• 2022-06-18 问题

    Blood glucose is the concentration of ( ) in the blood A: Feuctose B: Ribose C: Glucose D: Lactose

    Blood glucose is the concentration of ( ) in the blood A: Feuctose B: Ribose C: Glucose D: Lactose

  • 2022-06-11 问题

    Factors that contribute to calcium absorption, except(<br/>) A: Lactose B: 1,25 -(OH)2VD3 C: Acidic conditions D: Fatty acids

    Factors that contribute to calcium absorption, except(<br/>) A: Lactose B: 1,25 -(OH)2VD3 C: Acidic conditions D: Fatty acids

  • 2022-06-10 问题

    以下哪个物质是乳糖操纵子的诱导物? A: Glucose 葡萄糖 B: cAMP C: Allolactose 异乳糖 D: Lactose 乳糖

    以下哪个物质是乳糖操纵子的诱导物? A: Glucose 葡萄糖 B: cAMP C: Allolactose 异乳糖 D: Lactose 乳糖

  • 2022-05-31 问题

    The common classification of Staphylococci according to ( ) A: whether produce SPA or not B: different biochemical event and pigments C: K antigen of cell surface D: lactose fermenters

    The common classification of Staphylococci according to ( ) A: whether produce SPA or not B: different biochemical event and pigments C: K antigen of cell surface D: lactose fermenters

  • 2022-06-15 问题

    2.If you don`t receive treatment for hyperglycemia ,in order to produce energy, your body turns to____ as an alternative source of energy. A: Fat and proteins B: Fat C: Proteins D: Lactose

    2.If you don`t receive treatment for hyperglycemia ,in order to produce energy, your body turns to____ as an alternative source of energy. A: Fat and proteins B: Fat C: Proteins D: Lactose

  • 2022-06-18 问题

    Diarrhea from infection or malnutrition is the world's most prevalent killer of children. A 2-month-old Caucasian girl develops chronic diarrhea and liver inflammation in early infancy when the mother begins using formula that includes corn syrup. Evaluation of the child demonstrates sensitivity to fructose in the diet. Which of the following glycosides contains fructose and therefore should be avoided when feeding or treating this infant A: Sucrose B: Ouabain C: Lactose D: Maltose E: Streptomycin

    Diarrhea from infection or malnutrition is the world's most prevalent killer of children. A 2-month-old Caucasian girl develops chronic diarrhea and liver inflammation in early infancy when the mother begins using formula that includes corn syrup. Evaluation of the child demonstrates sensitivity to fructose in the diet. Which of the following glycosides contains fructose and therefore should be avoided when feeding or treating this infant A: Sucrose B: Ouabain C: Lactose D: Maltose E: Streptomycin

  • 2022-05-30 问题

    大肠杆菌生长在含乳糖(Lactose)的培养基时,其乳糖操纵组会被活化,此操纵组的三个基因产物中含半乳糖苷酶(beta-galactosidase),故可用半乳糖苷酶活性大小,代表乳糖操纵组的活化程度。某科学家以不同细菌数量(以细菌干重表示)在乳糖及IPTG(一种细胞中的乳糖衍生物)等两种诱导物作用下,检测半乳糖脢的活性,获得结果如下图:依据题图,下列有关两种诱导物的叙述何者正确?() A: 乳糖对乳糖操纵组的诱导能力比IPTG强 B: IPTG对乳糖操纵组操作子的作用能力比乳糖强 C: 由数据显示,细胞内能活化乳糖操纵组的诱导物只有IPTG D: 诱导产生相同活性的半乳糖苷酶,乳糖约只要IPTG的1/40

    大肠杆菌生长在含乳糖(Lactose)的培养基时,其乳糖操纵组会被活化,此操纵组的三个基因产物中含半乳糖苷酶(beta-galactosidase),故可用半乳糖苷酶活性大小,代表乳糖操纵组的活化程度。某科学家以不同细菌数量(以细菌干重表示)在乳糖及IPTG(一种细胞中的乳糖衍生物)等两种诱导物作用下,检测半乳糖脢的活性,获得结果如下图:依据题图,下列有关两种诱导物的叙述何者正确?() A: 乳糖对乳糖操纵组的诱导能力比IPTG强 B: IPTG对乳糖操纵组操作子的作用能力比乳糖强 C: 由数据显示,细胞内能活化乳糖操纵组的诱导物只有IPTG D: 诱导产生相同活性的半乳糖苷酶,乳糖约只要IPTG的1/40

  • 2022-05-30 问题

    大肠杆菌生长在含乳糖(Lactose)的培养基时,其乳糖操纵组会被活化,此操纵组的三个基因产物中含半乳糖苷酶(beta-galactosidase),故可用半乳糖苷酶活性大小,代表乳糖操纵组的活化程度。某科学家以不同细菌数量(以细菌干重表示)在乳糖及IPTG(一种细胞中的乳糖衍生物)等两种诱导物作用下,检测半乳糖脢的活性,获得结果如下图:据实验结果,下列何种推论最合理?() A: 诱导物愈多,每一细菌中的乳糖操纵组的活性愈强 B: 诱导物愈多,每一细菌中的半乳糖苷酶数量随着增加 C: 诱导物愈多,每一细菌中的乳糖操纵组数量随着增加 D: 在任一细菌量下,诱导物浓度与半乳糖苷酶活性皆呈正比关系 E: 在此两种诱导物刺激下,细菌量与半乳糖苷酶活性皆呈正比关系

    大肠杆菌生长在含乳糖(Lactose)的培养基时,其乳糖操纵组会被活化,此操纵组的三个基因产物中含半乳糖苷酶(beta-galactosidase),故可用半乳糖苷酶活性大小,代表乳糖操纵组的活化程度。某科学家以不同细菌数量(以细菌干重表示)在乳糖及IPTG(一种细胞中的乳糖衍生物)等两种诱导物作用下,检测半乳糖脢的活性,获得结果如下图:据实验结果,下列何种推论最合理?() A: 诱导物愈多,每一细菌中的乳糖操纵组的活性愈强 B: 诱导物愈多,每一细菌中的半乳糖苷酶数量随着增加 C: 诱导物愈多,每一细菌中的乳糖操纵组数量随着增加 D: 在任一细菌量下,诱导物浓度与半乳糖苷酶活性皆呈正比关系 E: 在此两种诱导物刺激下,细菌量与半乳糖苷酶活性皆呈正比关系

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