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【多选题】
在下列哪种状态时机体处于正氮平衡A.
疾病期
B.
疾病恢复期
C.
生长发育期
D.
饥饿时
E.
老年期
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】如图是一所房子的示意图，图中数字表示房间号码，每间房子都与隔壁的房间相通．问能否从1号房间开始，不重复的走遍所有房间又回到1号房间？ 1 2 3 4 5 6 7 8 9
【简答题】催化dUMP转变为dTMP的酶是______，此酶的辅酶是______，它转运______给dUMP生成______dTMP。
【简答题】A．duck B．duty C．dust D．dump
【多选题】How is thymidylate derived from dCDP and dUMP?
A.
DNA contains thymine rather than uracil, and the de novo pathway to thymine involves only deoxyribonucleotides. The immediate precursor of thymidylate (dTMP) is dUMP. In bacteria, the pathway to dUMP begins with formation of dUTP, either by deamination of dCTP or by phosphorylation of dUDP. The dUTP is converted to dUMP by a dUTPase. The latter reaction must be efficient to keep dUTP pools low and prevent incorporation of uridylate into DN
B.
Conversion of dUMP to dTMP is catalyzed by thymidylate synthase. A one-carbon unit at the hydroxymethyl (–CH 2 OH) oxidation level is transferred from N 5 , N 10 -methylenetetrahydrofolate to dUMP, then reduced to a methyl group.
C.
The reduction occurs at the expense of oxidation of tetrahydrofolate to dihydrofolate, which is unusual in tetrahydrofolate-requiring reactions.
D.
The dihydrofolate is reduced to tetrahydrofolate by dihydrofolate reductase—a regeneration that is essential for the many processes that require tetrahydrofolate. In plants and at least one protist, thymidylate synthase and dihydrofolate reductase reside on a single, bifunctional protein.
【简答题】某国有工业企业, 2010 年度生产经营情况如下: ( 1 )销售收入 5 000 万元,销售成本 3 600 万元,主营业务税金及附加 140 万元。 ( 2 )其他业务收入 70 万元,其他业务支出 50 万元。 ( 3 )发生营业费用 300 万元、管理费用 500 万元、财务费用 200 万元。 ( 4 )发生营业外支出 160 万元。 ( 5 )投资收益 9 万元。 请计算该企业 201...
【单选题】对于爱立信设备，当用指令SYBUP做人工DUMP（）。
A.
只DUMP DS
B.
只DUMP DS&RS
C.
只DUMP DS&PS
D.
DUMP DS&RS&PS
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