如图为高等绿色植物和高等动物(如人体)新陈代谢的部分过程示意图,请分析回答:(1)在缺氧状态下,含

2025-04-07 13:17:25
推荐回答(1个)
回答(1):

(1)缺氧气的条件下,细胞进行无氧呼吸,无氧呼吸的场所是细胞质基质,因此无氧呼吸过程中产生的二氧化碳直接进入含叶绿体结构的另一细胞中被利用至少穿过细胞膜、另一细胞的细胞膜、叶绿体外膜、叶绿体内膜共4层膜,8层磷脂分子.
(2)人体糖类代谢过程中肌糖原不能水解形成葡萄糖,人体细胞不能进行产生酒精和二氧化碳的无氧呼吸,因此不会出现③⑤过程.
(3)促进血糖合成糖原的激素是胰岛素.
(4)⑨是氨基酸形成蛋白质的过程,蛋白质合成的场所是核糖体,在核糖体上进行氨基酸脱水缩合反应即翻译过程,翻译过程需要酶的催化.mRNA为模板,tRNA为运载工具,同时需要ATP水解产生的能量.
(5)由题意可知,5-氟嘧啶的结构与尿嘧啶非常相似,因此5-氟嘧啶可以影响转录过程,从而干扰癌基因的表达,达到治疗癌症的功效;由题意知,该实验的目的是验证某药物对肿瘤有较好的疗效,实验自变量是否加入某种药物,因变量是癌细胞增殖数量,可以用放射性进行检测,因此如果验证某药物对肿瘤有较好的疗效,将种瘤细胞悬浮液分成等细胞数的A、B两组.A组加入3H标记的胸腺嘧啶脱氧核苷酸,B组加入3H标记的胸腺嘧啶脱氧核苷酸和药物X,相同条件下培养一段时间后,洗去培养液,把两组细胞做相应的处理,分别检测两组细胞的放射性强度.
故答案为:
(1)8  
(2)③和⑤
(3)胰岛素
(4)核糖体    酶、ATP和RNA
(5)转录(或翻译)       3H标记的胸腺嘧啶脱氧核苷酸     3H标记的胸腺嘧啶脱氧核苷酸和药物X

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