Today is Sunday. It is a sunny day. Mike and Paul are going to have a picnic in the park. There are many green trees. Near the gate，there is a lake. Some ducks are swimming on the lake.

    Mike and Paul are going to have lunch at half past eleven. Then they are going to read some books under a big tree.

随着科学技术的发展，人们可以根据需求来改造生物的性状．如图是利用奶牛乳汁生产人类血清白蛋白的图解，据图回答问题．

（1）在此过程中涉及到某些细胞工程技术，其原理有____ ．

（2）在基因工程中，经常需要对②进行扩增，该过程需要用到的酶是____ ．基因工程的核心是____ ．检测②是否表达可以用____ 

（3）从④到⑤的过程涉及到的技术是____，把⑤送入⑥前需要对⑥进行的处理是____ ．

（4）⑦是⑥的后代，那么⑦的遗传性状和____最相似，原因是____ ．

细胞膜在生命活动中具有重要作用．下列相关叙述错误的是（　　）