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

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

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.

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

Glucosephotosynthesis

chlorophyll

oxygen

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?

C6H12O6

C12H22O11

Fuctose.

Sucrose.

Starch reflects light has it as big molecules.

Glucose does not reflect light

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.

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)

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

37oC