CIE IGCSE Biology: 复习笔记：5.1.3 Enzyme Action & Specificity: Extended Enzyme Action & Specificity: Extended Enzymes are specific to one particular substrate(s) as the active site of the ...
CIE IGCSE Biology: 复习笔记：5.1.2 Enzyme Investigations Investigating the Effect of Temperature on Amylase Starch solution is heated to a set temperature Iodine is added to wells of a spotting til...
Chromatography Chromatography is a technique that can be used to separate a mixture into its individual components Chromatography relies on differences in the solubility of the different chemicals ...
CIE IGCSE Biology: 复习笔记：5.1.1 Enzymes What Are Enzymes? Enzymes are: Catalysts that speed up the rate of a chemical reaction without being changed or used up in the reaction Proteins Biologica...
Finding the Concentration of a Substance Benedict’s solution can be used to carry out a semi-quantitative test on a reducing sugar solution to determine the concentration of reducing sugar present ...
CIE IGCSE Biology: 复习笔记：4.1.3 DNA Structure: Extended Structure of a DNA Molecule: Extended DNA, or deoxyribonucleic acid, is the molecule that contains the instructions for growth and develop...
Biochemical Tests: Proteins The Biuret test can be carried out quickly and easily in a lab to determine if a sample contains proteins Biuret ‘reagent’ contains an alkali and copper (II) sulfate whi...
CIE IGCSE Biology: 复习笔记：4.1.2 Food Tests Food Tests Test for glucose (a reducing sugar) Add Benedict's solution into sample solution in test tube Heat at 60 - 70 °c in water bath for 5 minutes...
Inorganic Ions An ion is an atom (or sometimes a group of atoms) that has an electrical charge An ion that has a +ve charge is known as a cation An ion that has a -ve charge is known as an anion &n...
