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

在细发现另一个结构是拟核，是包含遗传物不规则形状域。

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

除了包含在拟核遗传物，许多细菌含有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.

细含有核糖体，它们是蛋白合成部位；拟核含有遗传物以及粒；粒含有赋予细菌选择性优势基因。