单选题 关于逆转录酶的叙述，错误的是 A、以单链RNA为模板 B、以单链DNA为模板 C、水解杂化双链中的RNA D、促使新合成DNA转入宿主细胞 E、能生成cDNA双链

单选题有机磷农药抑制的酶是

单选题与mRNA密码子ACG相对应的tRNA反密码子是

单选题核酸分子中的酸性基团是（ ）

单选题蛋白酶激活酶原的过程属于

单选题下列哪项不是递氢体

单选题The term "nationalism" is generally used to describe two phenomena: (1)the members of a nation care about their national identity and(2) that the members of a nation seek to achieve (or sustain) self-determination. It is traditional, therefore, to distinguish nations from states—whereas a nation often consists of an ethnic or cultural community, a state is a political entity with a high degree of sovereignty. While many states are nations in some sense, there are many nations which are not fully sovereign states. As an example, the Native American Iroquois constitute a nation but not a state, since they do not possess the requisite political authority over their internal or external affairs. If the members of the Iroquois nation were to strive to form a sovereign state in the effort to preserve their identity as a people, they would be exhibiting a state—focused nationalism. Nationalism has long been ignored as a topic in political philosophy, written off as a relic from bygone times. It has only recently come into the focus of philosophical debate. The surge of nationalism usually presents a morally ambivalent and for this reason often fascinating picture. "National awakenings" and struggles for political independence are often both heroic and inhumanly cruel; the formation of a recognizably national state often responds to deep popular sentiment, but can and does sometimes bring in its wake inhuman consequences, including violent expulsion and "cleansing" of non-nationals, all the way to organized mass murder. The moral debate on nationalism reflects a deep moral tension between solidarity with oppressed national groups on the one hand and repulsion in the face of crimes perpetrated in the name of nationalism on the other. Nationalism may manifest itself as part of official state ideology or as a popular (non-state) movement and may be expressed along civic, ethnic, cultural, religious or ideological lines. These self-definitions of the nation are used to classify types of nationalism. However, such categories are not mutually exclusive and many nationalist movements combine some or all of these elements to varying degrees. Nationalist movements can also be classified by other criteria, such as scale and location. Nationalism does not necessarily imply a belief in the superiority of one race over others, but in practice, many nationalists support racial protectionism or racial supremacy. Such racism is typically based upon preference or superiority of the indigenous race of the nation.

单选题辨认DNA复制起始点的是

单选题A．蛋白激酶C(PKC)B．鸟苷酸环化酶C．酪氨酸蛋白激酶D．腺苷酸环化酶E．蛋白激酶G(PKG)

单选题关于生长因子的叙述，错误的是

单选题下列对关键酶的叙述，不正确的是

单选题人体内嘌呤核苷酸分解代谢的主要终产物是

单选题A．10 B．12 C．14 D．16

单选题以下对L-谷氨酸脱氢酶的描述，哪一项是不正确的

单选题合成肌糖原的原料是

单选题哪一种物质是甲状腺素的衍生物(　　　)

单选题不属于转录后修饰的是

单选题A．白蛋白B．α球蛋白C．β球蛋白D．γ球蛋白

单选题1mol甘油彻底氧化可以净产生多少个ATP

单选题若用重金属沉淀pI为8的蛋白质时，该溶液的pH值应为（）。