ASSIGNMENTS FOR CHAPTER 4. 1. Assignment 1: By using the general equation N = No x 2n where Nt is the number of cells at given time (in minutes) and No is the initial number of cells, and "n" is the number of generations at that point (number of cell division), calculate how many cells you will have in 30, 60, 90, and 120 minutes if your bacteria has a generation time of 30 minutes and you start with 100 cells at 0 time. %3D

ASSIGNMENTS FOR CHAPTER 4. 1. Assignment 1: By using the general equation N = No x 2n where Nt is the number of cells at given time (in minutes) and No is the initial number of cells, and "n" is the number of generations at that point (number of cell division), calculate how many cells you will have in 30, 60, 90, and 120 minutes if your bacteria has a generation time of 30 minutes and you start with 100 cells at 0 time. %3D

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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REVIEW Name: Chapter 6: Bacteria & Viruses Choose the Answer. Circle the answer that correctly completes each sentence. 1. (Bacteria) Flagella) can cause diseases. 2. A fprokaryote, eukaryote) is an organism that does not have a nucleus. 3. Most bacteria have just one strand of (DNA, cocci) surrounded by cytoplasm. 4. A (host, virus) can be shaped like a polyhedron, sphere, cylinder, or spacecraft. 5. Viruses (can, cannot) reproduce on their own. Fill in the Blank. Use the words in the word bank to complete the sentences. bacteria heat-lovers methane-makers salt-lovers mouth 6. Good bacteria are found in your and digestive system. 7. such as E. coli and Salmonella can make people sick and may even be deadly. 8. live in swamps and animal intestines. 9. live in salty environments like the Dead Sea. 10. live in extreme heat like underwater vents, geysers, and springs. REPRODUCIBLE 133
QUESTION: Microbes from a blood culture inoculated with blood drawn from a catheter were determined by the appearance of growth on Mannitol Salts Agar and through other tests to be Staphylococcus epidermidis. It can be concluded that: a. a bloodstream infection caused by S. epidermidis is occurring in the patient from whom the blood was drawn b. The bacteria fermented mannitol, changing the color of the growth medium from pink to yellow. c S. epidermidis is present in the sample as a normal flora contaminant d. That in order to determine if a bloodstream infection is present, these results must be compared to a blood culture of a sample drawn from a peripheral vein
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Need help with questions 5) Given your review of the Gram Stain and the structural basis for how it works, why would a cell wall synthesis inhibitor be more effective for a Gram-positive cell type? 6) Given your knowledge of molecular biological principles, why would a protein synthesis inhibitor work with both cell types? Why might one protein synthesis inhibitor be more effective than another? For the second part - Hint: Think of change....what might have changed? 7) Given your knowledge of molecular biological principles, why are metabolic inhibitors not effective? Hint: Think of change....what might have changed? 8) A Gram-negative infection has been determined in a patient, what antibiotic would you suggest for treatment and why?
Practice Question Chapter 3 During the maturing process of certain cheeses, molds are added to the cheese to participate in the flavouring, protecting, and maturing of the cheese. If you like blue cheese, like Stilton cheese, eating Penicillium, the mold added to the cheese which gives it its distinct marbled colouring. Photo from Wikipedia. you like 2. How could a mold like Penicillium be protective against certain contaminants but not others? You shouldn't have to search the internet for an answer.
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FINDING THE ENVIRONMENTAL CULPRIT
Practice Question Chapter 3 Another source of contamination cheesemakers really worry about are bacteriophages. Entire batches of cheese can be ruined in a matter of days by bacteriophages infecting lactic acid bacteria. 4. Should cheesemakers be worried about endospore growth of Gram-positive cells? Why or why not?
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Need help with questions 1) Evaluate the data for each organism. Is each organism equally impacted by the chemotherapeutic agents listed? Use your data to support your answer. 2) When you compare the data for the Gram-positive cell to the data for the Gram-negative cell, can you say there is similar impact? Use your data to support your answer. 3) Which antibiotic(s) is/are more effective against the Gram-positive cell type? Gram-negative cell type? Use your data to support your answers. 4) Which antibiotic(s) is/are least effective against the Gram-positive cell type? Gram-negative cell type? Use your data to support your answers.