Another structure found in the cytoplasm is the nucleoid which is an irregularly shaped region that contains the cell's chromosome.

在细胞中发现另一个结构是拟核，是遗传不规则形状域。

Additionally to the genetic material contained within the nucleoid, many bacteria contain extra chromosomal DNA molecules called plasmids.

除在拟核中遗传外，许多细菌有额外DNA分子，称为粒。

The cytoplasm contains ribosomes which are the site of protein synthesis, the nucleoid which contains the genetic material, and plasmids which contain genes that confer a selective advantage to the bacterium.

细胞中有核糖体，它们是蛋白合成部位；拟核有遗传以及粒；粒有赋予细菌选择性优势基因。