1.쉬움
Which bonds hold the two strands of a DNA double helix together?
- AHydrogen bonds between the bases
- BPeptide bonds between the sugars
- CDisulfide bonds between the bases
- DIonic bonds between the phosphates
2.쉬움
In biology, what is a clone?
- AA genetically identical copy of an organism, cell or gene
- BAn offspring of two different parents
- CA cell with an extra chromosome
- DAn organism that carries genes from two different species
3.쉬움
개별 세포를 관찰할 때 사용하는 기구는 무엇인가요?
- A망원경
- B현미경
- C온도계
- D소리를 재는 분광계
4.보통
A cut in the skin heals as new skin cells fill the wound. Which process produces these cells?
- AMeiosis
- BMitosis
- CFertilisation
- DBinary fission
5.보통
When most people in a community are vaccinated, people who cannot be vaccinated are also protected. Why?
- AThe pathogen mutates into a harmless form
- BVaccinated people make antibodies for others
- CThe vaccine spreads from person to person
- DThe pathogen has too few hosts to spread easily
6.보통
Which DNA bases are purines?
- AAdenine and guanine
- BCytosine and thymine
- CAdenine and thymine
- DCytosine and guanine
7.어려움
A diploid cell contains 10 units of DNA in G1. How many units are in each cell at the end of meiosis II?
- A10 units
- B20 units
- C2.5 units
- D5 units
8.어려움
Liver cells take in cholesterol-carrying LDL particles only after the particles bind to specific proteins on the cell surface. Which process is this?
- AReceptor-mediated endocytosis
- BExocytosis
- CSimple diffusion
- DPinocytosis of extracellular fluid
정답표
- 1. A · Hydrogen bonds between the bases
- 2. A · A genetically identical copy of an organism, cell or gene
- 3. B · 현미경
- 4. B · Mitosis
- 5. D · The pathogen has too few hosts to spread easily
- 6. A · Adenine and guanine
- 7. D · 5 units
- 8. A · Receptor-mediated endocytosis
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