What distinguishes an F’ (F prime) cell from an Hfr cell?

• A. The F’ cell can no longer transfer genes through conjugation
• B. The F’ cell carries an F plasmid that has excised from the chromosome, sometimes taking chromosomal genes with it
• C. The F’ cell cannot initiate conjugation, while the Hfr cell can
• D. The Hfr cell carries an extra F plasmid, while the F’ cell does not

Answer: (B)