Structures of the 20 Amino Acids The Zwitterion used to explain the physical and chemical properties of amino acids Reactions with sodium hydroxide, sodium carbonate & copper (II) sulfate solution Formation of a Dipeptide Formation of a Polypeptide A summary of the Secondary Structure of Proteins The alpha helix secondary structure of Proteins The beta-pleated sheets secondary structure of Proteins The tertiary structure of a Protein Comparing Fibrous and Globular Proteins Enzyme lock and key mechanism and influence of temperature and pH on their activity Protein Hydrolysis

Revise for GCSE Chemistry with this video from Frankly Chemistry.

Revise for GCSE Chemistry with this video from Frankly Chemistry.

This video from Frankly Chemistry we use the results to calculate the concentration of ethanoic in vinegar.

This video from Frankly Chemistry demonstrates the experiment and explains the results in detail.

This video from Frankly Chemistry the calculation is carried out to determine the concentration of ammonia solution using 0.1M sulphuric acid.

This video from Frankly Chemistry attempts to explain why metals are both malleable and ductile - in terms of layers of cations that can slide over one another - while de-localised electrons prevent repulsions between them.

This video from Frankly Chemistry explains where to download the Excel Workbook and how to use it.

This video from Frankly Chemistry outlines and explains how an organic solid is purified using recrystallisation.

This video from Frankly Chemistry looks in considerable detail at solvent extraction - a technique used in organic chemistry to remove impurities from a product.

This video from Frankly Chemistry takes an in-depth look at the bonding and structures of two group 4 oxides: carbon dioxide and silicon dioxide (silica).

This video from Frankly Chemistry shows different sides of purple chrom alum crystals as they grow under magnification.

This video from Frankly Chemistry background theory is outlined, including the need to obtain a 'calibration graph'.

This video from Frankly Chemistry shows Job's Method which is used to determine the stoichiometry of the reaction between copper (II) ions and ammonia in solution.

This video from Frankly Chemistry Laboratory preparation of Hydrogen Chloride Gas and Hydrochloric Acid.

This video from Frankly Chemistry shows Inorganic and then Organic observations and deductions.

This video from Frankly Chemistry takes an in-depth look at the mechanism for the reaction between propene and hydrogen bromide.

This video from Frankly Chemistry looks at the chemistry of alkenes.

This video from Frankly Chemistry looks at how formulae can be used to determine an enthalpy of reaction from either enthalpies of combustion or formation.

This video from Frankly Chemistry contains 8 structured questions on practical chemistry for GCE.