下列关于原核生物和真核生物的叙述，正确的是（）

题干

A：原核生物细胞不含线粒体，不能进行有氧呼吸

B：真核生物细胞只进行有丝分裂，原核生物细胞只进行无丝分裂

C：真核生物细胞具有细胞膜系统（生物膜系统），有利于细胞代谢有序进行

D：真核生物以DNA为遗传物质，部分原核生物以RNA为遗传物质

上一题下一题 0.0难度选择题更新时间:2017-06-29 12:36:41

C

(B)

Hi, friends! What do you like to do after school? In my school, we have different things (不同的事情) to do.

	Mike does his homework (家庭作业) in the classroom. He likes doing his homework at school. The classroom building is in the middle of the school.
	Lucy likes playing on the playground. Many students play there after school. The playground is behind the classroom building.
	Jack likes reading books in the library after school. There are lots of books in our library. The library is on the left of the classroom building.
	Students can play computer games in the science building. Peter likes playing computer games after school. The science building is on the right of the classroom building.