
细胞分化
Authored by Chem Bio L3
Biology
12th Grade
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13 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列关于细胞分化的描述不正确的是
细胞分化发生在生物体的整个生命进程中
细胞分化仅发生在胚胎时期
经过细胞分化会形成各种不同的细胞和组织
细胞分化是一种持久性的变化
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
细胞分化是生物界普遍存在的一种生命现象,下列不正确的是
老年动物体内也有细胞的分化
分化是基因在特定的时间和空间条件下选择性表达的结果
愈伤组织的形成是离体的植物细胞分化的结果
分化后的不同细胞中mRNA的种类和数量不相同
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
人的唾液腺细胞能大量合成唾液淀粉酶,但它却不能合成血红蛋白。人的唾液腺细胞中
有唾液淀粉酶基因和血红蛋白基因
只有唾液淀粉酶基因
有唾液淀粉酶基因和其他基因,但没有血红蛋白基因
缺少合成血红蛋白所必需的氨基酸
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列关于细胞分化的叙述,错误的是
组织器官的形成是细胞分化的结果
癌细胞是一类高度分化的细胞
高度分化的植物细胞仍具有全能性
细胞分化是基因在特定条件下选择性表达的结果
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
细胞分化过程中,不会出现的是
细胞表面结构改变
细胞器的数量发生改变
蛋白质的种类和数量改变
细胞核遗传物质的改变
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
奢侈基因是指在特别细胞类型中大量表达,并编码特殊功能产物的基因。细胞分化就是奢侈基因选择性表达的结果。下列属于奢侈基因的是
核糖体蛋白基因
ATP合成酶基因
DNA解旋酶基因
抗体蛋白基因
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
正常人体内的造血干细胞能分裂产生各种血细胞,在体外,在某些因素的诱导下,却可以分化为神经细胞和肝细胞。其根本原因是这些造血干细胞
有旺盛的分裂能力
能合成神经细胞或肝细胞需要的蛋白质
还没有分化
具有与受精卵相同的全套遗传基因
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