Microbiology: An Evolving Science (Fourth Edition)
Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 3.3, Problem 1TQ
Summary Introduction

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The by using which the bacteria develops mutation that makes the bacteria vancomycin-resistant.

Introduction:

Resistance is defined as the capability (either genetic or natural) of an organism of repelling or avoiding the effect resulted from the invasion of biotic agents. It can also be known as the ability of an organism to withstand the effects of the biotic agents. Antibiotic-resistance means the capability of an organism to withstand the effect of the antibiotic.

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10) If the bacterium Staphylococcus aureus experiences a cost for maintaining one or more antibiotic- resistance genes, what would happen in environments that lack antibiotics? A) These genes would be maintained in case the antibiotics appear. B) These bacteria would be outcompeted and replaced by bacteria that have lost these genes. C) These bacteria would try to make the cost worthwhile by locating and migrating to microenvironments where traces of antibiotics are present. D) The number of genes conveying antibiotic resistance would increase in these bacteria. 11) When nonrandom mating occurs in a population so that individuals prefer to mate with similar individuals, allele frequencies should A) remain the same, but homozygotes will be overrepresented in the population. B) remain the same, but heterozygotes will be overrepresented in the population. C) change and heterozygotes will be overrepresented in the population. D) change and homozygotes will be overrepresented in the…
An antimicrobial drug binds to the HIV reverse transcriptase enzyme, preventing it from working. Which of the following is true of this drug?     It would inhibit early replication steps of some viruses, but not affect normal eukaryotic cell activity.     It would directly interfere with translation of some viral proteins and some eukaryotic proteins.     It would block assembly/maturation steps of some viruses, and interfere with translation in eukaryotic cells.     It would interfere with release of newly formed viruses from a host cell, but not affect eukaryotic cells.     It would interfere with protein synthesis in bacteria, but not affect eukaryotic ribosomes.     It would interfere with mRNA transcription in bacteria and viruses, but not affect eukaryotic transcription.
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USMLE-Rx Antimicrobial Therapy; Author: USMLE-Rx;https://www.youtube.com/watch?v=Pka1Ynlrqtw;License: Standard Youtube License