甘肃省天水市第一中学2018_2019学年高二生物下学期第一次学段考试试题理(扫描版).doc

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1、1甘肃省天水市第一中学 2018-2019 学年高二生物下学期第一次学段考试试题 理(扫描版)23456789天水一中高二级 20182019 学年度第二学期第一学段考试生物答案(理科)一、选择题(每题 1 分,共 40 分)15 D C D D B 610 D B C D A 1115 D D C C B 1620 C C C C C 2125 A C D C A 2630 B C C A B 3135 B C A B D 3640 B D A B A二、非选择题(60 分)41 (每空 2 分,共 14 分)1518蛋白酶逐层加盐,随着层数的加高增加盐量,接近瓶口表面的盐要铺厚一些随水流失

2、香辛料和料酒蛋白酶6042 (每空 1 分,共 8 分)醋酸 好氧 利于酵母菌进行繁殖;防止发酵旺盛时汁液溢出 酸性重铬酸钾3035 适时通过充气口充气 43 (每空 2 分,共 14 分)(1)检测培养基平板灭菌是否合格 3.810 7 (2) 灼烧 将聚集的菌体逐步稀释以便获得单个菌落 (3) B (4)溶解氧 营养物质 44 (每空 2 分,共 14 分)(1)平板划线 稀释涂布平板 (2)敏感 不敏感 该致病菌对 C 的敏感性比 A 的弱 耐药性(3)A45 (每空 2 分,共 10 分)(1)开水使血中的蛋白质变性而沉淀,难以清洗蛋白酶丙 碱性条件下只有蛋白酶丙有活性(2)不合理 蛋白酶会降解脂肪酶10

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