OCR Applied Science Level 3 - Module 21: Product Testing Techniques. This PowerPoint presentation with worked examples and student activities covers: Topic 2.2 of Module 21: Product Testing Techniques. 2.2 Laboratory testing during development i.e.: • formulation • production • quality control and assurance • after sale monitoring.

OCR Applied Science Level 3 - Module 21: Product Testing Techniques. This PowerPoint presentation with worked examples and student activities covers: Topic 2.3 of Module 21: Product Testing Techniques. 2.3 Effectiveness of test • Appropriate test method • Data collection validity and reliability • Consistent chemical composition • Hazards and risks of use

This two lesson presentation covers OCR Gateway Biology 9-1 B1.4.2 Photosynthesis Experiments This PowerPoint is a whole lessons included with student activities and animated answers. The positive test for starch Experimental procedure for testing starch in leaves. Testing for the need of chlorophyll for photosynthesis. Testing for the need of light for photosynthesis. Testing for the need of carbon dioxide for photosynthesis. Testing oxygen produced via photosynthesis. Testing light intensity affects photosynthesis.

This PowerPoint presentation with worked examples and student activities covers: Topic 4.4 of Module 1: Science Fundamentals of the OCR Applied Science Spec. Complex carbohydrates (starch, glycogen, cellulose) • Carbohydrates found as monosaccharides, disaccharides, or polysaccharides (monomers, dimers or polymers) • Monomers held together by glycosidic bonds to form dimers and polymers, via condensation reactions • Monosaccharides include glucose, fructose and galactose • Disaccharides include maltose, sucrose and lactose • Polysaccharides include starch, glycogen and cellulose • Cellulose is found in plant cell walls where it provides strength/support and pliability • Starch and glycogen are energy sources Proteins and peptides from amino acids • Dipeptides are formed from two amino acids joined by a peptide bond, via a condensation reaction • Polypeptides are chains of amino acids joined by peptide bonds • Proteins/polypeptides have physiological or functional roles, including enzymes, carrier proteins in the plasma membrane, and structural roles, including collagen and elastin fibres in connective tissue Lipids from fatty acids, glycerol and phosphorus compounds • Monoglycerides, diglycerides and triglycerides are esters of fatty acids and glycerol • An ester bond forms between each fatty acid and the glycerol, via condensation reactions • Phospholipids contain glycerol plus two fatty acids and a phosphate group • Lipids act as an energy source within cells, as an insulation layer around animal organs, in the myelin sheath (found around some nerve fibres/axons) to increase speed of nerve transmission • Phospholipids form a bilayer in the plasma membrane Protein synthesis (transcription, translation) RNA, messenger, ribosomal and transfer • The nucleic acids, DNA and RNA, are polymers of nucleotides • Peptide bonds form between amino acids to create polypeptide chains/proteins • Recall a simple description of protein synthesis