1. Revision Quiz Carbohydrates 1 1.What three elements do all carbohydrates contain 2.Why do we eat carbohydrates? 3.Sucrose is normally known as…… 4.What colour does iodine change in the presence of starch? 5.Name some starchy foods Carbon, hydrogen, oxygen For energy. sugar Blue black from brown Bread, pasta, rice

2. Revision Quiz Carbohydrates 2 1.What is respiration? 2.Write a word equation for this reaction 3.What gases are given out during respiration? 4.How could we prove this? 5.What do we call sweet tasting sugars? Slow burning of food to release energy Glucose + oxygen  carbon dioxide + water Carbon dioxide and water vapour Breathe out test with lime water – it will go milky saccharides

3. Revision Quiz Carbohydrates 3 1.Which raw materials are required for photosynthesis? 2.How do gases enter and leave a plant? 3.Which green substance do chloroplasts contain that allows them to absorb sunlight? 4.What is the waste product of photosynthesis? 5.In what form is food stored in plants? Water and carbon dioxide. Through the leaves. Chlorophyll. Oxygen. Starch.

4. Revision Quiz Carbohydrates 4 Complete the Diagram Water from roots via the _____ ______ ______ from air absorbed through the leaf Sunlight absorbed by the _________ _______ made by _____________ Waste product ________ removed through the leaf stem Carbon dioxide Glucose photosynthesis chlorophyll oxygen

5. Revision Quiz Carbohydrates 5 1.What is the molecular formula for glucose? 2.What is the molecular formula for maltose? 3.What is the isomer of glucose? 4.What is the isomer of maltose? 5.What is the Tyndall effect? C 6 H 12 O 6 C 12 H 22 O 11 Fuctose. Sucrose. Starch reflects light has it as big molecules. Glucose does not reflect light

6. Revision Quiz Carbohydrates 6 1.Which raw materials are required for photosynthesis? 2.How do gases enter and leave a plant? 3.Which green substance do chloroplasts contain that allows them to absorb sunlight? 4.What is the waste product of photosynthesis? 5.In what form is food stored in plants? Water and carbon dioxide. Through the leaves. Chlorophyll. Oxygen. Starch.

7. Revision Quiz Carbohydrates 7 1.What is the colour change for Benedict’s Solution? 2.Name three reducing sugars (give positive Benedict’s’ tests) 3.Name three non reducing sugars (give negative Benedict’s tests) 4.Name 2 carbohydrate polymers 5.Which saccharide gives a negative Benedict’s and iodine tests Blue  Brick Red Glucose, fructose and maltose Starch, cellulose and sucrose Starch and cellulose Sucrose (Cellulose)

8. Revision Quiz Carbohydrates 8 1.Splitting up large sugars into smaller sugars is called? 2.What do we call it when small sugars join together to make large sugars? 3.What is an enzyme? 4.What 2 conditions affect enzyme activity? 5.At what temperature does salivary amylase work best? Hydrolysis Condensation (polymerisation) Biological catalyst Temperature and pH 37 o C