Session One (1.4.1): Carbohydrates and Testing for Carbohydrates

Introduction

Carbohydrate molecules include sugar, starch, and cellulose. They are built from atoms of carbon, hydrogen, and oxygen. They are rich in energy and are versatile molecules in that they can function as energy supplies or make structural components of cells such as cell walls in plants. You will learn about two standard food tests for different carbohydrates.

Reading

Read and make notes on pages 31-33 of your coursebook. Make sure you understand that glucose is a small carbohydrate molecule and can be joined together to make the very large polymer molecules called starch or cellulose.

Tasks

Add the definitions of the key words to your key word glossary file and or the Quizlett App. Complete the in-text questions and check your answers. Alternatives are given to the activities.

Links

Now work through the following resources:

WATCH - Testing for the starches in food (YouTube) Links to an external site.

WATCH - Benedict's Test (YouTube) Links to an external site.

WATCH - Food Tests - GCSE Science Required Practical (YouTube) Links to an external site.