Connect With Learnsmart Labs Online Access For Prescott's Microbiology
11th Edition
ISBN: 9781260408997
Author: Joanne Willey
Publisher: Mcgraw-hill Higher Education (us)
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Textbook Question
Chapter 7.4, Problem 5CC
Suppose the generation time of a bacterium is 90 minutes and the number of cells in a culture is 103 cells at the start of the log phase. How many bacteria will there be after 8 hours of exponential growth?
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If it takes 2 hours for a population of bacteria to grow from 100 cells to 1600 cells, what is the generation time of this bacterial species?
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If a bacterium has a generation time of 30 minutes, and you start with 100 cells at time 0, how many cells will you have in 30, 60, 90, and 120 minutes?
If a single 1.7 × 10−10 m3 bacterium could reproduce through cell division at a rate of 3(t − 0.5t), where t is measured in minutes, how much volume (in m3) will the resulting bacteria colony occupy after 1 hour?
bacteria colony volume = _____ × 104 m3
Chapter 7 Solutions
Connect With Learnsmart Labs Online Access For Prescott's Microbiology
Ch. 7.1 - MICRO INQUIRY In addition to chromosomes, what...Ch. 7.2 - MICRO INQUIRY Why is it important that the origin...Ch. 7.2 - MICRO INQUIRY What would be the outcome if FtsZ...Ch. 7.2 - MICRO INQUIRY Which step in the development of...Ch. 7.2 - Retrieve, Infer, Apply 1. Describe the three...Ch. 7.2 - Retrieve, Infer, Apply 2. How does the bacterial...Ch. 7.2 - Retrieve, Infer, Apply 3. Do you think MinCDE...Ch. 7.2 - Retrieve, Infer, Apply 4. Do you think Spiroplasma...Ch. 7.3 - What elements of the Sulfolobus spp. cell cycle...Ch. 7.3 - Many archaea have genes encoding an FtsZ...
Ch. 7.4 - MICRO INQUIRY Identify the regions of the growth...Ch. 7.4 - Retrieve, Infer, Apply Define microbial growth.Ch. 7.4 - Retrieve, Infer, Apply Describe the phases of the...Ch. 7.4 - Why would cells that are vigorously growing when...Ch. 7.4 - Calculate the growth rate constant and generation...Ch. 7.4 - Suppose the generation time of a bacterium is 90...Ch. 7.5 - What is the difference between halophilic and...Ch. 7.5 - Why do facultative anaerobes grow best at the...Ch. 7.5 - Retrieve, Infer, Apply 1. How do microorganisms...Ch. 7.5 - Retrieve, Infer, Apply 2. Define water activity...Ch. 7.5 - Prob. 1.3CCCh. 7.5 - Retrieve, Infer, Apply 1. Define pH, acidophile,...Ch. 7.5 - Retrieve, Infer, Apply Classify each of the...Ch. 7.5 - Retrieve, Infer, Apply 3. Describe the mechanisms...Ch. 7.5 - Retrieve, Infer, Apply 1. What are cardinal...Ch. 7.5 - Prob. 3.2CCCh. 7.5 - Prob. 3.3CCCh. 7.5 - Prob. 3.4CCCh. 7.5 - Retrieve, Infer, Apply Describe the five types of...Ch. 7.5 - Retrieve, Infer, Apply What are the toxic effects...Ch. 7.5 - Retrieve, Infer, Apply Where would you expect to...Ch. 7.5 - Retrieve, Infer, Apply List the types of...Ch. 7.5 - Prob. 5.3CCCh. 7.5 - Prob. 5.4CCCh. 7.6 - MICRO INQUIRY What biomolecules make up the...Ch. 7.6 - Prob. 1CCCh. 7.6 - Prob. 2CCCh. 7.6 - Prob. 3CCCh. 7.6 - Retrieve, Infer, Apply What is quorum sensing?...Ch. 7.6 - Retrieve, Infer, Apply How is the communication...Ch. 7.7 - Prob. 1CCCh. 7.7 - What are peptones, yeast extract, beef extract,...Ch. 7.7 - Retrieve, Infer, Apply Describe four ways in which...Ch. 7.7 - What are pure cultures and why are they important?...Ch. 7.7 - Retrieve, Infer, Apply It is known that microbial...Ch. 7.7 - Retrieve, Infer, Apply How might an enrichment...Ch. 7.8 - Why is it important to have no more than about 250...Ch. 7.8 - Briefly describe each technique by which microbial...Ch. 7.8 - Prob. 2CCCh. 7.8 - Prob. 3CCCh. 7.8 - For each of the following, which enumeration...Ch. 7.9 - Prob. 1MICh. 7.9 - Prob. 1CCCh. 7.9 - Prob. 2CCCh. 7.9 - Prob. 3CCCh. 7 - Prob. 1RCCh. 7 - Prob. 2RCCh. 7 - Prob. 3RCCh. 7 - Prob. 4RCCh. 7 - Prob. 5RCCh. 7 - Prob. 6RCCh. 7 - As an alternative to diffusible signals, suggest...Ch. 7 - If you wished to obtain a pure culture of bacteria...Ch. 7 - Prob. 3ALCh. 7 - Suggest one specific mechanism underlying the...Ch. 7 - Consider cell-cell communication: bacteria that...Ch. 7 - Suppose you discovered a new bacterial strain from...Ch. 7 - Prob. 7ALCh. 7 - Prob. 8ALCh. 7 - Prob. 9AL
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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 generation time (in minutes) of a bacterial population that increases from 10,000 cells to 10,000,000 cells in fours hours of growth? Show computation.arrow_forwardSuppose that you were tasked with 4 cultures of a specific Bacteria Species in Luria Broth medium: (1) culture A – cells are in lag phase; (2) culture B – cell in log phase; (3) culture C – cells in stationary phase; and culture D – cells in decline phase. Imagine that you observe the growth rates of each culture in a fresh sterilized LB medium. Now, plot the outcome growth curves of cultures A, B, C and D in a single graph.arrow_forwardWhich of the following is the best definition of generationtime?(a) The length of time it takes for lag phase to occur(b) The length of time it takes a population of cells to double(c) The minimum length of time it takes a cell to divide(d) The length of time a culture stays in stationary phase(e) The length of time it takes log phase to occurarrow_forward
- A bacterial culture contains 500 cells/mL in the exponential growth phase at 8 AM. If you consider a generation time 20 minutes, what will be the total number of cells/mL after three hours (i.e. at 11 AM)?arrow_forwardmake a graph out of this t = time of growth of bacteria in mins y = number of bacteriaarrow_forwardCalculate the generation time in a growth experiment in which a medium was inoculated with 5 X 106 cells/mL of E. coli cells and following a 1 hour lag, grew exponentially for 5 hours, after which the population was 5.4 X 109cells/mLarrow_forward
- A bacterial culture contains 500 organisms / mL in the exponential growth phase at 8 am in the morning. If you consider a generation time of 20 minutes, the total number of organisms / mL (round off to the nearest integer) after three hours (i.e. at 11 am in the morning) will bearrow_forwardDescribe how to most easily calculate the generation time for a population of bacteria in a batch culture in a closed system. Also explain why the calculation is made in a special phase of the growth curvearrow_forward+ Slider1 + Slider2 108 107 106 105 104 30 60 90 120 150 180 210 240 Time in minutes Determine the following: 1. The shortest generation time (shortest cell doubling time, in mins) of the organism 2. The growth rate of the organism at the point where its generation time is shortest 3. Describe the organism's growth curve using the numerical data you obtained from your calculations of generation time and growth rate. Cell numbersarrow_forward
- How can I solve this equation?arrow_forwardA bacterium has a generation time of 30 minutes. You transfer cells from an exponentially growing culture to a fresh source of the same medium so that the freshly inoculated medium contains 3.2 x 106 cells per milliliter. This new culture does not exhibit a lag phase. About how many cells (per milliliter) should you have after 1.5 hours incubation?? Solve this step by step and by using formulaarrow_forwardIf the original number of cells in a sample was 12,000, how many bacteria will be present in 12 hours when the generation time is 15 minutes?arrow_forward
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