题目内容

收藏纠错

题目材料：

A mouse`s immune system generally rejects proteins different from those produced by that mouse. The immune system of a pregnant mouse does not, however, reject the mouse`s fetuses, although the fetal tissue a fetus produces as it develops typically contains many such proteins. Some scientists hypothesize that the placenta surrounding the fetus physically blocks the mother`s immune system. But others, noting that the placenta produces IDO, an enzyme that suppresses the immune system, hypothesize that IDO plays a crucial role in protecting the fetus.

第1题

In order to choose between the two hypotheses, it would be most useful to determine which of the following?

AWhether mice sometimes produce IDO when they are not pregnant
BWhether the immune systems of fetal mice are capable of attacking the tissue of the mother
CWhether there are cases in which the immune system of a pregnant mouse rejects some fetuses but not others
DWhether IDO is the only substance capable of suppressing the immune system produced by mice
E Whether the immune systems of pregnant mice that are given a drug that inhibits IDO production subsequently reject the fetus.

E显示答案

登录后才可以添加做题笔记哦，还没有账号？马上注册

以上解析由考满分老师提供。

题目讨论

已经输入 0 个字标记为提问，会有更多小伙伴帮你解答提交

全部讨论

只看提问

按时间排序

按点赞数排序

拓展练习

练习记录

最新提问

题目内容

题目讨论