問一題關於後西生物 - 考試

By Puput
at 2012-06-19T13:44

Table of Contents

In E. coli mating system, Hfr type could be a genetic donor and F- could be a
genetic recipient. After the mating between
Hfr and F- type cells, the F- recipient _____.
(A) becomes Hfr (B) becomes H+ (C) becomes F- (D) gets episome (E) remains F-

Ans. E

我的問題是如果在長時間下原本的F-不也是可以轉變成Hfr嗎?

請問我哪裡想法有問題? 麻煩各位了

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Tags: 考試

All Comments

By Eden
at 2012-06-23T08:42

我選C = = c和e到底差在哪???

By Susan
at 2012-06-24T17:53

選C+1

By Elvira
at 2012-06-27T21:37

先回答1,2F的問題. 這個問題比較像考英文語意的了解

By Ethan
at 2012-06-28T05:06

先確定一件事情,那就是F(-)經過Hfr交配之後,並不會

By Isabella
at 2012-06-29T11:08

變成F(+),原因請強者補上,我是個只記結果的小峱峱

By Charlie
at 2012-07-02T14:47

所以F(-) still mains F(-). 假如選C

By Audriana
at 2012-07-04T23:05

F(-) becomes F(-) .則語意不通.

By Elma
at 2012-07-05T18:38

我記得F factor之後好像會分解掉，所以還是F(-)

By Delia
at 2012-07-08T21:14

我打錯字了是remains

By Madame
at 2012-07-09T17:51

我覺得(c)原本是想寫becomes F+吧? 我選e，不過感覺ce都ok

By Bethany
at 2012-07-10T07:41

Hfr是F+ plasmid併入整個chromosome後再隨機切開，複製到

By Puput
at 2012-07-12T19:00

F- recipient裡，而且也會隨機就切斷，不會整串複製完

By Harry
at 2012-07-14T05:20

然後留在F-裡的新複製段又會隨機選一段併入chromosome

By Audriana
at 2012-07-16T03:25

剩下的分解掉...所以F- recipient不一定會收到F質體後變F+

By Liam
at 2012-07-18T12:27

比起從F+轉移F質體到F-的情況，Hfr讓對方變F+的機率比較低

By Isabella
at 2012-07-20T15:07

以上推測|||b 我選e是因為好像在campbell看過題目那句話..

By Olga
at 2012-07-20T22:58

可惡!當初指考慮AC的說!結果都是錯的!!

By Jessica
at 2012-07-24T12:49

我自己是覺得Hfr, F+, F-都有可能所以當時就...= =a

By Freda
at 2012-07-25T16:23

推l大,我也是覺得很多可能,所以我選了D,夠大膽了吧!!^^

By Thomas
at 2012-07-25T23:38

長時間下有可能得到Hfr或F+,當然也有可能失敗而繼續保

By Carol
at 2012-07-27T15:16

留原來的F-所以我是納悶這提示該從哪裡看出它是失敗的

By Emma
at 2012-07-28T08:21

而保留原的的F- (episome不是等於質體??)

By William
at 2012-07-29T19:57

大概是保留F-的機率高吧= =? 選擇題就是只能選最佳解啊orz

By Caroline
at 2012-08-01T03:04

嗯嗯了解感謝Chagrin解說^^(我想也是這樣)

By Ivy
at 2012-08-05T14:31

我的意思是指至少它會GET plasmid

By Brianna
at 2012-08-08T20:02

個人的印象是，DONOR斷開DNA進行滾輪式複製的地方位於

By Harry
at 2012-08-09T05:11

F plasmid的中間，要F+整個基因體都送到F-，才能帶入

By Bethany
at 2012-08-12T00:10

完整的F plasmid

By Victoria
at 2012-08-12T07:00

I大我了解那種感覺有時候就會選最不可能的那個XD 呵

By William
at 2012-08-16T20:04

長時間接合作用下F(-)仍可能會變成F(+)或Hfr，但題目並

By Ophelia
at 2012-08-20T08:00

無標明時間，因此選擇最常見的型態，remain F(-)應該會
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