[討論]OG Passage12-biology

[撥撥]

er.....
是這樣選出來的喔???
這....
恩... 不過還是感謝啦~

69. The passage suggests that which of the following is a function likely to be performed by an oligosaccharin?

(A) To stimulate particular plant cell to become part of a plant’s root system
(誠如best大大所述oligo是產生specific的效果)
(B) To stimulate the walls of a particular cell to produce other oligosaccharins
(第四段：enzymes ==> oligo)
(C) To activate enzymes that release specific chemical messengers from plant cell walls
(第四段：enzymes ==> oligo，選項中有點倒因為果)
(D) To duplicate the gene complement in a particular plant cell
(文章沒說會duplicate)
(E) To produce multiple effects on a particular subsystem of plant cells
(oligo=>只有specific effect不會有multiple effects)

參考看看囉∼

[davidslin]

(恕刪)

(35) Such a hierarchy may also exist in plants. Oligosac-
charins are fragments of the cell wall released by
enzymes: different enzymes release different oligosac-
charins. There are indications that pleiotropic plant
hormones may actually function by activating the
(40) enzymes that release these other, more specific chemical
messengers from the cell wall.

總結:enzyme=>oligo ,enzyme=>hormones Therefore we know hierarchy may also exist in plants.

(恕刪)

我覺得應該是hormones=>enzyme=>oligo耶
因為71題解釋第六行說...the pleiotropic plant hormones activate enzymes, which in turn release oligo.........
是這樣嗎? 還是我誤解了?

[aboutwhate]

請問一下第71題答案E，是從文章哪裡看出來的？
看了好幾遍都看不出明確指出E選項的地方[tab]

[haijung]

同上疑問~~ 請問Q71的E是從哪裡推出來的~ 謝謝~~

[larry.tw]

Q71
同OG11-121
121. 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)Producing 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

這題定位oligosaccharins容易找到L13 or 最後一段....
但E真的很難選阿,有誰可以解釋一下嗎?
還有C選項我覺得沒錯阿,就是最後一段的內容,還是我哪裡誤解了??

[larry.tw]

推一下~~~無解中

[charlie6989]

Q71

同OG11-121

121. 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)Producing 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



這題定位oligosaccharins容易找到L13 or 最後一段....

但E真的很難選阿,有誰可以解釋一下嗎?

還有C選項我覺得沒錯阿,就是最後一段的內容,還是我哪裡誤解了??

C:. . There are indications that pleiotropic plant hormones may actually function by activating the enzymes that release these other, more specific chemical messengers from the cell wall.
從這句可排除C
致於E怎推出How then can these cells differentiate and form structures as different as roots, stems, leaves, and fruits? 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
先是描述為何有這些差異性,說是only a small subset of the genes在一個 particular kind of cell are expressed所得出,接下來This is accomplished by a complex system of chemical messengers that in plants include hormones and other regulatory molecules明確的說出其作用