Multiple Choice
Which mechanism of horizontal gene transfer in bacteria involves the direct transfer of DNA from one cell to another through a pilus?
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5. Genetics of Bacteria and Viruses
Bacterial Conjugation
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
A F+ bacterial cell can donate DNA to which type of bacterium?
A
An F+ bacteria
B
An F- Bacteria
C
An Hfr Bacteria
D
An R+ bacteria
Verified step by step guidance1
Understand the concept of bacterial conjugation: Bacterial conjugation is a process where genetic material is transferred from one bacterium to another through direct contact.
Identify the role of the F factor: The F factor (fertility factor) is a piece of DNA that allows a bacterium to form a pilus and initiate conjugation. An F+ bacterium contains this F factor.
Determine the recipient bacterium: An F+ bacterium can donate DNA to an F- bacterium, which lacks the F factor. This transfer can convert the F- bacterium into an F+ bacterium.
Consider other bacterial types: An Hfr bacterium has the F factor integrated into its chromosome, allowing it to transfer chromosomal DNA during conjugation. An R+ bacterium is resistant to certain antibiotics, which is unrelated to the F factor.
Conclude the correct recipient: Based on the understanding of conjugation, the correct recipient for DNA donation from an F+ bacterium is an F- bacterium.
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