Textbook Question
Match the following examples of mutagens.
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Ch. 8 - Microbial Genetics
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398
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Table of contents
- Ch. 1 - The Microbial World and You18
- Ch. 2 - Chemical Principles20
- Ch. 3 - Observing Microorganisms Through a Microscope18
- Ch. 4 - Functional Anatomy of Prokaryotic and Eukaryotic Cells21
- Ch. 5 - Microbial Metabolism20
- Ch. 6 - Microbial Growth20
- Ch. 7 - The Control of Microbial Growth20
- Ch. 8 - Microbial Genetics19
- Ch. 9 - Biotechnology & DNA Technology20
- Ch. 10 - Classification of Microorganisms15
- Ch. 11 - The Prokaryotes: Domains Bacteria and Archaea14
- Ch. 12 - The Eukaryotes: Fungi, Algae, Protozoa, and Helminths17
- Ch. 13 - Viruses, Viroids, and Prions20
- Ch. 14 - Principles of Disease and Epidemiology21
- Ch. 15 - Microbial Mechanisms of Pathogenicity19
- Ch. 16 - Innate Immunity: Nonspecific Defenses of the Host20
- Ch. 17 - Adaptive Immunity: Specific Defenses of the Host20
- Ch. 18 - Practical Applications of Immunology20
- Ch. 19 - Disorders Associated with the Immune System19
- Ch. 20 - Antimicrobial Drugs19
- Ch. 21 - Microbial Diseases of the Skin and Eyes21
- Ch. 22 - Microbial Diseases of the Nervous System19
- Ch. 23 - Microbial Diseases of the Cardiovascular and Lymphatic Systems20
- Ch. 24 - Microbial Diseases of the Respiratory System20
- Ch. 25 - Microbial Diseases of the Digestive System20
- Ch. 26 - Microbial Diseases of the Urinary and Reproductive Systems19
- Ch. 27 - Environmental Microbiology20
- Ch. 28 - Applied and Industrial Microbiology19
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398Not the one you use?Change textbook
Chapter 8, Problem 4
Bacteria can acquire antibiotic resistance by all of the following except
a. mutation.
b. insertion of transposons.
c. conjugation.
d. snRNPs.
e. transformation.
Verified step by step guidance1
Step 1: Understand the mechanisms by which bacteria acquire antibiotic resistance. These include mutation, insertion of transposons, conjugation, and transformation.
Step 2: Review each option to determine if it is a known mechanism for acquiring antibiotic resistance: mutation (a genetic change), insertion of transposons (mobile genetic elements), conjugation (transfer of plasmids between bacteria), and transformation (uptake of free DNA from the environment).
Step 3: Identify what snRNPs are. Small nuclear ribonucleoproteins (snRNPs) are involved in RNA splicing in eukaryotic cells and are not related to bacterial antibiotic resistance mechanisms.
Step 4: Conclude that the option which does not contribute to antibiotic resistance in bacteria is the one involving snRNPs.
Step 5: Summarize that the correct answer is the option that does not fit with known bacterial resistance acquisition methods, which is snRNPs.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Mechanisms of Antibiotic Resistance Acquisition
Bacteria can gain antibiotic resistance through genetic changes such as mutations, horizontal gene transfer via conjugation, transformation, and transposon insertion. These mechanisms enable bacteria to survive antibiotic exposure by altering target sites, producing enzymes, or reducing drug uptake.
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03:49
Mechanism of Natural Transformation
Horizontal Gene Transfer in Bacteria
Horizontal gene transfer allows bacteria to exchange genetic material, spreading resistance genes rapidly. Key methods include conjugation (direct cell-to-cell transfer), transformation (uptake of free DNA), and transduction (via bacteriophages). These processes contribute significantly to antibiotic resistance dissemination.
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04:42Horizontal Gene Transfer
Role of snRNPs in Cells
Small nuclear ribonucleoproteins (snRNPs) are involved in RNA splicing within eukaryotic cells and are not related to bacterial antibiotic resistance. They function in processing pre-mRNA, making them irrelevant to bacterial gene transfer or mutation mechanisms.
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03:53Regulatory T Cells
Related Practice
Textbook Question
The following is a code for a strand of DNA.
a. Using the genetic code provided in Figure 8.8, fill in the blanks to complete the segment of DNA shown.
b. Fill in the blanks to complete the sequence of amino acids coded for by this strand of DNA.
c. Write the code for the complementary strand of DNA completed in part (a).
d. What would be the effect if C were substituted for T at base 10?
e. What would be the effect if A were substituted for G at base 11?
f. What would be the effect if G were substituted for T at base 14?
g. What would be the effect if C were inserted between bases 9 and 10?
h. How would UV radiation affect this strand of DNA?
i. Identify a nonsense sequence in this strand of DNA.
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Textbook Question
Feedback inhibition differs from repression because feedback inhibition
a. Is less precise.
b. Is slower acting.
c. Stops the action of preexisting enzymes.
d. Stops the synthesis of new enzymes.
e. All of the above
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Textbook Question
Suppose you inoculate three flasks of minimal salts broth with E. coli. Flask A contains glucose. Flask B contains glucose and lactose. Flask C contains lactose. After a few hours of incubation, you test the flasks for the presence of ß-galactosidase. Which flask(s) do you predict will have this enzyme?
a. A
b. B
c. C
d. A and B
e. B and C
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Textbook Question
Identify and mark each of the following on the portion of DNA undergoing replication: replication fork, DNA polymerase, RNA primer, parent strands, leading strand, lagging strand, the direction of replication on each strand, and the 5′ end of each strand.
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Textbook Question
Plasmids differ from transposons in that plasmids
a. become inserted into chromosomes.
b. are self-replicated outside the chromosome.
c. move from chromosome to chromosome.
d. carry genes for antibiotic resistance.
e. none of the above
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