AQA A Level Biology復習筆記1.5.4 The Structure of RNA
The Structure of RNA Like DNA, the nucleic acid RNA (ribonucleic acid) is a?polynucleotide?– it is made up of?many nucleotides?linked together in a chain Like DNA, RNA nucleotides contain th...
Edexcel IGCSE Maths 復習筆記 2.3.3 Expanding Three Brackets
Edexcel IGCSE Maths 復習筆記 2.3.3 Expanding Three Brackets Expanding three brackets We’re still following the basic principle of expanding here – get rid of the brackets by multiplying out We just...
AQA A Level Biology復習筆記1.5.3 The Structure of DNA
The Structure of DNA The nucleic acid DNA is a?polynucleotide?– it is made up of?many nucleotides?bonded together in a?long chain A DNA nucleotide DNA molecules are made up of?two pol...
AQA A Level Biology復習筆記1.5.2 Nucleotide Structure & the Phosphodiester Bond
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?(...
2022年5門AP成績提前曝光！7月5日正式放分，5分率最低的科目是哪個？
大家都知道今年AP成績的正式放榜時間是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上陸續發布了2022年的AP成績的5分率數據！ 這份數據包括了五門科目的成績，分別為...
AQA A Level Biology復習筆記1.4.14 Practical Skill: Controlling Variables & Calculating Uncertainty
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 ...
AQA A Level Biology復習筆記1.4.13 Models & Functions of Enzyme Action
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 復習筆記 2.3.2 Expanding Two Brackets - Harder
Edexcel IGCSE Maths 復習筆記 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:...
AQA A Level Biology復習筆記1.4.12 Limiting Factors Affecting Enzymes: Inhibitors
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...
AQA A Level Biology復習筆記1.4.11 Limiting Factors Affecting Enzymes: Substrate Concentration
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...
AQA A Level Biology復習筆記1.4.10 Limiting Factors Affecting Enzymes: Enzyme Concentration
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...
AQA A Level Biology復習筆記1.4.9 Maths Skill: Calculating pH
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...
