简述细胞株（cell strain）与细胞系（cell line）的区别.

简述细胞株（cell strain）与细胞系（cell line）的区别.

细胞株(cell strain)

lants, where exists a great reluctance 【M1】______ to accept viruses as been of importance in human cancer. Basic 【M2】______ biological phenomena generally does not differ strikingly as 【M3】______ one goes from one species to other. It should be recognized that 【M4】______ cancer is a biological problem and not a problem that is unique for man. Cancer originates when a normal cell suddenly becomes a cancer cell which multiplies widely and with apparent restraint. 【M5】______ Cancer cells originate in many different kinds of cell, but the cancer cell usually continues to carry certain traits of the cell of origin. The transformation of a normal cell to a cancer cell may 【M6】______ have more than one kind of cause, but theres good reason to consider the relationships exist between viruses and cancer. Since theres no evidence which human cancer, as generally 【M7】______ experienced, is infectious, many person believe that because 【M8】______ viruses are infectious agents, they can possibly be of important in 【M9】______ human cancer. Furthermore, viruses and examples are known in which a virus never kills its host can mutate to form. a new strain 【M10】______ of virus that always kills its host. It does not seem unreasonable to assume that an innocuous latent virus might mutate to form. a strain that causes cancer.

【M1】

用于融合的理想骨髓瘤细胞不符合下列哪项

A、融合率高

B、胸腺嘧啶激酶缺陷株

C、与B细胞融合稳定

D、细胞株本身能产生免疫球蛋白

E、最常用的为NS-1细胞株

Although the fact that today viruses are known to 【S1】______

cause cancer in animals and in certain plants, that exists 【S2】______

a great reluctance to accept viruses as being of importance

in human cancer.

Basic biological phenomena generally do not

differ strikingly as one goes from one species through 【S3】______

another. It should be recognize that caner is a biological 【S4】______

problem and not a problem that is unique for man.

Cancer originates when a normal cell suddenly becomes

a cancer cell which multiplys widely and without 【S5】______

apparent restraint. Cancer may originate in many different

kind of cell, but the cancer cell usually continues 【S6】______

to carry certain traits of the cell of origin. The

transformation of a normal cell into a cancer cell may have

less than one kind of cause, but there is good reason to 【S7】______

consider the relationships that exist between viruses

and cancer.

Since there is no evidence which human cancer, as 【S8】______

generally experience, is infectious, many persons

believe that because viruses are infectious agents they

cannot possibly be of importance in human cancer.

However, viruses can mutate and examples are known

in which a virus that never kills its host can mutate to

form. a new strain of virus that always kills its host. It

does not seem unreasonable assume that an innocuous 【S9】______

latent virus might mutate to form. a strain that causes

cancer. Certainly the experiment evidence now available 【S10】______

is consistent with the idea that viruses as we know

them today, could be the causative agents of most, if not

all cancer, including cancer in man.

【S1】

根据下列短文，回答下列各题。 Despite the fact that today viruses(病毒)are known to cause cancer in animals and incertain plants，there exists a great reluctance to accept viruses as being of importance in humancancer．Basic biological phenomena generally do not differ strikingly as one goes from one spe—cies to another．It should be recognized that cancer is a biological problem and not a problemthat is unique for man．Cancer originates when a normal cell suddenly becomes a cancer cellwhich multiplies widely and without apparent restraint．Cancer may originate in many differentkinds of cell，but the cancer cell usually continues to carry certain traits(特性)of the cell of origin．The transformation of a normal cell into a cancer cell may have more than one kind of cause．but there is good reason to consider the relationships that exist between viruses and cancer． Since there is no evidence that human cancer，as generally experienced，is infections，manypersons believe that because viruses are infections agents they cannot possibly be of importancein human cancer．However，viruses can mutate(突变)and examples are known in which a vi．rus that never kills its host can mutate to form. a new strain of virus that always kills its host．Itdoes not seem unreasonable to assume that an innocuous(无害的)latent(潜伏的)virus mightmutate to form. a strain that causes cancer．Certainly the experimental evidence now available isconsistent with the idea that viruses as we know them today，could be the causative(引起……的)agents of most，if not all cancer。including cancer in mall． Cancer should be considered to be a biological problem rather than a medical one because_________．

A.viruses are known to cause cancer in animals

B.at present，human cancer is not believed to be contagious(传染的)

C.there are many known causes for the transformation of a normal cell to a cancer cell

D.results of experiments on plants and animals do not vary greatly from species to species

简述下列概念的区别：

species；strain

简述Gram Strain染色机制及其意义。