哈佛和耶鲁大学法学院主动退出U.S. News排名！
哈佛大学、耶鲁大学的法学院宣布? 退出U.S. News法学院的年度排名? 为什么两所顶尖美国名校要做出这个决定？ 是否对U.S. News排名“权威”形成一种挑战？ 耶鲁大学：称霸32年，排名存在缺陷 耶鲁大学法学院院长Heat...
OCR A Level Biology:复习笔记2.4.3 Enzyme Activity: pH
Enzyme Activity: pH All enzymes have an?optimum pH?or a pH at which they operate best Enzymes are?denatured?at extremes of pH Hydrogen?and ionic bonds?hold the tertiary structure of the protein (ie...
CIE IGCSE Biology: 复习笔记：5.1.4 Enzymes & Temperature: Extended
CIE IGCSE Biology: 复习笔记：5.1.4 Enzymes & Temperature: Extended Enzymes & Temperature: Extended Enzymes are?proteins?and have a?specific shape, held in place by?bonds This is extremely i...
OCR A Level Biology:复习笔记2.4.2 Enzyme Action
Mechanism of Enzyme Action Enzymes have an?active site?where?specific substrates bind?forming an?enzyme-substrate complex The?active site?of an enzyme has a?specific shape?to fit a?specific substra...
OCR A Level Biology:复习笔记2.4.1 The Role of Enzymes
Enzymes as Catalysts Enzymes are?biological catalysts ‘Biological’ because they function in?living systems ‘Catalysts’ because they?speed up the rate of chemical reactions?without being?used up?or ...
OCR A Level Biology:复习笔记2.3.8 Translation
Translation Translation occurs?in the cytoplasm?of the cell After leaving the nucleus via a nuclear pore, the?mRNA molecule attaches to a ribosome In the cytoplasm, there are?free molecules of tRNA...
OCR A Level Biology:复习笔记2.3.7 Transcription
Transcription A?gene?is a?sequence of nucleotide bases?in a DNA molecule that?codes for the production of a specific sequence of amino acids, that in turn make up a?specific polypeptide?(protein) T...
OCR A Level Biology:复习笔记2.3.6 The Genetic Code
Nature of the Genetic Code A?gene?is a?sequence of nucleotides?that forms part of a DNA molecule (one DNA molecule contains many genes) This sequence of nucleotides (the gene)?codes for the product...
CIE IGCSE Biology: 复习笔记：5.1.3 Enzyme Action & Specificity: Extended
CIE IGCSE Biology: 复习笔记：5.1.3 Enzyme Action & Specificity: Extended Enzyme Action & Specificity: Extended Enzymes are?specific?to one particular substrate(s) as the?active site?of the ...
OCR A Level Biology:复习笔记2.3.5 DNA Replication
Semi-conservative Replication of DNA Before?a (parent) cell?divides, it needs to?copy the DNA?contained within it Doubling the DNA ensures that the two new (daughter) cells produced will both recei...
2022AMC10/12 B卷最新考情分析，预约获取AMC B卷中英试卷真题+答案+视频解析！
2022 AMC10/12 B卷今日落幕！ 同学们发挥得如何？ 与A卷对比后，难度是增是减了呢？ 翰林将尽快整理B卷的答案与解析 分析考试重难点和备考建议 并在静默期后第一时间发给大家 2022 AMC10/12 A+B卷（预约）? 中英...
OCR A Level Biology:复习笔记2.3.4 DNA Purification
DNA Purification Practical investigations can be conducted to?purify?(isolate)?DNA?via the process of?precipitation Isolating DNA?from cells is an essential?starting point?for a huge range of other...
