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

在细胞质中发现另一个结构，包含物质不规则形状域。

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

除了包含在中物质外，许多细菌含有额外DNA分子，称为质粒。

3.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.

细胞质中含有糖体，它们蛋白质合成部位；含有物质以及质粒；质粒含有赋予细菌选择性优势基因。