no longer blocking the operator region of the operon.

Case Study: You are asked to inoculate lactose media (broth) with E. coli that was growing exponentially in glucose media (broth). You monitor the growth of these cells in the lactose broth using a viable plate count technique and plot the Growth Curve for E. coli growin lactose. After a day of monitoring the cells, you note that the culture entered into lag phase growth initially and is now currently growir exponentially. In addition, you find that the cultures doubling time is 30 minutes. You know that the doubling time of E. coli in glucose media is 20 minutes. You did not change the oxygen content or temperature at which you were growing the cells, E. coli is still aerobica respiring at 37°C. Question: If the lac operon is 'on' what does this imply about the cell? O The cell is dying and the lac operon is going to induce apoptosis. Apoptosis is truly cell death and the cells will enter into the death phase of the Growth Curve. O Lactose is being catabolized and glucose is no longer present. In addition, the inducer allolactose, is inhibiting the repressor protein. O Glucose is being catabolized by the cell and it will efflux lactose. In addition, CAMP levels are high and inhibiting the promoter. Genes for lactose catabolism are being transcribed as the repressor allolactose is no longer blocking the operator region of the operon.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Case Study: You are asked to inoculate lactose media (broth) with E. coli that was growing exponentially in glucose media (broth). You monitor the growth of these cells in the lactose broth using a viable plate count technique and plot the Growth Curve for E. coli growing c lactose. After a day of monitoring the cells, you note that the culture entered into lag phase growth initially and is now currently growing exponentially. In addition, you find that the cultures doubling time is 30 minutes. You know that the doubling time of E. coli in glucose media is 20 minutes. You did not change the oxygen content or temperature at Which you were growing the cells, E. coli is still aerobically respiring at 37°C. Question: If the lac operon is 'on' what does this imply about the cell? O The cell is dying and the lac operon is going to induce apoptosis. Apoptosis is truly cell death and the cells will enter into the death phase of the Growth Curve. O Lactose is being catabolized and glucose is no longer present. In addition, the inducer allolactose, is inhibiting the repressor protein. O Glucose is being catabolized by the cell and it will efflux lactose. In addition, CAMP levels are high and inhibiting the promoter. O Genes for lactose catabolism are being transcribed as the repressor allolactose is no longer blocking the operator region of the operon. No new data to save. Last checked at 8:18pm Submit MacBook Air
Transcribed Image Text:Case Study: You are asked to inoculate lactose media (broth) with E. coli that was growing exponentially in glucose media (broth). You monitor the growth of these cells in the lactose broth using a viable plate count technique and plot the Growth Curve for E. coli growing c lactose. After a day of monitoring the cells, you note that the culture entered into lag phase growth initially and is now currently growing exponentially. In addition, you find that the cultures doubling time is 30 minutes. You know that the doubling time of E. coli in glucose media is 20 minutes. You did not change the oxygen content or temperature at Which you were growing the cells, E. coli is still aerobically respiring at 37°C. Question: If the lac operon is 'on' what does this imply about the cell? O The cell is dying and the lac operon is going to induce apoptosis. Apoptosis is truly cell death and the cells will enter into the death phase of the Growth Curve. O Lactose is being catabolized and glucose is no longer present. In addition, the inducer allolactose, is inhibiting the repressor protein. O Glucose is being catabolized by the cell and it will efflux lactose. In addition, CAMP levels are high and inhibiting the promoter. O Genes for lactose catabolism are being transcribed as the repressor allolactose is no longer blocking the operator region of the operon. No new data to save. Last checked at 8:18pm Submit MacBook Air
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