7.B細胞由製造IgM轉變成IgA,透過下列何種機制達成?
(A)DNA轉位(transposon)
(B)DNA重組(recombination)
(C)DNA修復(repair)
(D)DNA擴增(amplification)
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統計: A(268), B(1636), C(36), D(27), E(0) #3064052
統計: A(268), B(1636), C(36), D(27), E(0) #3064052