问题 读图填空题

下图表示高等动、植物细胞融合的部分过程,请据图回答:

(1)若上图表示植物细胞融合的过程,欲将丁细胞培育成植株,可选用____________技术,这一培养过程主要经过___________和___________两个阶段。

(2)若上图表示动物细胞融合的过程,过程①区别于植物细胞常用的诱导剂是________________,丁细胞称为_________。此过程中对动物细胞进行培养时,培养基中除必要的营养外通常需要加入________等一些天然成分。

(3)若上图表示制备单克隆抗体的部分过程,甲细胞为小鼠的骨髓瘤细胞,则乙细胞为____________。在分离乙细胞之前,应对小鼠进行的处理是__________。只考虑两个细胞融合,获得的丙细胞有_____种,过程②可利用________________培养基进行筛选,筛选得到的丁细胞的特点是________________。上述制备过程涉及到的生物技术有______________。

答案

(1)植物组织培养   脱分化   再分化

(2)灭活的病毒   杂交细胞    血清和血浆

(3)B淋巴细胞    将抗原注射入小鼠体内     3    特定的选择性     既能产生特异性抗体,又能大量繁殖   动物细胞融合技术、动物细胞培养技术

完形填空

根据材料内容,将A-E五个句子填入文中空缺处,使短文内容完整、正确。

Do you often travel? Do you often stay in a hotel? Most Chinese hotels often provide guests with disposable (一次性的)things, like toothbrushes, toothpaste, shampoo and slippers._____ 小题1:_____. But, if you travel to Beijing, remember to bring your own things. Starting from June, some hotels in Beijing will no longer provide guests with these disposables. ___小题2:___.

Many disposable things are made of plastic.____ 小题3:___.It is a waste of natural resources(资源) and is very bad for the environment. Do you know, one Chinese person makes as much as 400 kg of waste a year! Most of that waste comes from disposable things. In Beijing, people throw away about 19,000 tons of plastic bags and 2,320 tons of plastic lunch bowls every year!   ______小题4:_____. So the less plastic we throw out, the better. So, wherever you travel, bring your own things and use them again and again.

Back at home and school, you can also do something to make our world a better place.____ 小题5:_____: Use cloth shopping bags, not plastic ones. After using a plastic bag, wash it out and let it dry. Then you can use it over and over again. Do not use paper cups. At your school dining-room, use your own bowl and chopsticks instead of disposable ones.

To protect our environment and our home, it is very necessary and important for us to save natural resources.

A.Try to do these things in your daily life

B.People throw them away after only using them once.

C.They want to ask people to use less disposable things.

D.Plastic can take between 100 and 400 years to break down.E. Many guests like the idea because they don’t have to bring their own.

名词解释