1.やさしい
生きているとみなされる最小の単位はどれか。
- A原子
- B分子
- C組織
- D細胞
2.やさしい
RNAにあってDNAにはない塩基はどれか。
- Aグアニン
- Bウラシル
- Cアデニン
- Dチミン
3.やさしい
What is a genetically modified organism (GMO)?
- AAn organism that has been grown in a greenhouse
- BAn organism whose DNA has been changed by genetic engineering
- CAn organism produced by normal sexual reproduction between two parents
- DAn organism that has caught a virus
4.ふつう
During which division of meiosis do homologous chromosomes separate?
- AMeiosis I
- BBoth meiosis I and meiosis II
- CMeiosis II
- DNeither, because they separate in mitosis
5.ふつう
In gel electrophoresis, why does DNA move towards the positive electrode?
- ADNA has no charge and moves at random
- BDNA has a negative charge from its phosphate groups
- CDNA has a positive charge from the nitrogen bases it contains
- DDNA is pulled by gravity through the gel
6.ふつう
相同染色体どうしの乗換えが起こるのはいつか。
- A減数分裂の第二分裂終期
- B間期のS期
- C体細胞分裂の後期
- D減数分裂の第一分裂前期
7.むずかしい
各酵素が通常 1 種類の基質にしか作用しないのはなぜか。
- A基質は酵素自身がつくるから
- B各酵素が、その基質のDNAを含んでいるから
- C酵素は核の中でしかはたらけないから
- D活性部位の形が、その基質にだけ合うから
8.むずかしい
A plant that is AaBb is crossed with an AaBB plant. A and B are dominant, and the genes assort independently. What fraction of the offspring show both dominant traits?
- A1/2
- B9/16
- C3/4
- D1/4
解答
- 1. D · 細胞
- 2. B · ウラシル
- 3. B · An organism whose DNA has been changed by genetic engineering
- 4. A · Meiosis I
- 5. B · DNA has a negative charge from its phosphate groups
- 6. D · 減数分裂の第一分裂前期
- 7. D · 活性部位の形が、その基質にだけ合うから
- 8. C · 3/4
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