Re: [生物] 關於這一題?
※ 引述《l17 (國立中山大學)》之銘言：
: Which of the following characteristics is not associated with allosteric
: regulation of an enzyme's activity?
: A) A molecule mimics the substrate and competes for the active site.
: B) A naturally occurring molecule stabilizes a catalytically active
: conformation.
: C) Regulatory molecules bind to a site remote from the active site.
: D) Inhibitor and activator molecules may compete with one another.
: E) The enzyme usually has a quaternary structure.
: 這題答案為什麼是A
a是指會有和substrate相似之物質與substrate互相競爭與enzyme結合
但是異位調控顧名思義就是在不同的位置調控enzyme的活性
而這個調控物質有可能是enzyme本身的產物也可能不是
: The symptoms of a certain inherited disorder in humans include respiratory
: problems and, in males, sterility.
: Which of the following is a reasonable
: hypothesis for the molecular basis of this disorder?
: A) a defective enzyme in the mitochondria.
: B) defective actin molecules in cellular microfilaments
: C) defective dynein molecules in cilia and flagella
: D) abnormal hydrolytic enzymes in the lysosomes
: E) a defective secretory protein
: 答案是C 只是裡面有cilia ,flagella 看起來就是怪怪的
dynein是cilia和flagella裡的一個對於纖毛和鞭毛移動非常重要的一個蛋白
呼吸疾病有可能是因為cili無法活動 無法利用cilia擺動排掉異物
而sterity可能是因為經子flagella無法活動導致不孕
以上是小弟的小小見解 希望對你有幫助....m(_ _)m
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※ 編輯: liholan 來自: 120.97.73.229 (11/10 12:17)
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