跪求历年高中生物奥赛试题以及答案，有的发我邮箱aohan0476@163.com
推荐回答（3个）
高中生物合集百度网盘下载
链接：https://pan.baidu.com/s/1znmI8mJTas01m1m03zCRfQ
?pwd=1234
提取码：1234
简介：高中生物优质资料下载，包括：试题试卷、课件、教材、视频、各大名师网校合集。
细胞生物学、生物化学、微生物学
1．关于膜蛋白，下列描述错误的是
A．膜蛋白是生物膜最为重要的组成部分
B．外在膜蛋白比内在膜蛋白更易分离
C．根据膜蛋白分离的难易及在膜中分布的位置，分为外在膜蛋白和内在膜蛋白
D．膜蛋白含量和种类与膜的功能密切相关
E．内在膜蛋白露在膜外的部分含较多的非极性氨基酸，属疏水性
2．根据信号假说，错误的是
A．胞浆中存在信号肽识别粒子， B．SRP可识别并结合信号肽
C．SRP不需与对接蛋白结合 D．信号肽带动蛋白质进入内质网膜
E．借助转运系统完成蛋白质分泌
3．关于线粒体的叙述，下列哪些是正确的
A．内膜对各种物质的通过具有严格的选择性 B．外膜通透性低
C．有内、外两层膜结构 D．线粒体大小、形状和数目因细胞而异
4．有关高尔基体是极性细胞器的描述，哪项是正确的
A．高尔基对糖蛋白的加工过程是随机不是有序地进行
B．小囊泡位于高尔基体的顺面，大囊泡位于高尔基体的反面
C．膜脂介于细胞膜和内质网膜之间，反面膜较顺膜含酶的种类不同
D．反面的膜类似于细胞膜，顺面的膜类似于内质网
E．扁平囊顺面的膜较薄，厚约6nm，随着顺面向反面过渡，膜也逐渐加厚，至反面膜厚约8nm
5．在细胞中，微管的功能之一是
A．组成肌纤维的主要成分 B．在有丝分裂中使染色体移向两级
C．参与细胞间的锚定连接而形成桥粒 D．在细胞分裂末期形成胞质分裂环而使细胞分裂
第6～7题为题组：
X是一种激素，而Y是一种细胞生长因子，当X或Y与在特定细胞细胞膜上的专一受体(receptor，R)结合后，会分别引起一连串细胞内反应如下：
X→X-R1→G蛋白质1→腺苷环化酶(aderlyl cyclase)→环化腺苷单磷酸(cAMP)→
蛋白质激酶A(protein kinase A)→整合附着蛋白→细胞附着Y→Y-R2，→G蛋白质2→磷
脂酶C(phospholipase C)→二酰甘油(diacylglycerol)→蛋白质激酶C(protein kinase C)→……→特定基因转录
6．试问环化腺苷单磷酸及二酰甘油在上述反应中的作用是
A．激素 B．细胞生长因子C．二级信号分子 D．蛋白质激酶受体
E．蛋白质激酶底物
7．下列有关细胞内信息传递的叙述，正确的是
A．G蛋白质为一种膜蛋白，无酶功能
B．蛋白质激酶A及C的底物应是蛋白质
C．蛋白质激酶A及C的底物会被硝酸化
D．腺苷环化酶及磷脂酶C会磷酸化蛋白质激酶
E．若将X或Y直接注射到细胞内，会引发快速反应
(8--10)细胞周期(cell cycle)可分为G1，S，G2，M等四期，科学家发现有一类蛋白质在细胞内的浓度，会随着每一次的细胞循环而起落，这类蛋白质称为“循环子”(cyclin)，不同的循环子调节细胞进人不同的循环期。下图为有关循环子E(cyclin E)的实验，控制组的细胞只植入载体，实验组细胞则植入含循环子E(cyclin E)基因的载体；横坐标为荧光强度(代表DNA含量)，纵坐标为细胞数目。试依据下图回答第74～76题。
8．由图中数据显示，循环子E(cyclin E)可促使细胞进入哪一期
A．G1→S B．S→G2／M C．G2／M→G1 D．S→Gl E．G2→M
9．由图中显示，在G2/M期的细胞，其DNA含量约为G1期细胞的几倍
A．0．5倍 B．1．O倍 C．1．5倍 D．2．0倍 E．2．5倍
10．由图中推断，S期的细胞正进行何种反应
A．有丝分裂 B．形成纺锤丝 C．分解细胞核膜 D．DNA复制
E．染色体浓缩
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