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. 这题答案为什麽是A 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 只是里面有cilia ,flagella 看起来就是怪怪的 --

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