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...
Edexcel IGCSE Maths 復習筆記 2.3.1 Expanding Two Brackets - Basics What is expanding two brackets? When we expand brackets in algebra we ‘get rid of’ the brackets by multiplying out When we expand ...
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. th...
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 proceed...
Edexcel IGCSE Maths 復習筆記 2.2.2 Simple Factorisation What is simple factorisation? Simple Factorisation is the opposite of Expanding One Bracket Beware of minus signs Remember the basic rules: “...
Maths Skill: Using a Tangent to Find Initial Rate of Reaction For linear graphs (i.e. graphs with a straight-line), the gradient is the same throughout This makes it easy to calculate the ra...
