一、目的基因( gene of irreresi)的获取 二、目的基因与载体结合成重组DIA 三、重组DNA分子引入受体细胞并表达 四、转化体细胞的扩增、鉴定与筛选

Many intracellular proteins are required to interact or bind to other macromolecules within a bind DNA. Such proteins often have conserved structural features, called motifs, whis at can cell in order to function properly. One class of such proteins is comprised of proteins tha interact with DNA. One such motif consists of two closely aligned a-helices(shown as cylinders below)that each have leucine-rich regions. This motif is referred to as a leucine

人体生命活动中所消耗的能量主要 来自生物氧化过程,因而氧是正常生命 活动不可缺少的物质。成人在静息状态 下每分种耗氧约250ml,若活动时,耗 氧明显增加。正常机体内氧的储备量 大约为1.5L左右

相貌离不开皮肤,尤其颜面部的皮肤 与美容的极其密切。皮肤的颜色主要取 决于表皮黑色素的含量。但表皮的厚薄 ,胡萝卜素等含量的多少,真皮血管的 血液供应也影响皮肤的颜色。 从生物学角度看,头发及毛发,甚至 指甲都可视为皮肤的延伸

1.正确识别各种类型茎 2.正确识别各种类型变态茎 3.区别攀援茎与缠绕茎、匍匐茎和平卧茎 4.茎在外形上与根的区别 5.解释概念:树皮周皮

病毒性皮肤病是由病毒感染所致的皮肤粘膜病变。根据病毒 性皮肤病的不同临床表现特点,可将其分为新生物型、疱疹 型、红斑发疹型。单纯疱疹是由单纯疱疹病毒感染所致的病 毒性皮肤病。皮疹以群集性小水疱为特征,能引起多种部位 感染,但以口周、鼻腔、生殖器等处好发。病程有自限性

Welcome to the course, which is an introduction to cultural or sociocultural anthropology We will have two lectures and one discussion a week Most of the requirements (a final exam, series of six papers adding up to about twenty pages; at least an hour a week of discussion)is set by the MIT Humanities Distribution system

Ethnography 1. INTRO Originally people who studied cultures were amateurs who happened to either be particularly observant or who happened to travel a lot. Some of them did more or less what people did today. a. Ibn Khaldun was a famous Arab scholar who did observations of everyone, including the Vikings

Anthropology and Moral Relativism Two stories: In 1960's and 70's a prominent Harvard psychologist named Jerome Bruner decided that it would be a good idea to expose young people to some of the concepts of social science, so he developed a curriculum called \Man: A Course

1、细胞如何从其环境中摄取能量回和还原能力? 2、细胞如何合成其大分子的构造单元? 这些过程是由许多高度整合、相互交织的化学反应来完成的,这些反应总称为代谢