1.やさしい
What is the pH of pure water at 25 °C?
- A0
- B7
- C14
- D1
2.やさしい
Which element is found in all organic molecules?
- ASulfur
- BPhosphorus
- CCarbon
- DNitrogen
3.やさしい
What is a karyotype?
- AA diagram of a family's inheritance pattern
- BA picture of a cell's chromosomes arranged in pairs by size
- CA list of all the proteins that a cell makes during its life
- DA map of the organelles inside a cell
4.ふつう
「2倍体」とはどういう意味か。
- A細胞が 1 組の染色体をもつ
- B細胞が 2 組の染色体をもつ
- C細胞が 1 回しか分裂できない
- D細胞に核がない
5.ふつう
酵素はどのようにして化学反応を速めるか。
- A細胞の温度を上げる
- B活性化エネルギーを下げる
- C生成物にエネルギーを加える
- D反応物として消費される
6.ふつう
A tall pea plant could be TT or Tt. Which cross will best reveal its genotype?
- ACross it with another tall plant
- BCross it with a TT plant
- CCross it with a short (tt) plant
- DLet it grow for a longer time
7.むずかしい
Ignoring crossing over, how many different combinations of chromosomes can one person's gametes have because of independent assortment?
- A2²³, about 8 million
- B23², about 529
- C2 × 23, which is 46
- D46, one for each chromosome
8.むずかしい
Which parent's gamete decides the biological sex of a human baby, and why?
- AThe father's, because a sperm carries either an X or a Y
- BThe mother's, because she gives two X chromosomes
- CBoth equally, because each gives one Y chromosome
- DThe mother's, because an egg carries either an X or a Y
解答
- 1. B · 7
- 2. C · Carbon
- 3. B · A picture of a cell's chromosomes arranged in pairs by size
- 4. B · 細胞が 2 組の染色体をもつ
- 5. B · 活性化エネルギーを下げる
- 6. C · Cross it with a short (tt) plant
- 7. A · 2²³, about 8 million
- 8. A · The father's, because a sperm carries either an X or a Y
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