2.7 to 2.14B - Biological Molecules, Food Tests, Enzymes (and Core Prac) (IGCSE Biology 9-1 - Edexcel)

**IGCSE (Edexcel) Biology (9-1) **

2.7 identify the chemical elements present in carbohydrates, proteins and lipids (fats and oils)
2.8 describe the structure of carbohydrates, proteins and lipids as large molecules made
up from smaller basic units: starch and glycogen from simple sugars, protein from
amino acids, and lipid from fatty acids and glycerol
2.9 practical: investigate food samples for the presence of glucose, starch, protein and fat
2.10 understand the role of enzymes as biological catalysts in metabolic reactions
2.11 understand how temperature changes can affect enzyme function, including changes
to the shape of active site
2.12 practical: investigate how enzyme activity can be affected by changes in temperature
2.13 understand how enzyme function can be affected by changes in pH altering the active site
2.14B practical: investigate how enzyme activity can be affected by changes in pH

Six lessons on biological molecules topic in IGCSE 9-1 biology. Exam questions included within lessons where available (including marking schemes). Core practical review lesson included.

Any and all feedback appreciated