Microbiology with Diseases by Body System - With Access (Custom)
4th Edition
ISBN: 9781269950060
Author: BAUMAN
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 6, Problem 3TMW
Some students transfer some “gunk” from a 2-week-old bacterial culture into new media. Why shouldn't they be surprised when this “death-phase” sample grows?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
In an experiment, the bacteria were placed in dropper bottles containing glycerol as a carbonsource. Why did the culture have to be incubated for an hour in the new media?
The acid fast bacterium, Mycobacterium smegmatis, is relatively safe for students to work with because of its thin cell wall. If a gram stain is to be performed on this particular microbe, it often takes the gram stain reaction. Why?
A student inoculates Escherichia coli into two test tubes containing the same sterile liquid medium, except the first tube also contains a drop of a chemical disinfectant with an antimicrobial effect. After 24 hours of incubation, the first tube remains clear while the second tube becomes cloudy with bacteria. How would you go about determining if the chemical is bacteriostatic or bactericidal?
Chapter 6 Solutions
Microbiology with Diseases by Body System - With Access (Custom)
Ch. 6 - Why should cardiac nurses and respiratory...Ch. 6 - Cavities Gone Wild Five-year-old Daniel appears to...Ch. 6 - Why do clinical laboratory scientists keep many...Ch. 6 - Boils in the Locker Room For several weeks,...Ch. 6 - Some students transfer some gunk from a 2-week-old...Ch. 6 - Which of the following can grow in a Petri plate...Ch. 6 - In the laboratory, a sterile inoculating loop is...Ch. 6 - Superoxide dismutase _____________. a. causes...Ch. 6 - The most reactive of the four toxic forms of...Ch. 6 - Microaerophiles that grow best with a high...
Ch. 6 - Prob. 6MCCh. 6 - Organisms that preferentially may thrive in icy...Ch. 6 - Prob. 8MCCh. 6 - Which of the following terms best describes an...Ch. 6 - In a defined medium, ______________. a. the exact...Ch. 6 - Which of the following is most useful in...Ch. 6 - Which of the following methods is best for...Ch. 6 - A Coulter counter is a(n) ________________. a....Ch. 6 - Lyophilization can be described as ___________. a....Ch. 6 - Quorum sensing is _____________. a. the ability to...Ch. 6 - Prob. 1FIBCh. 6 - Prob. 2FIBCh. 6 - Prob. 3FIBCh. 6 - Prob. 4FIBCh. 6 - Prob. 5FIBCh. 6 - Fill in the Blanks 6. Cells that shrink in...Ch. 6 - Fill in the Blanks 7. Obligate ________ exist in...Ch. 6 - Prob. 8FIBCh. 6 - Fill in the Blanks 9. Microbes that reduce N2 to...Ch. 6 - Fill in the Blanks 10. A student observes a...Ch. 6 - Fill in the Blanks 11. Chemolithotrophs acquire...Ch. 6 - Prob. 1VICh. 6 - Prob. 2VICh. 6 - High temperature affects the shape of particular...Ch. 6 - Support or refute the following statement:...Ch. 6 - Explain quorum sensing, and describe how it is...Ch. 6 - Why must media, vessels, and instruments be...Ch. 6 - Why is agar used in microbiology?Ch. 6 - What is the difference between complex media and...Ch. 6 - Draw and label the four distinct phases of a...Ch. 6 - If there are 47 cells in 1 l of sewage, how many...Ch. 6 - Prob. 9SACh. 6 - Prob. 10SACh. 6 - Explain the differences among photoautotrophs,...Ch. 6 - Contrast the media described in Tables 6.3 and 6.4...Ch. 6 - How does a chemostat maintain a constant...Ch. 6 - A scientist describes an organism as a...Ch. 6 - Pasteurization is a technique that uses...Ch. 6 - Two cultures of a facultative anaerobe are grown...Ch. 6 - Some organisms require riboflavin (vitamin B2) to...Ch. 6 - A scientist inoculates a bacterium into a complex...Ch. 6 - How can regions within biofilms differ in their...Ch. 6 - A scientific article describes a bacterium as an...Ch. 6 - Prob. 8CTCh. 6 - Prob. 9CTCh. 6 - Starting with 10 bacterial cells per milliliter in...Ch. 6 - Suppose you perform a serial dilution of 0.1-ml...Ch. 6 - How might the study of biofilms benefit humans?Ch. 6 - The filamentous bacterium Beggiatoa gets its...Ch. 6 - Given that Haemophilus ducreyi is a...Ch. 6 - Examine the graph in Figure 6.3. Note that the...Ch. 6 - Prob. 16CTCh. 6 - Using the terms in Figure 6.8a, describe the...Ch. 6 - Prob. 18CTCh. 6 - Prob. 19CTCh. 6 - Prob. 20CTCh. 6 - Prob. 21CTCh. 6 - Prob. 22CTCh. 6 - Viable plate counts are used to estimate...Ch. 6 - Prob. 1CM
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
- Which of the following would you most expect to find in a fecal contaminated water sample? Gram-negative bacteria Mycorrhizal fungi Traces of ONPG and MUG Bacteria in staphylococcus arrangementarrow_forwardplacing bacteria at ultracold temperatures is as effective at killing microbes as the use of dry heat in incineration. is is true/false?arrow_forwardDuring media preparation, you observed that the agar medium did not solidify after sterilization even after incubating it for 1 hour at room temperature. What could be the reason behind this?arrow_forward
- Agar is a complex polysaccharide obtained from seaweed and cannot be digested by most microorganisms. Why does this property make agar an excellent solidifying agent for microbiological media?arrow_forwardA sample must contain many microbial cells for any to be seen by microscopic examination. Why?arrow_forwarda food sample with an unknown number of contaminating bacteria was serial diluted to 10-6. the 10-6 plate contained 96 colonies. What was the original microbial concentration? Show your work.arrow_forward
- Which of these microbial structures is the most difficult to kill when attempting to sterilize instruments? bacterial spores Mycobacterium pneumoniae protozoal cysts fungal sporesarrow_forwardIf you spill a culture, how should you proceed in a microbiology lab?arrow_forwardOf what practical importance are air borne microorganisms to the laboratory workers? What precautions should be taken to control laboratory contaminants? Why are petri dishes incubated in an inverted position? Of what advantage is the using a solid and a liquid medium?arrow_forward
- Your instructor asks you to isolate and identify the organisms in an unknown culture. You find that the culture contains two gramnegative bacilli that produce swarming colonies. What biochemical test would you use to identify the bacilli? Justify your answer.arrow_forwardA novice microbiology student incorrectly explains that immersion oil increases the magnification of his microscope. What is the function of immersion oil?arrow_forwardWhy is it desirable that most cultures be inspected after 15 to 18 hours of incubation?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Bacterial Structure and Functions; Author: Osmosis;https://www.youtube.com/watch?v=b15Hy3jCPDs;License: Standard youtube license