Podcast
Questions and Answers
A researcher is studying a bacterial population and observes that some bacteria are incorporating new genetic material from their surroundings. Which mechanism of genetic transfer is most likely responsible for this?
A researcher is studying a bacterial population and observes that some bacteria are incorporating new genetic material from their surroundings. Which mechanism of genetic transfer is most likely responsible for this?
- Transformation, the uptake of free DNA from the environment. (correct)
- Conjugation, which involves direct contact between bacterial cells.
- Transposition, where mobile genetic elements move within a genome.
- Transduction, mediated by bacteriophages transferring genetic material.
A scientist discovers a new bacterial strain that exhibits unusually high antibiotic resistance. Further analysis reveals that the resistance genes are located on a plasmid. Which process could have most likely introduced these genes into the bacterial strain?
A scientist discovers a new bacterial strain that exhibits unusually high antibiotic resistance. Further analysis reveals that the resistance genes are located on a plasmid. Which process could have most likely introduced these genes into the bacterial strain?
- Transformation, which requires a bacteriophage to transfer DNA.
- Mutation, a spontaneous change in the bacterial chromosome.
- Transposition, involving the movement of DNA segments within the same cell.
- Conjugation, the transfer of genetic material between bacterial cells via direct contact. (correct)
In a laboratory experiment, bacterial cells are infected with a bacteriophage. After lysis, the newly released phages transfer genetic material from the first bacterial cells to a second population of bacterial cells. What is this process called?
In a laboratory experiment, bacterial cells are infected with a bacteriophage. After lysis, the newly released phages transfer genetic material from the first bacterial cells to a second population of bacterial cells. What is this process called?
- Transduction (correct)
- Transformation
- Transposition
- Conjugation
Mobile genetic elements known as transposons are capable of moving from one location to another within a bacterial chromosome or even to a plasmid. What is the process called?
Mobile genetic elements known as transposons are capable of moving from one location to another within a bacterial chromosome or even to a plasmid. What is the process called?
Which of the following mechanisms of genetic transfer in bacteria requires direct physical contact between the donor and recipient cells?
Which of the following mechanisms of genetic transfer in bacteria requires direct physical contact between the donor and recipient cells?
A bacterial cell acquires resistance to an antibiotic after incorporating a DNA fragment from its environment. This fragment originated from a dead bacterium. Which mechanism of genetic transfer explains this phenomenon?
A bacterial cell acquires resistance to an antibiotic after incorporating a DNA fragment from its environment. This fragment originated from a dead bacterium. Which mechanism of genetic transfer explains this phenomenon?
A scientist is studying a bacterial population and notices genetic changes occurring after infection with a bacteriophage. The changes involve the transfer of DNA from one bacterium to another via the phage. What is the name of this mechanism?
A scientist is studying a bacterial population and notices genetic changes occurring after infection with a bacteriophage. The changes involve the transfer of DNA from one bacterium to another via the phage. What is the name of this mechanism?
Which process involves the movement of a mobile genetic element to various locations within the bacterial genome, potentially causing mutations or changes in gene expression?
Which process involves the movement of a mobile genetic element to various locations within the bacterial genome, potentially causing mutations or changes in gene expression?
A researcher isolates a bacterial strain that contains a new plasmid. Upon further investigation, it is discovered that the plasmid was transferred from another bacterium through direct contact. What mechanism of genetic transfer is responsible for this observation?
A researcher isolates a bacterial strain that contains a new plasmid. Upon further investigation, it is discovered that the plasmid was transferred from another bacterium through direct contact. What mechanism of genetic transfer is responsible for this observation?
How does transduction differ fundamentally from transformation and conjugation in bacterial genetics?
How does transduction differ fundamentally from transformation and conjugation in bacterial genetics?
Flashcards
Conjugation
Conjugation
The transfer of genetic material between bacterial cells by direct cell-to-cell contact or through a bridge-like connection.
Transformation
Transformation
The genetic alteration of a cell resulting from the direct uptake and incorporation of exogenous genetic material (DNA) from its surroundings through the cell membrane(s).
Transduction
Transduction
The process by which foreign DNA is introduced into a cell by a virus or viral vector.
Transposition
Transposition
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Bacterial Genetics
Bacterial Genetics
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Study Notes
- Professor Zach Murphy will lecture on bacterial genetics.
- The lecture covers conjugation, transformation, transduction, and transposition.
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