[求助]OG5-28 汇总中没有解答，请求帮助

shanj

问个大家都不会做错的题，我确实是不明白 C 怎么不行？  而且请xdjm帮忙翻译下划线黑体部分。

Studying sea urchins, biologist Paul Gross found

that an unfertilized egg contains substances that func-

tion as morphogenetic determinants. They are located

in the cytoplasm of the egg cell; i.e., in that part of the

(30) cell’s protoplasm that lies outside of the nucleus. In the

unfertilized egg, the substances are inactive and are not

distributed homogeneously. When the egg is fertilized,

the substances become active and, presumably, govern

the behavior of the genes they interact with. Since the

(35) substances are unevenly distributed in the egg, when the

fertilized egg divides, the resulting cells are different

from the start and so can be qualitatively different in

their own gene activity.

The substances that Gross studied are maternal

(40) messenger RNA’s --products of certain of the maternal

genes. 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. Once synthesized, the

(45) histones move into the cell nucleus, where section of

DNA wrap around them to form a structure that resem-

bles beads, or knots, on a string. The beads are DNA

segments wrapped around the histones; the string is the

intervening DNA. And it is the structure of these beaded

(50) DNA strings that guides the fate of the cells in which

they are located.

28. It can be inferred from the passage that the initial production of histones after an egg is fertilized takes place

(A)   in the cytoplasm

(B)   in the maternal genes

(C)   throughout the protoplasm

(D)  in the beaded portions of the DNA strings（A）

(E)   in certain sections of the cell nucleus

[此贴子已经被作者于2006-9-29 17:22:20编辑过]

shanj

真的那么不值得回答吗？

cx1205

是不是a啊 好象那些h是由那些substance产生,而黑字前面说那些substance is in the cy....中

我也看的不是很懂

[此贴子已经被作者于2006-9-27 10:59:59编辑过]

shanj

谢谢你，那个我也看见了，只是不理解

They are located
  in the cytoplasm of the egg cell; i.e., in that part of the
     

(30) cell’s protoplasm that lies outside of the nucleus

这句怎么理解阿？

[此贴子已经被作者于2006-9-27 17:12:50编辑过]

bolodong

帮顶，这是阅读的最好全文贴出阿，还有字小些了，好占屏幕

wldragon6

我也刚看到这篇文章，我觉得是不是这样翻译：他们是在卵细胞的C里，也就是说（ie）是在细胞P的部分里，这个P是在细胞核的外部。

翻译完后根本不知道什么意思，呵呵，我的水平实在是有限，最好能参考大牛的翻译。