1.やさしい
In an enzyme reaction, what is the substrate?
- AThe product released at the end
- BThe gene that codes for the enzyme
- CThe substance that the enzyme acts on
- DThe part of the enzyme that changes shape
2.やさしい
Which of these diseases is caused by a virus?
- AMalaria
- BAthlete's foot
- CInfluenza
- DTuberculosis
3.やさしい
真核細胞のDNAの大部分はどこにあるか。
- A細胞壁
- B細胞膜
- C核
- Dリソソーム
4.ふつう
Which element is found in all amino acids but not in carbohydrates?
- AOxygen
- BNitrogen
- CCarbon
- DHydrogen
5.ふつう
What is the role of oxygen in aerobic respiration?
- AIt is built into glucose molecules
- BIt accepts electrons at the end of the transport chain
- CIt is split to release the energy needed for glycolysis
- DIt breaks pyruvate into lactic acid
6.ふつう
Why is DNA replication called semiconservative?
- AEach new DNA molecule has one old strand and one new strand
- BEach new strand is a random mix of old and new pieces
- COnly half of the DNA is copied each time
- DThe old DNA molecule is kept whole, and a completely new one is made
7.むずかしい
A diploid cell contains 10 units of DNA in G1. How many units are in each cell at the end of meiosis II?
- A10 units
- B5 units
- C20 units
- D2.5 units
8.むずかしい
Redi placed meat in open jars and in jars covered with gauze. Maggots appeared only on meat that flies could reach. What did this show?
- AMeat turns into maggots when exposed to air
- BFlies form from rotting meat, and then they lay eggs on fresh meat
- CGauze produces chemicals that stop meat from rotting
- DMaggots come from eggs laid by flies, not from the meat itself
解答
- 1. C · The substance that the enzyme acts on
- 2. C · Influenza
- 3. C · 核
- 4. B · Nitrogen
- 5. B · It accepts electrons at the end of the transport chain
- 6. A · Each new DNA molecule has one old strand and one new strand
- 7. B · 5 units
- 8. D · Maggots come from eggs laid by flies, not from the meat itself
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