The bacterium doesn't have a nucleus, and in fact, they don't have very well formed organelles in general.

细菌没有细胞核,实际上,细菌没有完善的细胞器

耶鲁公开课 - 生物医学工程探索课程节选

If we think of the size of a typical atom, we would say that would be about 10 to the negative 10 meters. So, we can see the diameter of a nucleus is absolutely smaller really concentrating that mass into a very small space.

一个普通细胞的大小，抱歉，我和细胞核搞混了0,如果我们考虑，一个普通原子的大小,这大概是10的负十次方米,所以原子核的直径确实非常小,真的是把质量。

麻省理工公开课 - 化学原理课程节选

In this case the shape is - there's a cell body in the center here so this is where the nucleus is and where all the transcription, production of proteins take place here.

在这个细胞中,中间部位是细胞体,细胞核位于其中央,转录以及翻译过程均发生于此

耶鲁公开课 - 生物医学工程探索课程节选

And the nucleus name was used as an analogy to the nucleus of a cell so in some ways that makes it easier to see the connection but I think it can also be a little bit confusing for maybe 7th graders that are learning both at the same time, that this nucleus acts very different from a nucleus in a cell, although, of course, there many of them in the nucleus of a cell.

原子核这个名字的命名,是类似于细胞核,这样会让人们更容易看到两者之间的联系,但我觉得这样可能,会给正在学这两个课程的,7年级学生带来困惑，原子核的行为,和细胞核完全不同，虽然在细胞核。

麻省理工公开课 - 化学原理课程节选

They have a nucleus, they have a cell membrane, they have organelles throughout them, they have the same DNA.

它们都有细胞核,细胞膜,细胞器遍布其中,它们有相同的DNA

耶鲁公开课 - 生物医学工程探索课程节选

The nucleus contains all the DNA, and so the early stages of gene expression, transcription, happened inside the nucleus where all the DNA is.

NA都在细胞核里,所以早期的基因表达,转录,发生在将所有DNA,都包于其中的细胞核中

耶鲁公开课 - 生物医学工程探索课程节选