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1. Introduction to Microbiology3h 22m
2. Disproving Spontaneous Generation1h 18m
3. Chemical Principles of Microbiology3h 38m
4. Water1h 28m
5. Molecules of Microbiology2h 23m
6. Cell Membrane & Transport3h 28m
7. Prokaryotic Cell Structures & Functions5h 52m
8. Eukaryotic Cell Structures & Functions2h 18m
9. Microscopes2h 46m
10. Dynamics of Microbial Growth4h 36m
11. Controlling Microbial Growth4h 10m
12. Microbial Metabolism5h 16m
13. Photosynthesis2h 31m
14. DNA Replication2h 25m
15. Central Dogma & Gene Regulation7h 14m
16. Microbial Genetics4h 44m
17. Biotechnology3h 0m
18. Viruses, Viroids, & Prions4h 56m
19. Innate Immunity7h 15m
20. Adaptive Immunity7h 14m
21. Principles of Disease6h 57m

16. Microbial Genetics

Conjugation: Hfr & F' Cells

Microbiology

16. Microbial Genetics

Conjugation: Hfr & F' Cells

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Multiple Choice

Hfr strains of bacteria:

Do not have an F plasmid.

Have an F plasmid.

Have an F factor integrated in the bacterial chromosome.

Have a partial F plasmid as a linear fragment in the cytoplasm.

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Verified step by step guidance

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.