A.UTPB.UDPC.UMPD.IMPE.dUMP能直接转变生成dUDP的化合物是
A.UTP
B.UDP
C.UMP
D.IMP
E.dUMP
B.UDP
C.UMP
D.IMP
E.dUMP
能直接转变生成dUDP的化合物是
参考解析
解析:体内核糖核苷酸在核糖核苷酸还原酶的催化下绝大多数能直接还原生成脱氧核糖核苷酸,这种还原作用是在核苷二磷酸水平上进行的,即NDP-dNDP,如UDP-dUDP,但脱氧胸腺嘧啶核苷酸的生成与以上不同,它是在核苷一磷酸水平上,由脱氧尿嘧啶核苷酸(dUMP)经甲基化而生成的,即dUMP-dTMP,催化此反应的酶是TMP合酶(胸苷酸合酶)。UTP能直接转变生成CTP。UMP能直接转变生成UDP。IMP能直接转变生成AMP和GMP。
相关考题:
Two buildings on the San Jose campus of a small company must be connected to use Ethernet with a bandwidth of at least 100 Mbps. The company is concerned about possible problems from voltage potential differences between the two buildings. Which media type should be used for the connection()。A.UTP cableB.STP cableC.coaxial cableD.fiber optic cable
( )的特点是设备便宜、带宽高,但传输距离有限,易受室内空气状态影响。A.UTP B.同轴电缆C.红外D.微波