Question

multiple choice question

what is the name of the specialized plasmid that directs conjugation in gram-negative cells?

lac operon
pilus factor
lambda
f factor

Explanation:

Identify the process and plasmid type

Bacterial conjugation in gram-negative cells is directed by a specialized plasmid known as the fertility factor, commonly abbreviated as the F factor.

Evaluate the given options

• lac operon: A gene system involved in lactose metabolism, not a plasmid.
• pilus factor: A descriptive term, but not the formal name of the plasmid itself.
• lambda: A bacteriophage (virus), not a conjugation plasmid.
• F factor: The correct scientific term for the fertility plasmid that carries genes for conjugation and pilus formation.

Answer:

• (A) lac operon
• (B) pilus factor
• (C) lambda
• (D) F factor (Correct answer)