Study Biology notes on Biological Molecules for IGCSE. Useful for revision, homework, and exam preparation in Zimbabwe.
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This is the CIE IGCSE Biology notes. It is a free notes for revision.
save myexams CIE IGCSE Biology Revision Notes savemyexams.co.uk 4 BIOLOGICAL MOLECULES CONTENTS: 4.1 CARBOHYDRATES, FATS \& PROTEINS 4.2 FOOD TESTS 4.3 DNA STRUCTURE 4.4 WATER VIEW EXAM QUESTIONS YOUR NOTES 4.1 CARBOHYDRATES, FATS \& PROTEINS Chemical Elements - Most of the molecules in living organisms fall into three categories: carbohydrates, proteins and lipids - These all contain carbon and so are described as organic molecules MOLECULE | CHEMICAL ELEMENTS CARBOHYDRATE | CARBON, OXYGEN AND HYDROGEN PROTEIN | ALL CONT AIN CARBON, OXYGEN, HYDROGEN AND NITROGEN AND SOME CONT AIN SMALL AMOUNTS OF OTHER ELEMENTS SUCH AS SULPHUR LIPID | CARBON, OXYGEN AND HYDROGEN Carbohydrates - Long chains of simple sugars - Glucose is a simple sugar ( a monosaccharide) - When 2 glucose molecules join together maltose is formed (a disaccharide) - When lots of glucose molecules join together starch, glycogen or cellulose can form (a polysaccharide) CIE IGCSE Biology Resources REVISION NOTES | TOPIC QUESTIONS PAST PAPERS Page 1 c) copyright Save My Exams