EP MICROBIOLOGY:W/DISEASES BY..-MOD.ACC
5th Edition
ISBN: 9780134607894
Author: BAUMAN
Publisher: PEARSON CO
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Textbook Question
Chapter 3, Problem 13SA
What is the function of glycocalyces and fimbriae in forming a biofilm?
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Diseases that involve biofilm-producing bacteria are of serious concern. They are not as easily treated compared with those involving free-floating (or planktonic) bacteria. Explain three reasons why biofilms can be more pathogenic.
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Biofilms represent an important environmental niche.
A) How does growth on a surface differ from growth in a suspended laboratory culture? (In other words: How do biofilm-forming cultures differ from planktonic cultures)
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C) What processes regulate might regulate biofilm formation? Is quorum sensing involved and if so, how common is it?
D) Why would biofilms promote the formation of genetic variants? What are the mechanisms by which this might occur?
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Chapter 3 Solutions
EP MICROBIOLOGY:W/DISEASES BY..-MOD.ACC
Ch. 3 - Prob. 1TMWCh. 3 - In 1985, an Israeli scientist discovered the...Ch. 3 - Why is a pilus a type of fimbria, but a flagellum...Ch. 3 - Why is the microbe illustrated in Figure 3.2 more...Ch. 3 - The Big Game College sophomore Nadia is a star...Ch. 3 - When the bacterium Escherichia coli is grown in a...Ch. 3 - Prob. 6TMWCh. 3 - Why do scientists consider bacterial and archaeal...Ch. 3 - Why did scientists in the 19th and early 20th...Ch. 3 - Why do some scientists consider archaea, which are...
Ch. 3 - Why are eukaryotic glycocalyces covalently bound...Ch. 3 - Many antimicrobial drugs target bacterial cell...Ch. 3 - Colchicine is a drug that inhibits microtubule...Ch. 3 - A cell may allow a large or charged chemical to...Ch. 3 - Which of the following statements concerning...Ch. 3 - A 9 + 2 arrangement of microtubules is seen in...Ch. 3 - Which of the following is most associated with...Ch. 3 - Which of the following is not associated with...Ch. 3 - Which of the following is true of Svedbergs? a....Ch. 3 - Which of the following statements is true? a. The...Ch. 3 - Prob. 8MCCh. 3 - Bacterial flagella are ______________. a. anchored...Ch. 3 - Prob. 10MCCh. 3 - A Gram-negative cell is moving uric acid across...Ch. 3 - Gram-positive bacteria _______________. a. have a...Ch. 3 - Endospores ________________. a. are reproductive...Ch. 3 - Prob. 14MCCh. 3 - Dipicolinic acid is an important component of...Ch. 3 - Match the structures on the left with the...Ch. 3 - Match the term on the left with its description on...Ch. 3 - Label the structures of the following prokaryotic...Ch. 3 - Label each type of flagellar arrangement.Ch. 3 - A scientist who is studying passive movement of...Ch. 3 - Describe (or draw) an example of diffusion down a...Ch. 3 - Sketch, name, and describe three flagellar...Ch. 3 - Prob. 3SACh. 3 - The term fluid mosaic has been used in describing...Ch. 3 - A local newspaper writer has contacted you, an...Ch. 3 - Prob. 6SACh. 3 - Compare bacterial cells and algal cells, giving at...Ch. 3 - Contrast a cell of Streptococcus pyogenes (a...Ch. 3 - Differentiate among pili, fimbriae, and cilia,...Ch. 3 - Prob. 10SACh. 3 - Prob. 11SACh. 3 - Prob. 12SACh. 3 - What is the function of glycocalyces and fimbriae...Ch. 3 - Prob. 14SACh. 3 - Compare and contrast three types of passive...Ch. 3 - Prob. 16SACh. 3 - Prob. 17SACh. 3 - Prob. 18SACh. 3 - Prob. 1CTCh. 3 - Methylene blue binds to DNA. What structures in a...Ch. 3 - Prob. 3CTCh. 3 - Prob. 4CTCh. 3 - A researcher carefully inserts an electrode into...Ch. 3 - Prob. 6CTCh. 3 - An electron micrograph of a newly discovered cell...Ch. 3 - An entry in a recent scientific journal reports...Ch. 3 - Prob. 9CTCh. 3 - Prob. 10CTCh. 3 - Prob. 11CTCh. 3 - Prob. 12CTCh. 3 - Prob. 13CTCh. 3 - Prob. 14CTCh. 3 - Using the following terms, fill in the following...
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- What are the four basic stages of biofilm formation?arrow_forwardDescribe a microbial biofilm. Discuss why it is likely that a biofilm contains bacteria with different energy metabolisms?arrow_forwardExplain the purpose and phase where cells lose flagella and motility in biofilm formation, and why the amount of cell density is an important factor in type of bacteria where biofilm formation is triggered.arrow_forward
- How are biofilms significant to the human body and the environment?arrow_forwardWhat are the advantages of biofilms as a growthmode over a planktonic lifestyle?arrow_forwardDiseases that involve biofilm-producing bacteria are serious concern. They are not easily treated compared with those involving free-floating bacteria. Explain three reasons why biofilm formers are more pathogenic.arrow_forward
- What medical challenges do biofilms present?arrow_forwardDiseases that involve biofilm-producing bacteria are of serious concern. They are not as easily treated compared with those involving free-floating (or planktonic) bacteria. Explain three reasons why biofilm formers are more pathogenic. Brian goes to the hospital after not feeling well for a week. He has a fever of 38 °C (100.4 °F) and complains of nausea and a constant migraine. Distinguish between the signs and symptoms of disease in Brian’s case.arrow_forwardWhat functions do endospores have in the proliferation, dispersal and survival of bacteria? Please explain.arrow_forward
- Which of the following is not true about biofilms a) are caused by many Gram positive and Gram negative bacteria as well as algae and fungi b) are highly contagious c) are hard to treat due to impermeability to drugsarrow_forwardWhich of the following is correct about biofilms? O 1) They are comprised only of psychrophiles. O 2) They are more sensitive to changes in growth conditions than planktonic cells O 3) Quorum sensing allows the biofilm community to behave differently than planktonic organisms 4) Biofilms only form within the environment. 5) Pure cultures are necessary for biofilm formation.arrow_forwardInfections among hospitalized patients are often related to the presence of a medical device in the patient. Which conditions favor the formation of biofilms on in-dwelling catheters?arrow_forward
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