1.やさしい
What is the cytoplasm?
- AThe space between two neighbouring cells
- BThe fluid found only inside the nucleus
- CThe stiff outer layer of cellulose that surrounds a plant cell
- DThe jelly-like contents between the membrane and nucleus
2.やさしい
What is the main role of the cytoskeleton?
- AIt controls which substances enter the cell
- BIt stores the genetic code of the cell
- CIt gives the cell its shape and helps it move
- DIt joins amino acids into proteins
3.やさしい
How does a vaccine protect a person?
- AIt replaces the person's white blood cells with stronger ones
- BIt blocks the pathogen from entering the nose
- CIt kills all bacteria in the body straight away
- DIt trains the immune system with a harmless form of a pathogen
4.ふつう
Red-green colour blindness is X-linked recessive. A colour-blind woman (XᵇXᵇ) has children with a man with normal colour vision (XᴮY). What fraction of their sons is expected to be colour-blind?
- AOne half
- BNone
- COne quarter
- DAll
5.ふつう
What happens during telophase of mitosis?
- AA nuclear envelope forms around each set of chromosomes
- BThe chromosomes line up across the middle of the cell
- CThe DNA is copied for the next division
- DThe sister chromatids are pulled apart
6.ふつう
Why is a buffer system important in blood?
- AIt raises the blood glucose level
- BIt carries oxygen to the tissues
- CIt resists changes in pH
- DIt makes the blood clot faster
7.むずかしい
植物細胞を純水に入れた。動物細胞のように破裂しないのはなぜか。
- A液胞がすべての水をすぐに外へ汲み出すから
- B植物細胞には細胞膜がないから
- C水は植物細胞に入れないから
- D細胞が満たされるにつれて細胞壁が押し返し、細胞が張る(膨圧がかかる)から
8.むずかしい
A scientist wants to show that a particular microbe causes a disease. According to Koch's postulates, which step is needed?
- AThe disease must be treated successfully with antibiotics
- BThe microbe must be seen in the blood under a light microscope
- CThe microbe must be found in healthy hosts just as often as in sick hosts
- DThe microbe grown from a sick host must cause the disease in a healthy host
解答
- 1. D · The jelly-like contents between the membrane and nucleus
- 2. C · It gives the cell its shape and helps it move
- 3. D · It trains the immune system with a harmless form of a pathogen
- 4. D · All
- 5. A · A nuclear envelope forms around each set of chromosomes
- 6. C · It resists changes in pH
- 7. D · 細胞が満たされるにつれて細胞壁が押し返し、細胞が張る(膨圧がかかる)から
- 8. D · The microbe grown from a sick host must cause the disease in a healthy host
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