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You perform an experiment, in which you inoculate bacteria into a medium that contains glucose and lactose (a disaccharide composed of two monosaccharides, glucose and galactose) as a sole source of carbon and energy, then monitor the number of cells and which sugar is being metabolized over time, with the results shown in this figure. All of the following are correct observations about the results EXCEPT: Time Al glucose conymed Glucose Time 50 La Bacteria growing on glucose as the sole carton source growser than on Bacteria growing in medium conting and lactose first consume the glucose and the short lag me the During The lag time, celular CAM increases the Lacose used operon is transcribed lactose is transported into the coland- sidase is synthesized to The number of cells increased more rapidly when lactose was utilized compared with glucose The lag time shows that an inducible enzyme had to be produced before lactose metabolism could proceed The bacteria could use either glucose or lactose as a source of carbon and energy. None of the other four answers (All are true) The bacteria preferentially metabolized glucose before starting to metabolize lactose

You perform an experiment, in which you inoculate bacteria into a medium that contains glucose and lactose (a disaccharide composed of two monosaccharides, glucose and galactose) as a sole source of carbon and energy, then monitor the number of cells and which sugar is being metabolized over time, with the results shown in this figure. All of the following are correct observations about the results EXCEPT: Time Al glucose conymed Glucose Time 50 La Bacteria growing on glucose as the sole carton source growser than on Bacteria growing in medium conting and lactose first consume the glucose and the short lag me the During The lag time, celular CAM increases the Lacose used operon is transcribed lactose is transported into the coland- sidase is synthesized to The number of cells increased more rapidly when lactose was utilized compared with glucose The lag time shows that an inducible enzyme had to be produced before lactose metabolism could proceed The bacteria could use either glucose or lactose as a source of carbon and energy. None of the other four answers (All are true) The bacteria preferentially metabolized glucose before starting to metabolize lactose

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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You perform an experiment, in which you inoculate bacteria into a medium that contains glucose and lactose (a disaccharide composed of two monosaccharides, glucose and galactose) as a sole source of carbon and energy, then monitor the number of cells and which sugar is being metabolized over time, with the results shown in this figure. All of the following are correct observations about the results EXCEPT: (a) Bacteria growing on glucose as the sole carbon source grow faster than on lactose. Log10 of number of cells- Time All glucose consumed Glucose used Glucose Time ©2019 Pearson Education Inc Lag time Lactose Lactose used (b) Bacteria growing in a medium containing glucose and lactose first consume the glucose and then, after a short lag time, the lactose. During the lag time, intra- cellular CAMP increases, the lac operon is transcribed, lactose is transported into the cell, and B-galacto- sidase is synthesized to break down lactose. The number of cells increased more rapidly when lactose was utilized compared with glucose The lag time shows that an inducible enzyme had to be produced before lactose metabolism could proceed The bacteria could use either glucose or lactose as a source of carbon and energy. None of the other four answers (All are true) The bacteria preferentially metabolized glucose before starting to metabolize lactose
Transcribed Image Text:You perform an experiment, in which you inoculate bacteria into a medium that contains glucose and lactose (a disaccharide composed of two monosaccharides, glucose and galactose) as a sole source of carbon and energy, then monitor the number of cells and which sugar is being metabolized over time, with the results shown in this figure. All of the following are correct observations about the results EXCEPT: (a) Bacteria growing on glucose as the sole carbon source grow faster than on lactose. Log10 of number of cells- Time All glucose consumed Glucose used Glucose Time ©2019 Pearson Education Inc Lag time Lactose Lactose used (b) Bacteria growing in a medium containing glucose and lactose first consume the glucose and then, after a short lag time, the lactose. During the lag time, intra- cellular CAMP increases, the lac operon is transcribed, lactose is transported into the cell, and B-galacto- sidase is synthesized to break down lactose. The number of cells increased more rapidly when lactose was utilized compared with glucose The lag time shows that an inducible enzyme had to be produced before lactose metabolism could proceed The bacteria could use either glucose or lactose as a source of carbon and energy. None of the other four answers (All are true) The bacteria preferentially metabolized glucose before starting to metabolize lactose
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