护理入学考试生物练习卷（附答案）

Which group of biomolecules forms the basic bilayer of the cell membrane and also stores long-term energy?

1. ALipids
2. BCarbohydrates
3. CNucleic acids
4. DProteins

What is a zygote?

1. AThe diploid cell formed when a sperm fertilises an egg
2. BA haploid cell made by meiosis
3. CA body cell that has just completed its first round of mitosis
4. DAn unfertilised egg cell

What is the correct order of the phases of mitosis?

1. AProphase, anaphase, metaphase, telophase
2. BMetaphase, prophase, anaphase, telophase
3. CTelophase, anaphase, metaphase, prophase
4. DProphase, metaphase, anaphase, telophase

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它不消耗任何能量，使物质顺浓度梯度移动
4. D它只使水穿过膜

What is the function of the pores in the nuclear envelope?

1. AThey let molecules such as mRNA pass in and out
2. BThey make ribosomal RNA for the cell
3. CThey let chromosomes leave the nucleus to be copied
4. DThey attach the nucleus to the cell membrane

Why is DNA replication called semiconservative?

1. AEach new DNA molecule has one old strand and one new strand
2. BEach new strand is a random mix of old and new pieces
3. COnly half of the DNA is copied each time
4. DThe old DNA molecule is kept whole, and a completely new one is made

Fresh liver is dropped into hydrogen peroxide and bubbles form quickly. Boiled liver gives no bubbles. What is the best conclusion?

1. AHydrogen peroxide is broken down only by heat
2. BThe bubbles are carbon dioxide from respiration
3. CLiver contains an enzyme that is destroyed by boiling
4. DBoiled liver contains more hydrogen peroxide than fresh liver

A cube-shaped cell has sides of 2 µm. What is its surface area-to-volume ratio?

1. A6 : 1
2. B3 : 1
3. C2 : 1
4. D1 : 3