蛋白质工程是利用基因工程的方法对蛋白质进行改造,下列各项措施中,不正确的是 [

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问题:

蛋白质工程是利用基因工程的方法对蛋白质进行改造,下列各项措施中,不正确的是 [ ]

A.根据氨基酸的性质和特点,设计并制造出自然界不存在的全新蛋白质

B.在蛋白质分子中替代某一个肽段或一个特定的结构区域

C.通过基因工程中定点诱变技术,有目的地改造蛋白质分子中某些活性部位的一个或几个氨基酸,以改善蛋白质的性质和功能

D.利用化学合成的方法对蛋白质分子的某一氨基酸进行修饰,以改善蛋白质性质和功能

考点:蛋白质工程的崛起
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在CAD中,可采用鼠标二中键滚轮代替图标菜单中的()和()操作。

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Some consumer researchers distinguish (1) "rational" motives and "emotional" (or "non-rational") motives. They use the term "rationality" (2) the traditional economic sense that assumes (3) consumers behave rationally when they carefully consider all alternatives (4) choose those that give them the greatest utility (i.e., satisfaction). (5) a marketing context, the term "rationality" implies that the consumer selects goods based (6) totally objective criteria, such (7) size, weight, price, and so on. "Emotional" motives imply the selection of goods (8) to personal or subjective criteria—the desire (9) individuality, pride, fear, affection or status.
The assumption underlying this distinction is (10) subjective or emotional criteria do not maximize utility or satisfaction. (11) , it is reasonable to assume that consumers always attempt to select alternatives that, (12) their view, serve to maximize satisfaction. Obviously, the assessment of satisfaction is a very personal process, based (13) the individual’s own needs as (14) as on past behavioral, social, and learning experiences. What may appear (15) irrational to an outside observer may be perfectly rational (16) the context of the consumer’s own psychological field. For example, a product purchased to enhance one’s self-image (such as a fragrance) is a perfectly rational form of consumer behavior. (17) behavior did not appear rational to the person who undertakes it (18) the time that it is undertaken, obviously he or she would not do it. (19) the distinction between rational and emotional motives does not appear to be warranted.
Some researchers go so far (20) to suggest that emphasis (21) "needs" obscures the rational, or conscious, nature of most consumer motivation. They claim that consumers act consciously (22) maximize their gains and minimize their losses; that they act not (23) subconscious drives but from rational preferences, (24) what they perceive to be (25) their own best interests.

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