题干

提取鼠肝细胞的线粒体为实验材料,向盛有线粒体的试管中注入丙酮酸时,测得氧的消耗量较大;当注入葡萄糖时,测得几乎不耗氧;同时注入细胞质基质和葡萄糖时,氧消耗量又较大。下列叙述中与实验结果不符合的是

A:有氧呼吸中,线粒体内进行的是第二、三阶段

B:线粒体内能分解丙酮酸,不能分解葡萄糖

C:水是在细胞质基质中生成的

D:葡萄糖只能在细胞质基质内被分解成丙酮酸

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答案(点此获取答案解析)

C

同类题1

阅读下面材料,从A、B、C、D四个选项中选出一个最佳选项。

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    Brian was a funny student. He loved watching comedies(喜剧) best and hoped to become a comedy actor one day.

When he heard about the talent show to be held at this school, Brian decided to take part in. He had never acted on stage(舞台) before, and he was very excited. But some students laughed at him. “You are not funny but silly,” Ken, one of his classmates, said to his face. “No one will like what you do,” another boy also said to him, loudly.

Brian couldn't understand why they were so unkind to him. For a moment, he thought about giving up the show. But he remembered how much his friends liked his jokes, and also his teachers said he was very funny. So he decided to prepare for the show.

    Brian did a great job at the talent show. Everyone loved his performance, and he won the first prize! His teachers and friends were proud of him. Even so, Ken told Brian that he was not funny, and that he would never be successful. Brian didn't understand why Ken said so, but he realized that it had nothing to do with him. He confidently continued to work towards his goal.

   As the years went on, Brian met more people like Ken. “you'll do a terrible job,” they said to him. Luckily, most people encouraged him and some helped him to become even funnier. He got a lot of opportunities to perform in movies. He was even invited to appear on television. His fans thanked him because his comedies made them feel good when they were unhappy.

    Now Brian is a big comedy star! He is doing what he loves best. He never feels stressed like those unkind people, and he laughs all day long!