Microbiology with Diseases by Body System (4th Edition)
4th Edition
ISBN: 9780321918550
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 6MC
Which of the following is true of Svedbergs?
- a. They are not exact but are useful for comparisons.
- b. They are abbreviated “sv.”
- c. They are prokaryotic in nature but exhibit some eukaryotic characteristics.
- d. They are an expression of sedimentation rate during high-speed centrifugation.
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Students have asked these similar questions
The following table depicts characteristics of five prokaryotic species (A-
E). Use the information in the table to answer the following question.
Trait
Species A
Species B
None
Species C
R
Species D
Species E
None
Plasmid
Gram Staining Variable
Results
Nutritional
Mode
Variable
Negative
Negative
Negative
Chemohete ro- Chemohete ro- Photoauto-
troph
Anaerobic
butanolic
fermentation
Chemohete ro- Chemoauto-
troph
Aerobic
methanotroph methanogen
(obtains carbon
and energy
from methane)
troph
Anaerobic
troph
Anaerobic
lactic add
fermentation
troph
Anaerobic
nitrogen
fixation and
aerobic
photosystems
I and II
Thylakoids
Specialized
Metabolic
Pathways
Other Features Fimbriae
Intemal
Flagellum
Pili
membranes
Which two species should have much more phospholipid, in the form of
bilayers, in their cytoplasms than most other bacteria?
species B and E
species C and D
O species A and C
O species A and B
We will perform a gram stain on our samples, so be sure to bring your instructions on gram staining.
Will this procedure stain all cells?
A. Yes, all prokaryotic and eukaryotic cells will be stained purple or pink.
B. All prokaryotic cells will be stained.
Eukaryotic cells will not be stained.
C.Mycobacteria and a few other groups with special cell wall structures will not be stained.
All other prokaryotic cells will be stained.
Eukaryotic cells will be stained pink.
D. Mycobacteria and a few other groups with special cell wall structures will not be stained.
All other prokaryotic cells will be stained.
Eukaryotic cells will be stained purple.
A bacterium has the following characteristics: I. It adheres to the human intestinal lining using a feature that protects it from phagocytes , bacteriophages, and dehydration. II. It can survive being boiled. III. It contains no plasmids and relatively little peptidoglycan. Which of the following characteristics allows this bacteria to survive in a human who is taking penicillin pills?
A. gram-negative cell wall
B. peptidoglycan in the cell wall
C. lipopolysaccharides in the cytoplasm
D. long polypeptides in the cell wall
Chapter 3 Solutions
Microbiology with Diseases by Body System (4th Edition)
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 - 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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- Imagine that you discover a new type of bacteria in an environment that is exposed to oxygen. A. What type of bacteria might you have discovered? B. Propose a mechanism by which they can produce the energy neededarrow_forwardWhich of the following is NOT true about gram-positive and gram-negative bacteria? a. None of the other four answers (all are true) b. Gram-negatives have thicker cell walls than gram-positives c. Cell walls are made of peptidoglycan in both gram-positives and gram-negatives d. Peptidoglycan has a carbohydrate (NAG/NAM) backbone cross-linked by chains of amino acids e. Gram-negatives have an outer membrane outside of the cell wall, composed of lipopolysaccharidearrow_forwardWhich of the following statement about the bacterial cell wall is INCORRECT? a. The cell wall is relatively nonpermeable and restricts the passage of sugars and amino acids. b. Gram-positive cells have more peptidoglycan in theircell walls than Gram-negative cells. c. Gram-negative cells have a membrane both inside andoutside their cell walls. d. The cell wall establishes a bacterium’s shape as a coccus,bacillus, or spirillum.arrow_forward
- The diagram shows the growth curve of Escherichia coli in a suspension culture containing glucose and lactose. Optical density is used to measure the concentration of bacteria in the suspension culture. Use the image to answer the question. Which statement BEST supports the information in the graph? A. E. coli metabolizes lactose and glucose. B. E. coli metabolizes glucose first, then lactose. C. E. coli metabolizes lactose first, then glucose. D. E. coli metabolizes lactose and glucose at the same time.arrow_forwardGram-positive (+) and gram-negative (-) bacteria are characterized by differences in a. the cell wall: gram+ have peptidoglycan, gram– have pseudopeptidoglycan. b. the plasma membrane: gram+ have ester-linked lipids, gram–have ether-linked lipids. c. the cell wall: gram+ have a thick layer of peptidoglycan and gram– have an outer membrane. d. chromosomal structure: gram+ have circular chromosomes, gram– have linear chromosomes.arrow_forwardWhich of the following is NOT true about bacterial endospores? A. They are produced by bacteria of the genus Bacillus and Clostridium B. They are “resting cells” for survival during adverse environmental conditions C. Resistant to desiccation (drying), heat, and chemicals D. Formed by walling off one end of the bacterial cell and surrounding it with a thick spore coat E. They represent a type of reproduction because their formation results in an increase in the number of bacterial cellsarrow_forward
- A bacterium has the following characteristics:∙ It adheres to the human intestinal lining using a feature that protects it from phagocytes, bacteriophages, and dehydration∙ It can survive being boiled∙ It contains no plasmids and relatively little peptidoglycanWhich of the following characteristics allows this bacterium to adhere to the intestinal lining? Group of answer choices A. fimbriae B. pili C. an endospore D. a flagellumarrow_forwardUse the following diagram to answers the questions. A. Is this cell Gram + or Gram -? Provide 2 pieces of evidence to support your choice. B. If you are infected by this bacterium can the antibiotic be effective in killing it. Explain. C. NAME and label the structures in the diagram that could be involved in conjugation? Why conjugation is an important process for the bacteriaarrow_forwardPlease answer fastarrow_forward
- In the experiments below, different prokaryotic cells were grown in broth cultures in the presence or absence of an antibiotic (either vancomycin or polymixin) After 1 hour, cells were rinsed, and the percent of bacteria that survived was determined. According to the data, which experiment (A or B) was done with vancomycin and which was done with polymyxin? Explain your reasoning in both cases. 100 0 A Bacillus E. coli with antibiotic without antibiotic B Methanoge n 100 Bacillus E. coli Methanogenarrow_forwardEndospores : A. are a dormant form of a bacterium AND are formed by members of medically relevant groups of bacteria. B. are a form of reproduction AND are formed by members of medically relevant groups of bacteria. C. are a dormant form of a bacterium AND are involved in anaerobic respiration. D. are formed by members of medically relevant groups of bacteria AND are involved in anaerobic respiration.arrow_forwardHow do Gram-negative bacteria differ from Gram-positivebacteria?a. They are not pathogenic.b. Their peptidoglycan cell wall is thinner.c. Gram-negative bacteria cannot be Gram stained.d. They possess a single plasma membrane.e. Gram-negative bacteria do not photosynthesize.arrow_forward
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