OG-12-132（哪位好心人抽点时间帮我解释一下）

小福娃欢欢

132. According to the passage, which of the following best describes a function performed by oligosaccharins?
(A)    Regulating the daily functioning of a plant’s cells
(B)    Interacting with one another to produce different chemicals
(C)    Releasing specific chemical messengers from a plant’s cell walls
(D)    roducing the hormones that cause plant cells to differentiate to perform different functions
(E)    Influencing the development of a plant’s cells by controlling the expression of the cells’ genes
Supporting ideas
To answer this question, look for information that is provided in the passage. Oligosaccharins are regulatory molecules (line 13). they form part of the complex system that turns on, or expresses, a small subset of genes in a particular kind of cell. As explained in the first paragraph, this process allows plant cells to differentiate and form different plant structures. Unlike the five major plant hormones, the oligosaccharins affect a specific aspect of the plant’s growth (lines 14–17).
A ~e passage does not discuss the daily functioning of a plant’s cells.
B    ~e passage provides no evidence of this interaction.
C ~e oligosaccharins are fragments of the cel
wal (line 39) and the specific chemical
messengers from the cel wal (lines 43–44).
D ~e oligosaccharins are not said to produce
hormones.
E    Correct. Oligosaccharins are part of the system that turns on, or expresses, the subset of a cell’s genes that allows cells to grow into different plant structures.
~e correct answer is E.

我了解文章的大意，五种hormones 和 另外一个叫 Oligosaccharins 的分子作比较。反正说五种hormones是多功能的，而Oli是specific 的。其他就没看出来还有什么功能。
另外文章开头几句话有点不明白，有个版本的解释说，
The answer is that only a small subset of the genes in a particular kind of cell are expressed, or turned on, at a given time 是主旨句，全文讨论的中心，可知文章应为结论解释型。我没看出来这句话和五种hormones 和 Oli 的分子有什么关系啊

对于这题OG中的官方解释我也没看懂they form part of the complex system that turns on, or expresses, a small subset of genes in a particular kind of cell. As explained in the first paragraph, this process allows plant cells to differentiate and form different plant structures.这句话难道是说Oli的功能的吗？

糊涂了，请高人指点迷津，谢谢

小福娃欢欢

谢谢你的解释，我在好好研究研究。
我能否在问问，你是第几遍OG阅读了，我刚完成一遍，基本没什么感觉的做，就是错错错。
现在准备开始第二遍OG，你在第二遍复习中总结过什么吗？或者有什么办法来提高阅读？
还有，除了OG阅读，你还做了那些阅读？
好像问题多了点，谢谢

小福娃欢欢

谢谢你的解释，我在好好研究研究。
我能否在问问，你是第几遍OG阅读了，我刚完成一遍，基本没什么感觉的做，就是错错错。
现在准备开始第二遍OG，你在第二遍复习中总结过什么吗？或者有什么办法来提高阅读？
还有，除了OG阅读，你还做了那些阅读？
好像问题多了点，谢谢

-- by 会员 小福娃欢欢 (2011/5/9 0:31:04)

不好意思消息回的慢了些哈。。
在消息里头回复了，补充一个感受。。就是我觉得总结不在多而在精。。把被虐得特别惨的文章拿出来总结，琢磨透彻，带着感受去做新题是很有效果的。。

-- by 会员 抓抓sandra (2011/5/9 2:24:39)

再问一下，那你总结的时候，有规定自己一下子要多少量吗？
因为看小安阅读法里面，貌似有个量得问题，要一下子看多少多少的。

小福娃欢欢

6楼，7楼，谢谢你们的指点。
终于搞清楚5个hormones和oli都是为了同一个目标服务的。
那么这题我能不能引申一下，其实5种荷尔蒙的也是此选项的E啊？