What is the protein tube used to pass DNA from one bacterium to another during conjugation?

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Multiple Choice

What is the protein tube used to pass DNA from one bacterium to another during conjugation?

Explanation:
DNA transfer during bacterial conjugation happens through a protein tube called a pilus, often the sex pilus. This hair-like structure is produced by the donor cell and forms a mating bridge to the recipient, bringing the two cells into contact and enabling transfer of a DNA copy (usually a plasmid like the F factor) from donor to recipient. The other options aren’t involved in this direct DNA transfer: the flagellum is for movement, the capsule is a protective outer layer, and the cell wall is the rigid structure surrounding the cell.

DNA transfer during bacterial conjugation happens through a protein tube called a pilus, often the sex pilus. This hair-like structure is produced by the donor cell and forms a mating bridge to the recipient, bringing the two cells into contact and enabling transfer of a DNA copy (usually a plasmid like the F factor) from donor to recipient. The other options aren’t involved in this direct DNA transfer: the flagellum is for movement, the capsule is a protective outer layer, and the cell wall is the rigid structure surrounding the cell.

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