题干

下列有关细胞结构、功能和细胞生命历程的叙述的说法,不正确的是(  )

A:线粒体膜上没有运载葡萄糖的载体蛋白,但可以产生ATP并附着有酶

B:膜蛋白有多种重要功能,如细胞标志物、生物催化等作用

C:细胞衰老时酶活性降低,细胞核体积减小,胚胎发育过程中不存在细胞凋亡现象

D:细胞全能性的表现必须要通过细胞分化才能实现

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答案(点此获取答案解析)

C

同类题1

阅读议论文《人不炼,不成器》,然后答题

    ①人有优良的品质,又有许多劣根性杂糅在一起,好比一块顽铁得在火里烧,水里淬,一而再,再而三,又烧又淬,再加千锤百炼,才能把顽铁炼成可铸宝剑的钢材。黄金也须经过烧炼,去掉杂质,才成纯金。人也一样,我们从忧患中学得智慧,从苦痛中炼出美德来。

    ②孟子说:“故天将降大任于是人也,必先苦其心志,劳其筋骨,饿其体肤,空乏其身,行拂乱其所为,所以动心忍性,曾益其所不能。”就是说,如要锻炼一个做大事的人,必定要叫他吃苦受累,百不称心,才能养成坚忍的性格。一个人经过不同程度的锻炼,就获得不同程度的修养,不同程度的效益。好比香料,捣得愈碎,磨得愈细,香得愈浓烈。这是我们从人生经验中得到的知识。谚语:“十磨九难出好人”;人在世上炼,刀在石上磨,千锤成利器,百炼变成钢;“不受苦中苦,难为人上人”都说明了以上道理。资*源%库资*源%库 ziyuanku.com

    ③我们最循循善诱的老师是孔子。《论语》里孔子的话,都因人而发,他从来不用教条。但是他有一条很重要的教训。最理解他的弟子曾参,怕老师的教训久而失传,在《大学》里记下老师二百零五字的教训。其中最根本的一句是“自天子以至于庶人,壹是皆以修身为本”。修身,不就是锻炼自身吗?

    ④修身不是为了自己一身,是为了齐家、治国、平天下。平天下不是称王称霸,而是求全世界的和谐和平,有的国家崇尚勇敢,有的国家高唱自由、平等、博爱。中华古国向来崇尚和气,“致中和”,从和谐中求“止于至善”。

    ⑤要了解自己,就得对自己有客观的认识,所谓格物致知。

    ⑥了解自己,不是容易的事。人的头脑是很狡猾的,会找出种种歪理来支持自身的私欲。得对自己毫无偏爱,像侦探调查嫌疑犯那样窥视自己,在自己毫无防备毫无遮掩的时候——例如在梦中、在醉中、在将睡未睡的胡思乱想中,或心满意足、得意忘形时,捉住自己平时不愿或不敢承认的私心杂念。

    ⑦修身——锻炼自身,是做人最根本的要求。天生万物的目的,该是为了堪称万物之灵的人。但是天生的人,善恶杂糅,需锻炼出纯正品色来,才有价值。这个苦恼的人世,恰好是锻炼人的处所,好比炼钢的工厂,或教练运动员的操场,或教育学生的教室。这也说明,说“人生实苦”确是有理由的。

同类题2

阅读理解

    Average humans can consume 15 or more drinks in plastic bottles a month. If you were born after 1978, and live until 80 years old, you will leave behind a minimum of 14,400 plastic bottles on this planet. These bottles take hundreds of years to break down into tiny pieces of plastic, never to completely disappear. Most of the waste is consumed by fish and birds, which has shortened their lifetime greatly.

    The Plastic Bottle Village is just a great idea that might finally save us from being buried in plastic. It's a community in Panama that is going to be made of used bottles. The design process begins with building steel frames, which are then filled with these bottles. Once this step is complete, and electrical and plumbing (管道装置) lines are put inside, the plastic walls are covered by concrete—both inside and outside. So no one will actually be able to tell that the walls are made of plastic. Besides, the material will keep the house 17°C cooler than the outside, which is the biggest benefit to people living inside.

    The village is the brainchild (主意) of Robert Bezeau with the intention of setting up several environmental projects. Having started a recycling program four years ago, during which a number of plastic bottles were collected, he started to think of how they could be put to use. Soon enough, he decided to use them to build houses, and came up with a basic idea for the construction process.

    The project hopes to make people conscious of the waste that these bottles create so that they can do more to protect the environment. The village will also create an education center that will teach individuals from the world how to reuse plastic bottles as construction materials for shelter. Recycled bottles could neutralize the negative effect of your passage on this planet, and move closer to leaving only your “footprints”.