问题 名词解释

抗代谢作用(代谢拮抗)

答案

参考答案:

所谓代谢拮抗(MetabolicAntagonism)就是设计与生物体内基本代谢物的结构有某种程度相似的化合物,使之竞争性地与特定的酶相作用,干扰基本代谢物的被利用,从而干扰生物大分子的合成;或以伪代谢物的身份掺入生物大分子的合成中,形成伪生物大分子,导致致死合成(LethalSynthesis),从而影响细胞的生长。

填空题
阅读理解

阅读理解。

     Drinking water is good for your health. There are some scientific ways of drinking water.

     1. It is the best medicine to drink two glasses of water in the morning.

     2. Drink clean water.

     3. Drink the water that has not been boiled.

     Many people think boiled water is safe and good to people's health. In fact, it is not true. The boiling point

of water is 100℃. By boiling it, most bacteria in water can be killed. In the past, the water was less polluted,

so boiling was a good way to make clean water. But heavy metals and other dangerous things in today's water

are much more terrible than bacteria. Boiling doesn't fix that problem. And boiling water may give us more of

die dangerous things in our glass.

     4. Never use soft drinks to take the place of water.

     5. Water is also needed in winter.

     6. Drink water in the right time.

     1) After getting up in the morning, you have less water in your body, because you weren't drinking for the

whole night. So you should drink some water to keep your health after getting up in the morning. That can

prevent high blood pressure, cerebral hemorrhages (脑湓血), and so on.

     2) Drinking water at about 10 am helps your body keep enough water.

     3) Drinking water at about 3 pm can clean out the wastes in your body.

     4) About eight o'clock in die evening is the best time to drink water. Your blood gets thicker when you sleep.

Water will make your blood less thick.

     Besides, we should drink 2L of water every day. Water is so important for our life. We should drink water

often.

1. According to the passage. in the meaning is die best _____.

A. drinking some hot soup, medicine

B. drinking some porridge, breakfast

C. drinking dome water, medicine

2. _____ can prevent high blood pressure, cerebral hemorrhages and so on.

A. Drinking some water after getting up in the morning

B. Drinking some water before going to bed

C. Drinking some milk before going to bed

3. At about 3 pm, drinking water can clean the _____ in your body.

A. oil

B. food

C. wastes

4. From the passage, we can see the best time to drink water is _____.

A. about eight o'clock in the morning

B. about eight o'clock in the evening

C. before supper

5. The best title (标题) to this passage is _____.

A. Drink clean water

B. Don't drink the boiled water

C. Scientific water drinking