객관식
What is transferred between two bacterial cells in Hfr conjugation?
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- 1. Introduction to Microbiology3h 26m
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16. Microbial Genetics
Conjugation: Hfr & F' Cells
객관식
Hfr strains of bacteria:
A
Do not have an F plasmid.
B
Have an F plasmid.
C
Have an F factor integrated in the bacterial chromosome.
D
Have a partial F plasmid as a linear fragment in the cytoplasm.
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검증된 단계별 안내1
Understand the concept of Hfr strains: Hfr (High frequency of recombination) strains are a type of bacterial cell that have the F factor integrated into their chromosome.
Recall what an F factor is: The F factor (fertility factor) is a piece of DNA that allows bacteria to transfer genetic material through conjugation.
Differentiate between F+ and Hfr strains: F+ strains have the F plasmid as an independent circular DNA in the cytoplasm, while Hfr strains have the F factor integrated into the bacterial chromosome.
Consider the implications of integration: When the F factor is integrated into the chromosome, it allows the Hfr strain to transfer chromosomal genes to a recipient cell during conjugation.
Conclude with the correct identification: Based on the integration of the F factor into the chromosome, Hfr strains are characterized by having an F factor integrated in the bacterial chromosome.
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