有一对氢键连接的脱氧核苷酸，已查明它的结构中有一个腺嘌呤，则它的其他组成是

试卷相关题目

• 1下列有关对生命系统的叙述中，正确的是

  A.生命系统的每个层次都是“系统"，能完整表现生命活动的最基本的“生命系统"是“细胞"

  B.蛋白质和核酸等生命大分子本身也可算作“系统"，也属于“生命系统"的层次

  C.“生态系统’’是生命系统的一个层次，它代表一定自然区域相互问有直接或问接联系的所有生物

  D.生物个体中由功能相关的“器官”联合组成的“系统"层次，是每种生物个体都具备的

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• 2生命活动离不开细胞，不包括下列内容中的

  A.缩手反射的完成是以细胞为结构基础

  B.生物与环境的物质和能量交换以细胞代谢为基础

  C.遗传和变异以细胞内基因的传递和变化为基础

  D.龟的单个细胞也能完成各种生命活动

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• 3“核糖”不可能是下列哪一种结构或物质的组成成分

  A.HIV

  B.T₂噬菌体

  C.核糖体

  D.ATP

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• 4下列有关生物膜的叙述中正确的是（    ）

  A.各种生物膜的化学组成和结构完全相同，在结构和功能上紧密联系

  B.变形虫对大颗粒性物质的吞食需借助于膜的选择透过性来完成

  C.所有的酶都在生物膜上，没有生物膜生物就无法进行各种代谢活动

  D.光合作用过程中，ATP、[H]和O₂都在叶绿体类囊体薄膜上产生

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• 5从组成生物体的化学元素对生物体的重要作用来看，哪项叙述和此无关？（    ）

  A.生物体的C、H、O、N、P、S是组成细胞的主要元素

  B.植物体中的N、P、K、Mg等必需矿质元素对光合作用都具有重要影响

  C.碳元素虽不一定是细胞中含量最高的，但却是组成生物体最基本的元素，地球上的生命是在碳元素的基础上建立起来的

  D.生物体中的C、H、O、N、P、S、K、Ca等属于大量元素，Fe、Mn、Cu、B等属于微量元素

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• 6某研究人员对玉米组织、小白鼠组织、T₂噬菌体、乳酸菌、酵母菌等样品进行化学成分分析。以下分析结果不正确的是

  A.含有水、DNA、RNA、糖原、蛋白质等成分的样品是小白鼠组织

  B.只含有蛋白质和DNA成分的样品是T₂噬菌体，

  C.含有水、DNA、RNA、蛋白质、纤维素等成分的样品是玉米组织

  D.既有DNA，又有RNA的是玉米组织、小白鼠组织、乳酸菌

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• 7除哪项外，其余各项对①～⑨中物质或结构在下列生物中的叙述都是正确的①核酸／②蛋白质／③液泡／④叶绿体／⑤线粒体／⑥核膜／⑦核糖体／⑧细胞膜／⑨细胞壁

  A.①、②在噬菌体、大肠杆菌、衣藻和草履虫体内都存在

  B.①～⑨在衣藻体内都存在

  C.⑦、⑧、⑨在大肠杆菌和衣藻体内都存在

  D.除⑥外，其余的在衣藻和蓝藻体内都存在

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• 8据报载，华人科学家、美国北卡罗来纳州立大学罗利分校生物学教授石家兴发现，一种可以分解鸡毛中的角蛋白酶，有可能被用来“消化”导致疯牛病和人类克雅氏症的毒蛋白。他与荷兰一家 疯牛病专业检测机构联合进行的试验表明，角蛋白酶确实能够破坏毒蛋白，使其丧失传染能力。由此可知，该毒蛋白有着与鸡毛中的角蛋白相似的

  A.元素组成

  B.基本结构单位

  C.空间结构

  D.功能

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• 9研究人员分别对光合细菌和蛔虫进行分析、观察等实验，获得的结果如下表，其中“√”表示存在，“×”表示没有，你认为下列判断正确的是<table style="MARGIN: auto auto auto 76pt; WIDTH: 524px; BORDER-COLLAPSE: collapse; HEIGHT: 123px; mso-table-layout-alt: fixed; mso-padding-alt: 0cm 0cm 0cm 0cm" border="0" cellspacing="0" cellpadding="0" _dj="MsoNormalTable"><tbody><tr style="HEIGHT: 16.65pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-height-rule: exactly"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 57.45pt; PADDING-RIGHT: 0cm; HEIGHT: 16.65pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly" valign="top" width="77"> </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 46.85pt; PADDING-RIGHT: 0cm; HEIGHT: 16.65pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="62">核仁</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 47.3pt; PADDING-RIGHT: 0cm; HEIGHT: 16.65pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="63">光合色素</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.85pt; PADDING-RIGHT: 0cm; HEIGHT: 16.65pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="50">叶绿体</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.9pt; PADDING-RIGHT: 0cm; HEIGHT: 16.65pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="51">线粒体</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.9pt; PADDING-RIGHT: 0cm; HEIGHT: 16.65pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="51">中心体</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.85pt; PADDING-RIGHT: 0cm; HEIGHT: 16.65pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="50">核糖体</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 95.1pt; PADDING-RIGHT: 0cm; HEIGHT: 16.65pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="127">纤维素酶处理的结果</td></tr><tr style="HEIGHT: 18.85pt; mso-yfti-irow: 1; mso-height-rule: exactly"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 57.45pt; PADDING-RIGHT: 0cm; HEIGHT: 18.85pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="77">蓝藻 </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 46.85pt; PADDING-RIGHT: 0cm; HEIGHT: 18.85pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="62">× </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 47.3pt; PADDING-RIGHT: 0cm; HEIGHT: 18.85pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="63">√ </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.85pt; PADDING-RIGHT: 0cm; HEIGHT: 18.85pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="50">× </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.9pt; PADDING-RIGHT: 0cm; HEIGHT: 18.85pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="51">× </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.9pt; PADDING-RIGHT: 0cm; HEIGHT: 18.85pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="51">× </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.85pt; PADDING-RIGHT: 0cm; HEIGHT: 18.85pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="50">√ </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 95.1pt; PADDING-RIGHT: 0cm; HEIGHT: 18.85pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="127">无变化 </td></tr><tr style="HEIGHT: 15.55pt; mso-yfti-irow: 2; mso-height-rule: exactly"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 57.45pt; PADDING-RIGHT: 0cm; HEIGHT: 15.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="77">蛔虫</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 46.85pt; PADDING-RIGHT: 0cm; HEIGHT: 15.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="62">√</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 47.3pt; PADDING-RIGHT: 0cm; HEIGHT: 15.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="63">×</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.85pt; PADDING-RIGHT: 0cm; HEIGHT: 15.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="50">×</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.9pt; PADDING-RIGHT: 0cm; HEIGHT: 15.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="51">×</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.9pt; PADDING-RIGHT: 0cm; HEIGHT: 15.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="51">√</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.85pt; PADDING-RIGHT: 0cm; HEIGHT: 15.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="50">√</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 95.1pt; PADDING-RIGHT: 0cm; HEIGHT: 15.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="127">无变化</td></tr><tr style="HEIGHT: 15.7pt; mso-yfti-irow: 3; mso-height-rule: exactly; mso-yfti-lastrow: yes"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 57.45pt; PADDING-RIGHT: 0cm; HEIGHT: 15.7pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="77">叶肉细胞</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 46.85pt; PADDING-RIGHT: 0cm; HEIGHT: 15.7pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="62">√</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 47.3pt; PADDING-RIGHT: 0cm; HEIGHT: 15.7pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="63">√ </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.85pt; PADDING-RIGHT: 0cm; HEIGHT: 15.7pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="50">√ </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.9pt; PADDING-RIGHT: 0cm; HEIGHT: 15.7pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="51">√ </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.9pt; PADDING-RIGHT: 0cm; HEIGHT: 15.7pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="51">× </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 37.85pt; PADDING-RIGHT: 0cm; HEIGHT: 15.7pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="50">√ </td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 95.1pt; PADDING-RIGHT: 0cm; HEIGHT: 15.7pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-height-rule: exactly; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="127">无变化 </td></tr></tbody></table>　

  A.只有一项正确

  B.只有两项正确

  C.三项均正确

  D.均不正确

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