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3g/mi n±1g/mi n, 27g/mi n±7g/mi n 27g/mi n±7g/mi n, 3g/mi n±1g/mi n 3g/mi n±0. 1g/mi n, 27g/mi n±0. 7g/mi n 27g/mi n±0. 7g/mi n, 3g/mi n±0. 1g/mi n
f(x)<g(x)<h(x) g(x)<f(x)<h(x) g(x)<h(x)<f(x) h(x)<g(x)<f(x)
G30,G31,G32,G33; G26,G27,G28,G29; G41,G42,G43,G44; G80,G81,G82,G83。
27%A,31%G,22%T和20%C 24.5%A,25.5%G,24.5%T和25.5%C 22%A,20%G,27%T和31%C 25.5%A,24.5%G,25.5%T和24.5%C
3/7 4/7 log23/log27 (log235)/7
,31%G.,22%T.和20%C.。那么,RF 中的碱基构成情况是 ( ) A.27%A.,31%G.,22%T.和20%C. 24.5%A.,2 5.5%G.,24.5%T.和2 5.5% C.22%A.,20%G.,27%T.和31%C. 25.5%A.,24.5%G.,25.5%T.和24.5%C.
MCV(fl)80~92;MCH(pg)27~31;MCHC(g/L) 320~360 MCV(fl)>92;MCH(pg)>31;MCHC(g/L)<320 MCV(fl)>92;MCH(pg)>31;MCHC(g/L)320~360 MCV(fl)<80;MCH(pg)<27;MCHC(g/L)<320 MCV(fl)<80;MCH(pg)<27;MCHC(g/L)320~360
274g/L 251g/L 345g/L 365g/L 385g/L
∶T.∶G.∶C.=1∶2∶3∶4。则有关该DNA分子的叙述,错误的是 A.该基因片段的碱基对之间是以氢键相连 该基因片段连续复制两次,需要游离的腺嘌呤脱氧核苷酸180个 该基因片段中4种含氮碱基A.∶T.∶G.∶C.=3∶3∶7∶7 该基因片段中的碱基A.+T的量始终等于C.+G的量。
27%A,31%G,22%T和20%C 24.5%A,25.5%G,24.5%T和25.5%C 22%A,20%G,27%T和31%C 25.5%A,24.5%G,25.5%T和24.5%C
G.、U.三种碱基可构成多少种核苷酸( ) A.3种 4种 2种 5种
3/7 4/7 log23/log27 (log235)/7