Which of the following bacteria functions could be acquired through lateral gene flow of plasmids?
| a. |
Production of enterotoxins |
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| b. |
Resistance to antibiotics |
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| c. |
Ability to oxidize glucose |
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| d. |
A and B are correct |
Polymyxin B is an antibiotic that binds to lipopolysaccharide. What microorganisms will be susceptible to this antibiotic?
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Gram Positive microorganisms |
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Gram Negative microorganisms |
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Gram Positive and Negative microorganisms |
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None of the above |
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Which of the following bacteria functions could be acquired through lateral gene flow of plasmids? a....
1. Like phospholipids, lipopolysaccharides have a hydrophilic head and a hydrophobic tail. True or false 2. The outer membrane of Gram negative bacteria contains lipopolysaccharides T or F 3. Biofilms and pure culture are formed by only one type of microorganism T or F 4. Any given antibiotic will have the same minimum inhibitory concentration (MIC) against any test microorganism. T or F 5. Production of antibiotics by the microorganism is not affected by the culture conditions T or F...
Which are the following are common mechanisms that may occur and result in resistance of bacteria to antibiotics? Check all that apply. Group of answer choices mutation that modifies antibiotic target prior exposure to biocides degradation or modification of antibiotic efflux or expulsion of antibiotic change from gram-positive to gram-negative cell wall
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LAB EXERCISE #6: Kirby-Bauer Disk Diffusion Test for Antibiotie Sensitivity Determination The Kirby Bauer Test is an agar diffusion test that is used to determine the effectiveness of antibiotics killing various species of bacteria. Filter paper disks saturated with the antibiotic of interest are placed a Mueller-Hinton agar plate on which bacteria that has been isolated from a clinical sample has been sarcad. The antibiotic then diffuses from the disk...
Which of the following is the easiest was for bacteria to develop antibiotic resistance? Select one: a. Mutation of a gene that regulates antibiotic resistance. b. Generate a mutation to alter the target protein. c. Acquire drug resistance genes via lateral gene transfer. d. Modify the antibiotic once it cross the bactieral membrane e. None of the choices.
QUESTION 12 Which of the following statements about genetic exchange in bacteria is NOT true? A. In conjugation there has to be a physical connection between the donor cell and the recipient cell. B. Antibiotic resistance can be transferred from one bacterial cell to another by conjugation. C. Interrupted conjugation results in the production of Hfr strains. D. Plasmids do not have to integrate into the host cell chromosome in order to be replicated. E. The order of gene transfer...
- Which of the following pairs is mismatched? d. iodine mordant e. none of the above a. alcohol-decolorizer b. crystal violet-basic dye c. safranin-acid dye 2, Suppose you Gram stained a sample from one colony and observed a field of red and blue cocci. Adjacent cells were not always the same color. You could conclude that you have d. old cells e. made a mistake a. a mixed culture b. young cells c. dividing cells 3. Which of the following...
94) The most common infectious disease's) is/are A) colds C) hepatitis. B) İnfluenza. D) gonorrhes 95) Which organism causes the highest number of sexually transmitted diseases each year? A) Treponema pallidum C) Trichomonas vaginalis B) Chlamydia trachomatis D) Neisseria gonorrhoeae 96) The ability of humans to resist a disease is called A) dormancy. B) resistance D) susceptābility. C) immunity. 97) Viral size is generally measured in A) micrometers. D) picometers. C) nanometers B) centimeters. 98) A virus that kills its...
1.When comparing ex vivo and in vivo gene therapy techniques, which of the following statements is true? A. Ex vivo therapy only relies on bacterial plasmids as vectors, whereas in vivo therapy only relies on viral vectors. B. During ex vivo therapy, the gene is transcribed (but not translated), whereas with in vivo therapy, the gene is both transcribed and translated. C. In vivo therapy typically involves the injection of a new gene directly into an individual, whereas ex vivo...
Which scientist / experiment provided the most compelling evidence to disproved Aristotle's theory of Spontaneous generation? 1) Pasteur's swan neck experiment 2) Lazzaro's mutton broth experiment 3) Redi's flask and meat experiment 4) Pasteur's flask and meat experiment Antibiotic resistance genes may be transferred from one bacteria to another by conjugation via.... 1) the sex pilus 2) porins 3) chemotaxis 4) gas vacuoles Which of the following is not true of Gram-positive bacteria? 1) Posess an outer membrane composed of...
3. Which of these antibiotics would be classified as narrow-spectrum antibiotics? grampos sneg) 4. Which of these antibiotics would be classified as broad-spectrum antibiotics? lics? (will kill both 5a. Ampicillin is a form of penicillin. If the zone of inhibition for a susceptible strain of E. coli is mm, and for a strain of S. aureus is 29 mm, which one is inhibited by the lower concentration or ampicillin? 5b. Would you need a higher dose of ampicillin to cure...