1.やさしい
ウイルスが単独で増殖できないのはなぜか。
- A減数分裂でしか分裂しないから
- B日光の下でしか増殖しないから
- CDNAもRNAも、いかなる遺伝物質ももたないから
- Dコピーをつくるために宿主細胞の仕組みを必要とするから
2.やさしい
What is a mutagen?
- AA protein that repairs damaged DNA
- BSomething that can cause changes in DNA
- CA cell that divides without control
- DAn enzyme that copies DNA
3.やさしい
細胞説によれば、新しい細胞はどこから生じるか。
- A体内に入ったウイルスから
- B食物中のミネラルから
- Cすでに存在する細胞から
- D体内の非生物の物質から
4.ふつう
In evolution, what does an organism's fitness mean?
- AHow many offspring it leaves that survive and reproduce
- BHow long the organism lives
- CHow strong and fast the organism is compared with others
- DHow large the organism grows
5.ふつう
After gel electrophoresis, which DNA fragments are found furthest from the wells?
- AThe fragments with the most adenine
- BThe largest fragments
- CThe smallest fragments
- DThe fragments with the most guanine
6.ふつう
What is the function of the pores in the nuclear envelope?
- AThey make ribosomal RNA for the cell
- BThey attach the nucleus to the cell membrane
- CThey let molecules such as mRNA pass in and out
- DThey let chromosomes leave the nucleus to be copied
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?
- A2 × 23, which is 46
- B23², about 529
- C2²³, about 8 million
- D46, one for each chromosome
8.むずかしい
Why do phospholipids arrange themselves into a double layer in water?
- ATheir heads are hydrophilic and their tails are hydrophobic
- BTheir heads are hydrophobic and their tails are hydrophilic
- CThey carry a strong positive charge on both ends
- DThey are fully soluble in water
解答
- 1. D · コピーをつくるために宿主細胞の仕組みを必要とするから
- 2. B · Something that can cause changes in DNA
- 3. C · すでに存在する細胞から
- 4. A · How many offspring it leaves that survive and reproduce
- 5. C · The smallest fragments
- 6. C · They let molecules such as mRNA pass in and out
- 7. C · 2²³, about 8 million
- 8. A · Their heads are hydrophilic and their tails are hydrophobic
ステップごとの詳しい解答:このトピックは examproblems.com で練習できます。