题干

某种细菌会使人类患脑膜炎,原因是该菌的一种名为InIc的蛋白可通过抑制人类细胞中的Tuba蛋白的活性,使细胞膜更易变形而有利于细菌的转移。下列叙述正确的是(   )

A:该菌寄生在人体细胞中,消灭该菌主要依靠细胞免疫

B:该菌使人类细胞发生变形,说明细胞膜具有选择透过性

C:Tuba蛋白和InIc蛋白的合成均需要内质网的加工

D:该菌的遗传物质主要是DNA

上一题 下一题 0.0难度 选择题 更新时间:2019-08-31 04:43:34

答案(点此获取答案解析)

A

同类题3

    Many people who work in London prefer to live outside it, and to go in to their offices or schools every day by train, car or bus, even though this means they have to get up early in the morning and reach home late in the evening. 
    One advantage of living outside London is that houses are cheaper. Even a small flat in London without a garden costs quite a lot to rent. With the same money, one can get a little house in the country with a garden of one's own.
    Then, in the country one can really get away from the noise and hurry of busy working lives. Even though one has to get up earlier and spend more time in trains or buses, one can sleep better at night and during weekends and on summer evenings, one can enjoy the fresh, clean air of the country. If one likes gardens, one can spend one's free time digging, planting, watering and doing the hundred and one other jobs which are needed in a garden. Then, when the flowers and vegetables come up, one has got the reward together with those who have shared the secret of nature.
    Some people, however, take no interest in country things: for them, happiness lies in the town, with its cinemas and theatres, beautiful shops and busy streets, dance-halls and restaurants. Such people would feel that their life was not worth living if they had to live it outside London. An occasional (偶尔的) walk in one of the parks and a fortnight's (two weeks) visit to the sea every summer is all the country they want: the rest of the country they are quite prepared to spend with those who are glad to get away from London every night.