※ 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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