Biological Molecules

A collection of videos and experiments that are suitable for Biology.

2.5 Elements in biological molecules
Recall the chemical elements present in carbohydrates, proteins and lipids (fats and oils)

2.6 Biological Molecules
Describe the structure of carbohydrates, proteins and lipids as large molecules made up from smaller basic units: starch and glycogen from simple sugar; protein from amino acids; lipid from fatty acids and glycerol

2.7 Test Starch and Glucose
Describe the tests for glucose and starch

Try out our new and fun Fraction Concoction Game.

Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.

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