og-5-29

meixiapeng

这篇我搞不懂里面得关系.乱得很.是不是说histone在egg be fertilized 之后就会合成RNA啊?那文中不是说fertilized 之前就有了 substance 也就是morphogentic determinant (md)也就是 RNA吗?文中是不是想说unfertilized 的之前这中substance并不是真正意思的md啊?

真的很乱,谁能帮我理一理.到底fertilize 与synthesis有什么联系.谢谢

vincent0330

substances=RNA=Morphogentic Determant

    (1)when the egg is fertilized, the substances(RNA's) become active

+  (2) these particular RNA's direct the synthesis of histones

---

fertilization of an egg => synthesis of histone

vincent0330

以后麻烦请把原文贴出来....thanx

meixiapeng

ok,thanks,is that mean these particular RNA's  is the fertilized eggs'RNA's? how do u know before the egg is fertilized,the RNA is not the production of histones? thanks again

kinkinp

想请问一下本文中的一个句子，我想了老半天，都读不懂，

He and other biologists studying a wide variety of organisms have found that these particular RNA's direct, in large part, the synthesis of histones, a class of proteins that bind to DNA.

从found that...就开始搞不懂结构和意义了，

我的28 29题就死在这上面了。

kinkinp

想请问一下本文中的一个句子，我想了老半天，都读不懂，

He and other biologists studying a wide variety of organisms have found that these particular RNA's direct, in large part, the synthesis of histones, a class of proteins that bind to DNA.

从found that...就开始搞不懂结构和意义了，

我的28 29题就死在这上面了。

vincent0330

想请问一下本文中的一个句子，我想了老半天，都读不懂，

He and other biologists studying a wide variety of organisms have found that these particular RNA's direct, in large part, the synthesis of histones, a class of proteins that bind to DNA.

从found that...就开始搞不懂结构和意义了，

我的28 29题就死在这上面了。

these particular RNA's(主语) direct(谓语), in large part(插入语), the synthesis of histones(宾语), a class of proteins that bind to DNA(宾语同位语或是独立主格).

kinkinp

谢谢啦，我终於读懂了

swlfx

以下是引用vincent0330在2004-7-21 4:10:00的发言：

substances=RNA=Morphogentic Determant

    (1)when the egg is fertilized, the substances(RNA's) become active

+  (2) these particular RNA's direct the synthesis of histones

---

fertilization of an egg => synthesis of histone

分析的非常清楚，多谢。

langbaobao1031

substances=RNA=Morphogentic Determant

(1)when the egg is fertilized, the substances(RNA's) become active

+ (2) these particular RNA's direct the synthesis of histones

---

fertilization of an egg => synthesis of histone

 

一点儿也不清楚啊。。。。。抱歉，我想说 2里面，完全没有说明When RNA'S become active, these particular RNA's direct the synthesis of histones.   所以，楼上的1和2就完全没有逻辑联系啊！！！文章里没有任何的文字提及这个严谨的逻辑关系。

楼上的朋友说的是1推2，然后3推4。但缺少2推3啊，这和OG的解释是一样的，都是逻辑不严谨。请大家解答。

-----崩溃中。