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One of the most obvious things about a red blood cell is it doesn't have nucleus, it has no nucleus.
红细胞最为明显的不同就是,它是无核的,它没有细胞核
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Many steroid hormones act because they bind to cellulars - to receptors that are deep within the cell, often inside the nucleus.
许多类固醇激素能够起效是因为,其与存在于细胞内部的受体相结合,这类受体通常在细胞核内
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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。
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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
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A human cell shown here on the opposite side has these formed organelles that I talked about a minute ago, mitochondria, Golgi, endoplasmic reticulum, nucleus.
另一边展示的是人类细胞,它带有我一分钟前讲过的成形的细胞器,线粒体,高尔基体,内质网,细胞核
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Why don't bacteria need a distinct nucleus and that's necessary in a human cell?
为什么细菌不需要单独的细胞核,而对人类细胞则为必需
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You took biology in high school, you learned the names of these organelles and their principle functions, the nucleus, the endoplasmic reticulum, the Golgi apparatus, mitochondria, lysosomes.
你们高中学过生物,学过这些细胞器的名称,和基本功能,细胞核,内质网,高尔基体,线粒体,溶酶体
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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
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A small molecule gets produced by cells in one part of the body, circulates in the blood, estrogen enters cells, and sometimes that estrogen is able to penetrate deep within the cell, even into the nucleus.
雌激素是由身体某部分细胞分泌的,随着血液循环进入细胞,有时雌激素能够进入到细胞内部,甚至进入到细胞核内
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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。
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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
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If I looked inside it has the same kinds of components inside, it has the same DNA inside the nucleus.
深入剖析的话,它们有同样的构成元件,细胞核里同样有DNA
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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
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Some of them are changes in the - not the sequence of DNA, not the sequence of nucleotides in the DNA but the chemistry of DNA around that the way that it's packed into a nucleus.
某些改变不是发生在DNA序列上,不是在DNA的核苷酸序列上,而是发生在DNA包装进细胞核的,一系列化学变化中
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