Nucleotide Structure & the Phosphodiester Bond Both DNA and RNA are?polymers?that are made up of?many repeating units?called?nucleotides Each nucleotide is formed from: A?pentose sugar?(...
大家都知道今年AP成績的正式放榜時(shí)間是7月5日，但是這兩天AP考試中心的副總裁特雷弗·帕克（Trevor Packer），突然連夜在社交平臺(tái)上陸續(xù)發(fā)布了2022年的AP成績的5分率數(shù)據(jù)！ 這份數(shù)據(jù)包括了五門科目的成績，分別為...
Practical Skill: Control of Variables & Uncertainty Enzyme rate experiments?are experiments that are carried out to determine the?effect?of?changing?a particular?factor?on the?rate of a ...
Students should be able to: Appreciate the Models & Functions of Enzyme Action Models of enzyme action Scientists often use?models?to explain their observations from experiments As techn...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.3.2 Expanding Two Brackets - Harder Hidden FOIL (aka spot the hidden brackets) Always write (a + b)2?as (a + b)(a + b) Beware of minus signs Remember the basic rules:...
Enzyme Inhibitors An enzyme's activity can be reduced or stopped, temporarily, by a reversible inhibitor There are?two types?of reversible inhibitors: Competitive?inhibitors have a?similar s...
Rate: 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 com...
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...
Maths Skill: Calculating pH If the?hydrogen ion?(H+) concentration of a solution is known, the?pH?can be calculated using the equation: pH?=?-log?? [H?] You can find the?‘log’?function on yo...
