1.やさしい
浸透とは、半透膜を通る何の拡散か。
- Aナトリウムイオン
- B水
- Cグルコース
- Dタンパク質
2.やさしい
What does it mean that a cell membrane is selectively permeable?
- AIt lets only water molecules cross
- BIt lets every substance cross freely in both directions
- CIt lets no substance cross at all
- DIt lets some substances cross but not others
3.やさしい
表現型とは何か。
- A配偶子に含まれる染色体の数
- B生物がある遺伝子について持つ対立遺伝子の組
- C目の色のような、観察できる形質
- D遺伝子の塩基の並び順
4.ふつう
What is an inversion mutation?
- AA chromosome segment breaks off and is reattached the wrong way round
- BA whole extra chromosome is added to the cell
- CA segment of a chromosome is lost completely
- DA segment of a chromosome moves to a different, non-matching chromosome
5.ふつう
粗面小胞体が「粗く」見えるのはなぜか。
- A表面に脂肪滴が蓄えられているから
- B外側にリソソームが融合しているから
- C膜の内側に葉緑体があるから
- D表面にリボソームが付着しているから
6.ふつう
A greenhouse is warm and brightly lit, but the air has very little carbon dioxide. What is most likely limiting the rate of photosynthesis?
- AThe light intensity in the greenhouse
- BThe number of stomata
- CThe temperature
- DThe carbon dioxide concentration
7.むずかしい
A man has Klinefelter syndrome (XXY). Which error most likely produced it?
- ANondisjunction of the sex chromosomes during meiosis in a parent
- BA frameshift mutation in one of the genes on the father's Y chromosome
- CCrossing over between chromosome 21 and the X chromosome
- DExtra mitosis in the zygote after fertilisation
8.むずかしい
Ignoring crossing over, how many different combinations of chromosomes can one person's gametes have because of independent assortment?
- A2 × 23, which is 46
- B46, one for each chromosome
- C2²³, about 8 million
- D23², about 529
解答
- 1. B · 水
- 2. D · It lets some substances cross but not others
- 3. C · 目の色のような、観察できる形質
- 4. A · A chromosome segment breaks off and is reattached the wrong way round
- 5. D · 表面にリボソームが付着しているから
- 6. D · The carbon dioxide concentration
- 7. A · Nondisjunction of the sex chromosomes during meiosis in a parent
- 8. C · 2²³, about 8 million
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