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 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...
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...
