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. BProteins
3. CCarbohydrates
4. DNucleic acids

Which molecules, made by immune cells, bind to specific antigens?

1. AEnzymes
2. BAntibodies
3. CHormones
4. DPhospholipids

Which feature helps a sperm cell carry out its job?

1. AA large vacuole for storing water
2. BChloroplasts for making food
3. CA cell wall for protection
4. DA flagellum for swimming

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

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

翻译发生在哪里？

1. A核糖体上
2. B细胞壁中
3. C细胞核内
4. D溶酶体中

Which DNA bases are purines?

1. AAdenine and guanine
2. BCytosine and guanine
3. CAdenine and thymine
4. DCytosine and thymine

In the Hershey–Chase experiment, viruses were labelled with radioactive phosphorus in their DNA or radioactive sulfur in their protein. Only the phosphorus entered the infected bacteria. What did this show?

1. ADNA, not protein, is the genetic material of the virus
2. BBacteria take up any radioactive substance
3. CViruses contain no DNA at all
4. DProtein, not DNA, is the genetic material of the virus

The wings of a bat and the wings of a butterfly are used for flying but have very different structures. What are they called, and what does this show?

1. AHomologous structures, which were inherited from a shared ancestor
2. BVestigial structures, which no longer have a function
3. CHomologous structures, which have the same bones inside
4. DAnalogous structures, which evolved separately for the same job