ideological and theoretical qualities and practical working ability, and strive to build a contingent of league cadres with positive work style and high quality. Hold a regular meting of the party secretary every fortnightly, arrange the work of the regiment, fedback the student information. Focus on training junior high school, junior high school secretary of the regiment branch to enable them to raise A firm political conviction, diligent and diligent learning spirit and practical and innovative work style.广西桂林市 2024-2024 学年高二生物下学期期中试题总分 90 分 考试时间 90 分钟温馨提示:请将答案填涂至答题卡上!一、选择题(1-36 题每题 1 分,共 36 分)1.下列化合物中组成元素种类最多的是( )A.葡萄糖 B.丙酮酸 C.脂肪 D.核苷酸2.下列哪一实例能证明微量元素是生命活动所必需的( )A.Mg 是叶绿素的组成成分B.油菜缺少 B 时只开花不结果C.哺乳动物血液中 Ca2+含量太低会抽搐D.缺 P 会影响 ATP 的合成3.下列哪一种结构或物质的组成成分中不含核糖 ( )A.叶绿体 B.核糖体 C.质粒 D.tRNA4.人体内含有多种多样的蛋白质,每种蛋白质( )A.都是由 20 种氨基酸组成的B.都含有结构式为(﹣NH﹣CO﹣)的肽键C.都要由细胞核内的 DNA 控制合成D.都能调节细胞和生物体的生命活动5.不发生在人体细胞器中的生理活动是( )A.抗体的加工 B.CO2的生成C.唾液淀粉酶的合成 D.丙酮酸的生成6.下列生理活动不依赖生物膜完成的是( )A.光合作用合成的葡萄糖运出叶绿体B.合成有一定氨基酸顺序的多肽链C.胰岛素合成后分泌到胰岛 B 细胞外D.突触小泡中神经递质释放到突触间隙7.下列哪项不是蓝藻和黑藻细胞都有的结构或功能( )A.都含有叶绿体 B.能够进行光合作用 C.含有 DNA 和 RNA D. 含有细胞壁和核糖体Strengthen the team connection, strengthen the knowledge education among the students (especially the first grade students), and promote the formation of good school spirit with the influence of the league members. All League branches should start with recommending outsta...