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【单选题】
中的竖向构件包括哪些构件A.
基础构件
B.
梁构件
C.
板构件
D.
柱构件
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【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】某公路上有一面大镜子，从镜子中看到汽车的车辆的号码如图 所示， 则该汽车的号码是（ ）。
【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...
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