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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1.简单

A solution has a pH of 3. How is it described?

  1. ANeutral
  2. BBasic
  3. CAcidic
  4. DIsotonic
2.简单

What is the main job of the cell wall in a plant cell?

  1. ATo make proteins for the cell
  2. BTo control which genes are switched on in the nucleus
  3. CTo release energy from glucose
  4. DTo support the cell and stop it from bursting
3.简单

Which enzyme adds new nucleotides to build a new DNA strand?

  1. APepsin
  2. BHelicase
  3. CDNA polymerase
  4. DRNA polymerase
4.中等

In a eukaryotic cell, where does transcription take place?

  1. AOn ribosomes in the cytoplasm
  2. BIn the Golgi apparatus
  3. CIn the nucleus
  4. DIn the lysosomes
5.中等

What does RNA polymerase do?

  1. AIt removes introns from pre-mRNA
  2. BIt builds an RNA strand from a DNA template
  3. CIt builds a protein from an mRNA template
  4. DIt copies the whole genome before cell division
6.中等

DNA 模板链的序列是 T-A-C。与之匹配的 mRNA 密码子是什么?

  1. AA-U-G
  2. BA-T-G
  3. CU-T-G
  4. DT-A-C
7.困难

一种形状与底物相似的分子结合到酶的活性位点上,使反应变慢。如何减弱它的影响?

  1. A把反应中的水全部去除
  2. B加入多得多的底物
  3. C降低底物的量
  4. D加入更多的抑制剂
8.困难

为什么每种酶通常只作用于一种底物?

  1. A底物是由酶自己制造的
  2. B酶只能在细胞核内起作用
  3. C其活性位点的形状只与该底物契合
  4. D每种酶都含有其底物的 DNA

答案

  1. 1. C · Acidic
  2. 2. D · To support the cell and stop it from bursting
  3. 3. C · DNA polymerase
  4. 4. C · In the nucleus
  5. 5. B · It builds an RNA strand from a DNA template
  6. 6. A · A-U-G
  7. 7. B · 加入多得多的底物
  8. 8. C · 其活性位点的形状只与该底物契合

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