MICROBIOLOGY-MASTERING MICRO.-ACCESS
11th Edition
ISBN: 9780321802705
Author: Tortora
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 28, Problem 3CAE
The antibiotic efrotomycin is produced by Streptomyces lactamdurans. S. lactamdurans was grown in 40,000 liters of medium. The medium consisted of glucose, maltose, soybean oil, (NH4)2SO4, NaCl, KH2PO4, and Na2HPO4. The culture was aerated and maintained at 28°C. The following results were obtained from analyses of the culture medium during cell growth:
- a. Under what conditions is the most efrotomycin produced? Is it a primary or secondary metabolite?
- b. Which is used first, maltose or glucose? Suggest a reason for this.
- c. What is the purpose of each ingredient in the growth medium? (Hint: See Chapter 6.)
- d. What is Streptomyces? (Hint: See Chapter 11.)
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Below is shown a growth curve for an E. coli culture. As indicated, the culture was incubated in the absence of a carbon source for 2 hours until Glucose and Lactose were added; Glucose was used up after 5 hours, and Lactose was used up after 8 hours. During the time-course, you take four samples, labeled A-D, after 1, 3, 7 and 9 hours, respectively, as indicated under the graph. Assuming there is cAMP present at t=0, for each sample identify whether CAP and/or the Lac Repressor would be bound to the DNA, and explain why.
Below is shown a growth curve for an E. coli culture. As indicated, the culture was incubated in the absence of a carbon source for 2 hours until Glucose and Lactose were added; Glucose was used up after 5 hours, and Lactose was used up after 8 hours. During the time-course, you take four samples, labeled A-D, after 1, 3, 7 and 9 hours, respectively, as indicated under the graph. Assuming there is cAMP present at t=0, for each sample identify whether CAP and/or the Lac Repressor would be bound to the DNA, and explain why.
The colony forming units (CFU)/ml in sauerkraut brine are given for different types of bacteria except for leuconostoc (shaded column). To obtain the Leuconostoc counts for different days, 40 microlitre of sauerkraut brine was 10-fold diluted and the CFU was determined by plating different dilutions on agar plates. For
Day 0 56 CFU were counted in 10-1 dilution,
Day 1 81 CFU were counted in 10-3 dilution,
Day 2 86 CFU were counted in 10-3 dilution
Day 5 78 CFU were counted in 10-5 dilution
Calculate the CFU/ml of leuconostoc in the brine for the 4 different days. Show your calculation
Chapter 28 Solutions
MICROBIOLOGY-MASTERING MICRO.-ACCESS
Ch. 28 - What is industrial microbiology? Why is it...Ch. 28 - How does commercial sterilization differ from...Ch. 28 - Why is a can of blackberries preserved by...Ch. 28 - Outline the steps in the production of cheese, and...Ch. 28 - Beer is made with water, malt, and yeast; hops are...Ch. 28 - Why is a bioreactor better than a large flask for...Ch. 28 - The manufacture of paper includes the use of...Ch. 28 - Describe an example of bioconversion. What...Ch. 28 - Prob. 9RCh. 28 - NAME IT Van Leeuwenhoek was the first to see this...
Ch. 28 - Which bacteria seem to be most frequently used in...Ch. 28 - Methylophilus methylotrophus can convert methane...Ch. 28 - Faded worn-look denim is produced with cellulase....Ch. 28 - Foods packed in plastic for microwaving are a....Ch. 28 - Acetobacter is necessary for only one of the steps...Ch. 28 - Use the following choices to answer questions 35:...Ch. 28 - The spoilage of canned foods caused by Geobacillus...Ch. 28 - A heat-resistant fungus that causes spoilage in...Ch. 28 - The term 12D treatment refers to a. heat treatment...Ch. 28 - Which one of the following is not a fuel produced...Ch. 28 - Which type of radiation is used to preserve foods?...Ch. 28 - Which of the following reactions is undesirable in...Ch. 28 - Which of the following reactions is an oxidation...Ch. 28 - Suppose you are culturing a microorganism that...Ch. 28 - Researchers at the CDC inoculated apple cider with...Ch. 28 - The antibiotic efrotomycin is produced by...
Additional Science Textbook Solutions
Find more solutions based on key concepts
How does trandlation differ from transcription?
Microbiology: Principles and Explorations
To test your knowledge, discuss the following topics with a study partner or in writing ideally from memory. Th...
Human Anatomy
CAUTION How can evolutionary fitness be estimated? a. Document how long individuals survive. b. Count the numbe...
Biological Science (6th Edition)
2. Why is it that the range of resting blood pressures of humans is best represented by a bell-shaped curve co...
Human Biology: Concepts and Current Issues (8th Edition)
Physiology a. deals with the processes or functions of living things. b. is the scientific discipline that inve...
SEELEY'S ANATOMY+PHYSIOLOGY
1. The correct sequence of levels forming the structural hierarchy is
A. (a) organ, organ system, cellular, che...
Human Anatomy & Physiology (Marieb, Human Anatomy & Physiology) Standalone Book
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What is the purpose of adding mineral oil to an O/F Media tube and why do we only put mineral oil in only one? Which sugars are typically tested in the phenol red broth? Can the phenol red test be also used to determine if a certain bacteria can metabolize various carbohydrates? Explain how conducting the MR/VP test too soon in a culture’s growth cycle can lead to false negatives? Generally, the color change we see in these tests is a result of what change in the media? Explain. What is the MR-VP results for coli and E. aerogenes?arrow_forwardSweet sorghum juice is used as sole carbon source for ethanol production by Saccharomyces cerevisiae. The overall in situ sterilisation duration is 40 minutes at 120 0C for a pilot reactor (50 L) which is filled with 60% of working volume. The non-sterile medium consists of 3.28 x 106 contaminants L-1. During the autoclaving process, you have noticed that the time taken for heating and cooling are 18 minutes and 15 minutes, respectively. As a process engineer, explain if you agree with this sterilisation practice by using quantitative analysis.arrow_forwardAnswer the following questions briefly and concisely 1.How do bacteria in a chemostat and those in a batch culture vary from one another? 2. What happens in a chemostat if the dilution rate is higher than the organism's maximum specific growth rate? 3.Does a chemostat require the use of pure cultures? 4. Why would a complicated culture media for Leuconostoc mesenteroides be simpler to make than one with a fixed chemical composition?arrow_forward
- Sydney Brenner isolated Salmonella typhimurium mutants that were implicated in the biosynthesis of tryptophan and would not grow on minimal medium. When these bacterial mutants were tested on minimal medium to which one of four compounds (indole glycerol phosphate, indole, anthranilic acid, and tryptophan) had been added, the growth responses shown in the following table were obtained. Mutant Minimal medium Anthranilic acid Indole glycerol phosphate Indole Tryptophan trp-1 − − − − + trp-2 − − + + + trp-3 − − − + + trp-4 − − + + + trp-6 − − − − + trp-7 − − − − + trp-8 − + − − + trp-9 − − − − + trp-10 − − − − + trp-11 − − − − + Give the order of indole glycerol phosphate, indole, anthranilic acid, and tryptophan in a biochemical pathway leading to the synthesis of tryptophan. Indicate which step in the pathway is affected by each of the mutations.arrow_forwardWhat would happen if an ampicillin reagent is added to an Lysogeny broth agar plate that is below 50 degrees Celsius. What would happen if it was added to an Lysogeny broth agar plate that is 50-55 degrees Celsius? Please draw two plates to demonstrate.arrow_forwardUsing the attached image, explain the observed results on the NA and ECM plates. Be sure to address why each sample is either able or unable to grow on each plate and include the genotype(s) of the cells which are capable of growth.arrow_forward
- To determine the number of cells in a pure culture of Klebsiella pneumoniae, you have performed a serial dilution using three tubes of sterile saline (9.9 ml each). A sample of 0.1 ml from the culture was added to tube 1. Similarly, 0.1 ml from tube 1 was used to inoculate tube 2, and tube 3 was inoculated using 0.1 ml from tube 2. A nutrient agar plate was then inoculated using 0.1 ml from tube 3 and incubated overnight. The next day, 92 colonies were observed on the plate. How many cfu/ml were in the original culture? Using a Petroff-Hauser counting chamber, the number of cells in the same culture was estimated to be 8.5 • 109 cells/ml. How can you explain these results?arrow_forwardUsing one of the graphs obtained with the medium II, name the different phases of the bacterial growth and indicate the starting and ending time points of these phases as well as the physiological characteristics of the bacteria during each phasearrow_forwardGiven the scenario, compute for the total volume of the culture media solution (milliliter or liter) and dehydrated media (grams). Scenario: The students of a Microbiology class were tasked to transfer or subculture a pure culture of Escherichia coli bacterium in five 7 mL nutrient broth and five petri dishes of nutrient agar with 20 mL capacity each. Based on the instruction bottles for nutrient broth and nutrient agar, preparation of the culture media is as follows. Nutrient broth: 8 g/liter Nutrient agar: 28 g/liter Formula: C1V1 = C2V2 *Concentration *Volume Computation: What are the answers to the following. Weight in grams of nutrient broth: _________ Distilled water in mL for nutrient broth: __________ Weight in grams of nutrient agar __________ Distilled water in mL for nutrient agar: ____________arrow_forward
- N. benthamiana will be infiltrated with a solution containing OD600=0.3 of each experimental Agro containing construct and OD600=0.1 of p19. Calculate the volume of cultures (V construct; V p19) needed according to the formulas: V construct = V final × 0.3/OD600; V p19 = V final × 0.1/OD600. One mL of infiltrate is often enough to complete a small experiment. How to plan your final volume accordingly?arrow_forwardA batch of turkey rolls (10 lb—approximately 4.5 Kg—each) were cooked to 165°F internal temperature in bags, opened, sliced, vacuum-packaged, and stored at 40°F. The product was expected to have a refrigerated shelf life of 50 days. However, after 40 days, the packages contained gas and approximately 107 bacterial cells/g of meat. The bacterial species involved in the spoilage was found to be Leuconostoc carnosum, which is killed at 165°F. What could be the sources of the bacterial species in this cooked product?arrow_forwardSydney Brenner isolated Salmonella typhimurium mutants that were implicated in the biosynthesis of tryptophan and would not grow on minimal medium. When these bacterial mutants were tested on minimal medium to which one of four compounds (indole glycerol phosphate, indole, anthranilic acid, and tryptophan) had been added, the growth responses shown in the following table were obtained. Mutant Minimal medium Anthranilic Indole glycerol acid Indole Tryptoph phosphate trp-1 trp-2 trp-3 trp-4 trp-6 trp-7 trp-8 trp-9 trp-10 trp-11 - Give the order of indole glycerol phosphate, indole, anthranilic acid, and tryptophan in a biochemical pathway leading to the synthesis of tryptophan. Indicate which step in the pathway is affected by each of the mutations. + 1 + 1 IIarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
QCE Biology: Introduction to Gene Expression; Author: Atomi;https://www.youtube.com/watch?v=a7hydUtCIJk;License: Standard YouTube License, CC-BY