A.RNA聚合酶核心酶-DNA-pppGpN-OH B.RNA聚合酶核心酶-DNA-引物-ppPGpN’-OH C.RNA聚合酶全酶-DNA-引物-pppGpN’-OH D.RNA聚合酶全酶-DNA-pppGpN’-OH E.亞基-DNA-pppGpN’-0H
A.乙酸B.鉻酸C.二甲苯D.乙醇E.甲醛
A.媒染劑 B.藍化劑 C.分化劑 D.促染劑 E.氧化劑
A.氧(O) B.氮(N) C.氫(H) D.碳C. E.磷(P)
A.尼氏小體 B.神經(jīng)軸突 C.星形細胞 D.神經(jīng)髓鞘 E.神經(jīng)纖維