1.やさしい
What does the enzyme DNA ligase do?
- AIt unwinds the DNA double helix
- BIt makes RNA from a DNA template
- CIt joins pieces of DNA together
- DIt cuts DNA at specific sites
2.やさしい
真核細胞でATPの大部分をつくる細胞小器官はどれか。
- Aリソソーム
- Bリボソーム
- Cゴルジ体
- Dミトコンドリア
3.やさしい
Which enzyme adds new nucleotides to build a new DNA strand?
- ADNA polymerase
- BHelicase
- CRNA polymerase
- DPepsin
4.ふつう
What happens when a ribosome reaches a stop codon on the mRNA?
- AThe ribosome goes back to the start codon
- BA special amino acid is added to end the chain
- CThe mRNA is copied back into DNA
- DTranslation ends and the protein is released
5.ふつう
A solution of pH 4 is compared with a solution of pH 6. How many times more hydrogen ions does the pH 4 solution have?
- A10 times
- B100 times
- C20 times
- D2 times
6.ふつう
Why is the ABO blood group system an example of multiple alleles?
- AThere are three alleles of the gene in the population
- BThe gene is found on several chromosomes
- CEach person carries three different alleles of the ABO gene
- DBlood type is controlled by many separate genes
7.むずかしい
細菌の集団は、どのようにして抗菌薬に対する耐性を獲得するか。
- A各細菌が、薬にさらされたあとに耐性を学習する
- B一部の細菌がすでに耐性遺伝子をもち、薬を生き延びて増殖する
- C抗菌薬が、細菌に必要な突然変異をわざと起こす
- D患者の免疫系が細菌を耐性にする
8.むずかしい
Cyanide stops mitochondria from making ATP. Which process in the affected cells would stop first?
- ASimple diffusion of oxygen into the cell
- BFacilitated diffusion of glucose down its gradient
- COsmosis of water across the membrane
- DPumping of Na⁺ and K⁺ by the sodium-potassium pump
解答
- 1. C · It joins pieces of DNA together
- 2. D · ミトコンドリア
- 3. A · DNA polymerase
- 4. D · Translation ends and the protein is released
- 5. B · 100 times
- 6. A · There are three alleles of the gene in the population
- 7. B · 一部の細菌がすでに耐性遺伝子をもち、薬を生き延びて増殖する
- 8. D · Pumping of Na⁺ and K⁺ by the sodium-potassium pump
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