1.쉬움
How does a vaccine protect a person?
- AIt trains the immune system with a harmless form of a pathogen
- BIt kills all bacteria in the body straight away
- CIt blocks the pathogen from entering the nose
- DIt replaces the person's white blood cells with stronger ones
2.쉬움
진핵세포의 DNA는 대부분 어디에 있나요?
- A세포막
- B리소좀
- C세포벽
- D핵
3.쉬움
What is a monosaccharide?
- ATwo sugars joined together, such as sucrose
- BA single sugar unit, such as glucose
- CA fat made of glycerol and fatty acids
- DA chain of many amino acids
4.보통
What happens during telophase of mitosis?
- AThe DNA is copied for the next division
- BA nuclear envelope forms around each set of chromosomes
- CThe sister chromatids are pulled apart
- DThe chromosomes line up across the middle of the cell
5.보통
A tablet contains 2.5 g of a substance. How many milligrams is this?
- A2500 mg
- B25 mg
- C0.0025 mg
- D250 mg
6.보통
세균은 보통 어떻게 번식하나요?
- A이분법으로
- B바이러스를 출아시켜서
- C씨앗을 만들어서
- D감수 분열로
7.어려움
People who carry one sickle cell allele are more resistant to malaria. Why is the allele common in regions where malaria is widespread?
- APeople with two sickle alleles are fully healthy there
- BNatural selection favours the heterozygotes there
- CMalaria causes the sickle cell mutation directly
- DThe allele is dominant, so it spreads by itself
8.어려움
Cystic fibrosis is caused by a faulty CFTR protein, which forms a chloride channel in the cell membrane. Which process is directly affected?
- ADiffusion of oxygen molecules through the lipid bilayer
- BProduction of ATP in the mitochondria
- CCopying of DNA in the nucleus
- DMovement of chloride ions through a membrane protein
정답표
- 1. A · It trains the immune system with a harmless form of a pathogen
- 2. D · 핵
- 3. B · A single sugar unit, such as glucose
- 4. B · A nuclear envelope forms around each set of chromosomes
- 5. A · 2500 mg
- 6. A · 이분법으로
- 7. B · Natural selection favours the heterozygotes there
- 8. D · Movement of chloride ions through a membrane protein
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