单项选择题
每个单体Ig分子均由( )条多肽链组成 A.
二 B.
三 C.
四 D.
五
每个单体Ig分子均由( )条多肽链组成 A.
二 B.
三 C.
四 D.
五
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单项选择题
Which one is correct about tumor suppressor genes? ()
Which one is correct about tumor suppressor genes? ()
A.Has the effect of inhibiting cell proliferation
B.Normally expressed in all tumor cells
C.Does not affect cell proliferation and differentiation after deletion
D.Not present in normal human cells
E.Not related to oncogene expression