試題詳解

30. Which of the following best describes the function or characteristic of colicins?
(A) Colicins are enzymes secreted by bacteria to degrade host DNA during infection.
(B) Colicins are antimicrobial proteins produced by bacteria to kill or inhibit closely related bacterial strains.
(C) Colicins are RNA molecules that regulate gene expression in bacterial populations.
(D) Colicins are structural proteins involved in the formation of bacterial pili during conjugation.
(E) Colicins are lipopolysaccharides that form part of the bacterial outer membrane.