Question

What is the difference between an F+ donor and an Hfr donor?

The Hfr donor has an F factor, but the F+ donor does not.
The F+ donor has an F factor, but the Hfr donor does not.
The Hfr donor has an F plasmid, but the F+ donor does not.
The Hfr donor has an F factor integrated into its main chromosome, but the F+ donor does not.

Answer 1

An Hfr donor has the F factor integrated into its main chromosome, while an F+ donor does not.

Step-by-step explanation:

An Hfr donor is an E. coli cell that has the F factor integrated into its main chromosome, allowing for transfer of chromosomal DNA to the recipient cell through conjugation. On the other hand, an F+ donor is an E. coli cell that contains the F factor in the form of a plasmid but does not have it integrated into the chromosome.