Question

Which best describes a pilus? A. A tube that extends from a bacterium B. A virus that causes a common cold C. A protective shell around a bacterium D. A piece of DNA transferred by a virus

Answer 1

The correct answer is A. A tube that extends from a bacterium.

Explanation

Pilus is a term that is used to name the tubes that extend outside the membrane of a bacterium that looks like short hairs anchored to the membrane; these hairs are involved in bacterial conjugation. Sometimes these tubes serve the bacteria to adhere to the organisms in which they will be housed. So, the correct answer is A. A tube that extends from a bacterium.

Answer 2

The answer is -- A. A tube that extends from a bacterium