护理入学考试生物练习卷(附答案)

免费可打印的护理入学考试生物练习卷:8 道题,从简单到考试水平,附答案。可打印或另存为 PDF。

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姓名: ____________________   日期: ____________

1.简单

What does homozygous mean?

  1. AHaving two identical alleles for a gene
  2. BHaving only one copy of a gene
  3. CHaving two different alleles for a gene
  4. DHaving an extra chromosome
2.简单

DNA 分子是什么形状?

  1. A三螺旋
  2. B单条直链
  3. C双螺旋
  4. D平面环
3.简单

被认为有生命的最小单位是什么?

  1. A分子
  2. B细胞
  3. C组织
  4. D原子
4.中等

What happens during telophase of mitosis?

  1. AThe chromosomes line up across the middle of the cell
  2. BA nuclear envelope forms around each set of chromosomes
  3. CThe sister chromatids are pulled apart
  4. DThe DNA is copied for the next division
5.中等

下列哪项描述的是主动运输?

  1. A它消耗能量,使物质逆浓度梯度移动
  2. B它只发生在死细胞中
  3. C它只使水穿过膜
  4. D它不消耗任何能量,使物质顺浓度梯度移动
6.中等

Why do many plants close their stomata on hot, dry days?

  1. ATo speed up photosynthesis
  2. BTo release more oxygen
  3. CTo take in more carbon dioxide
  4. DTo reduce water loss
7.困难

在基因起始部位附近插入了一个多余的碱基。为什么这通常会对蛋白质产生很大的影响?

  1. A它使该基因变成另一条染色体
  2. B它没有影响,因为密码子具有简并性
  3. C它只改变蛋白质中的一个氨基酸
  4. D它使其后所有密码子的阅读框发生移位
8.困难

Why are mutations in mitochondrial DNA passed on only from mothers to their children?

  1. AMitochondrial DNA is on the X chromosome
  2. BThe zygote's mitochondria come from the egg
  3. CSperm cells contain no DNA at all
  4. DOnly women have mitochondria in their cells

答案

  1. 1. A · Having two identical alleles for a gene
  2. 2. C · 双螺旋
  3. 3. B · 细胞
  4. 4. B · A nuclear envelope forms around each set of chromosomes
  5. 5. A · 它消耗能量,使物质逆浓度梯度移动
  6. 6. D · To reduce water loss
  7. 7. D · 它使其后所有密码子的阅读框发生移位
  8. 8. B · The zygote's mitochondria come from the egg

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