护理入学考试生物练习卷（附答案）

What does the polymerase chain reaction (PCR) do?

1. AIt makes many copies of a piece of DNA
2. BIt cuts DNA at specific sequences
3. CIt turns RNA into protein
4. DIt separates proteins by their charge

In an enzyme reaction, what is the substrate?

1. AThe substance that the enzyme acts on
2. BThe gene that codes for the enzyme
3. CThe part of the enzyme that changes shape
4. DThe product released at the end

在科学方法中，什么是假设？

1. A可检验的解释或预测
2. B所测得的测量值清单
3. C得到许多实验支持的广泛解释
4. D已被证明为真的结论

同源染色体之间的交换（交叉互换）发生在什么时候？

1. A间期的 S 期
2. B有丝分裂的后期
3. C减数分裂的末期 II
4. D减数分裂的前期 I

哪条序列与 DNA 链 A-T-G-C-C-A 互补？

1. AU-A-C-G-G-U
2. BT-A-C-G-G-T
3. CG-C-A-T-T-G
4. DA-T-G-C-C-A

Which is the correct way to write the scientific name of the gut bacterium?

1. AEscherichia Coli
2. BEscherichia Coli
3. CEscherichia coli
4. Dcoli Escherichia

细菌的主要染色体位于哪里？它还可能携带什么额外的 DNA？

1. A位于拟核中，还有小的质粒
2. B位于细胞壁中，还有 RNA 基因
3. C位于细胞核中，还有线粒体 DNA
4. D位于核糖体中，还有额外的染色体

A pondweed plant is placed in water, and a lamp is moved closer to it. The plant gives off more bubbles per minute. What is the best conclusion?

1. AThe bubbles are carbon dioxide, and respiration speeds up with more light
2. BThe bubbles are nitrogen, and light breaks down the plant cells
3. CThe bubbles are oxygen, and photosynthesis speeds up with more light
4. DThe bubbles are oxygen, and the lamp heats the water until it boils