CIE IGCSE Biology: 復習筆記：6.1.1 Photosynthesis
CIE IGCSE Biology: 復習筆記：6.1.1 Photosynthesis Photosynthesis Green plants make the carbohydrate?glucose?from the raw materials?carbon dioxide?and?water At the same time?oxygen?is ...
OCR A Level Biology:復習筆記2.5.2 Membrane Structure & Permeability
Factors Affecting Membrane Structure & Permeability The?permeability?of?cell membranes?is affected by different?factors?or conditions, such as: Temperature Solvent concentration Temperat...
CIE IGCSE Biology: 復習筆記：5.1.5 Enzymes & pH: Extended
CIE IGCSE Biology: 復習筆記：5.1.5 Enzymes & pH: Extended Enzymes & pH: Extended The optimum pH for most enzymes is 7 but some that are produced in acidic conditions, such as the stomach, h...
OCR A Level Biology:復習筆記2.5.1 The Cell Surface Membrane
Roles of Membranes Membranes are?vital?structures found in all cells The?cell surface membrane?creates an enclosed space separating the internal cell environment from the external environment Intra...
2022-23CTB賽制和流程更新，火熱報名組隊中！
關注社科實踐活動的家長和同學對CTB應該并不陌生。全球青年研究創新論壇CTB，由哈佛商學院和清華大學經管學院學者聯合啟動，旨在讓中國青年心懷家國立足身邊，提出原創本土解決方案，在世界舞臺發聲。 CTB 2022-2...
OCR A Level Biology:復習筆記2.4.9 Practical: Measuring Enzyme Activity
Practical: Measuring Enzyme Activity The?progress?of?enzyme-catalysed reactions?can be investigated by: Measuring the?rate of formation of a product Measuring the?rate of disappearance of a substra...
OCR A Level Biology:復習筆記2.4.8 Coenzymes, Cofactors & Prosthetic Groups
Coenzymes, Cofactors & Prosthetic Groups There are substances?other than?substrates and inhibitors that?interact?with?enzymes Some enzymes can only?function properly?if another?non-protein subs...
OCR A Level Biology:復習筆記2.4.7 Enzyme Activity: Enzyme Inhibitors
Enzyme Inhibitors Reversible inhibitors An enzyme's activity can be reduced or stopped,?temporarily, by a?reversible inhibitor There are?two types?of reversible inhibitors: Competitive?inhibitors h...
OCR A Level Biology:復習筆記2.4.6 Enzyme Activity: Substrate Concentration
Enzyme Activity: Substrate Concentration The?greater?the?substrate concentration, the?higher?the?rate of reaction: As the number of substrate molecules increases, the likelihood of enzyme-substrate...
OCR A Level Biology:復習筆記2.4.5 Enzyme Activity: Enzyme Concentration
Enzyme Activity: Enzyme Concentration Enzyme concentration affects the rate of reaction The?higher?the?enzyme concentration?in a reaction mixture, the?greater the number of active sites?available a...
OCR A Level Biology:復習筆記2.4.4 Enzyme Activity: Temperature
Enzyme Activity: Temperature Enzymes have a specific?optimum temperature This is the temperature at which they catalyse a reaction at the?maximum rate Lower temperatures?either?prevent?react...
哈佛和耶魯大學法學院主動退出U.S. News排名！
哈佛大學、耶魯大學的法學院宣布? 退出U.S. News法學院的年度排名? 為什么兩所頂尖美國名校要做出這個決定？ 是否對U.S. News排名“權威”形成一種挑戰？ 耶魯大學：稱霸32年，排名存在缺陷 耶魯大學法學院院長Heat...
