1.やさしい
What is apoptosis?
- AUncontrolled cell division
- BProgrammed cell death
- CFusion of two gametes
- DDivision of the cytoplasm
2.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
- BDNAもRNAも、いかなる遺伝物質ももたないから
- C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
- D日光の下でしか増殖しないから
3.やさしい
グルコースはどの種類の分子の例か。
- A脂質
- B多糖
- Cタンパク質
- D単糖
4.ふつう
In disease spread, what is a vector?
- AAn organism that carries a pathogen between hosts
- BA medicine that destroys a pathogen in the body
- CA blood test used to detect antibodies
- DThe first person to catch a disease
5.ふつう
A person catches chickenpox once and does not usually become ill with it again. Why?
- AThe virus stays in the blood and kills new viruses
- BThe skin becomes thicker after the first infection
- CMemory cells give a faster, stronger response the next time
- DAntibodies from the first infection turn into new viruses
6.ふつう
When plotting the results of an experiment, which variable usually goes on the y-axis?
- AThe time the experiment started
- BThe independent variable
- CThe controlled variable
- DThe dependent variable
7.むずかしい
Why is one new DNA strand made in short pieces (Okazaki fragments) during replication?
- AHelicase cuts that strand into pieces before copying
- BOnly half of the DNA needs to be copied
- CThe lagging strand is made of RNA instead of DNA, so it must be built in pieces
- DDNA polymerase works only 5' to 3', and the strands are antiparallel
8.むずかしい
Bacteria in a closed flask grow quickly at first, but the population then stops increasing. What is the main reason?
- AThe bacteria change into viruses after many divisions
- BThe flask becomes too cold for growth
- CThe bacteria stop dividing once they reach adult size
- DNutrients run out and waste products build up
解答
- 1. B · Programmed cell death
- 2. C · 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
- 3. D · 単糖
- 4. A · An organism that carries a pathogen between hosts
- 5. C · Memory cells give a faster, stronger response the next time
- 6. D · The dependent variable
- 7. D · DNA polymerase works only 5' to 3', and the strands are antiparallel
- 8. D · Nutrients run out and waste products build up
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