澳洲AMC考试2022即将开赛,抓紧时间备赛!
相较于美国AMC,澳洲数学学术活动(澳洲AMC)对初次参加考试或者比赛的新生比较友好,澳洲3年级的小朋友就可以参加学术活动。澳洲AMC考试2022即将开赛!今天不如就让我们一起来了解一下这项风靡全球的数学国际学...
相较于美国AMC,澳洲数学学术活动(澳洲AMC)对初次参加考试或者比赛的新生比较友好,澳洲3年级的小朋友就可以参加学术活动。澳洲AMC考试2022即将开赛!今天不如就让我们一起来了解一下这项风靡全球的数学国际学...
Vmax & the Michaelis-Menten Constant Substrate concentration affects the rate of catalysis in an enzyme-substrate reaction When the substrate concentration is fixed (and enzyme concentration is...
Rate: Inhibitor Concentration There are two types of inhibitors: Competitive inhibitors have a similar shape to that of the substrate molecules and therefore compete with the substrate for the acti...
Rate: 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 and the grea...
Rate: 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. the enzym...
Rate: Temperature Enzymes have a specific optimum temperature – the temperature at which they catalyse a reaction at the maximum rate Lower temperatures either prevent reactions from proceeding or ...
Colorimetry to Measure Enzyme Activity A colorimeter is able to measure light absorbance (how much light is absorbed) or light transmission (how much light passes through) a substance Colorimetry c...
Measuring Enzyme Activity The progress of enzyme-catalysed reactions can be investigated by: Measuring the rate of formation of a product using catalase Measuring the rate of disappearance of a sub...
How Enzymes Work The lock-and-key hypothesis Enzymes are globular proteins This means their shape (as well as the shape of the active site of an enzyme) is determined by the complex tertiary struct...
Mode 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 substrate Ex...
Enzymes as Proteins 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 c...
怡和奖学金是什么?怡和奖学金是专门资助亚洲杰出青年,前往剑桥大学和牛津大学学习。奖学金包括3-4年的学费、杂费、生活费以及每年一次往返国际旅费,可以说是四舍五入等于留学不要钱! 01 怡和奖学金介绍 怡和...
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