Transcript Revision Quiz Fuels 1

Revision Quiz Carbohydrates 1
1. What three elements do all carbohydrates contain
Carbon, hydrogen, oxygen
2. Why do we eat carbohydrates?
For energy.
3. Sucrose is normally known as……
sugar
4. What colour does iodine change in the presence of starch?
Blue black from brown
5. Name some starchy foods
Bread, pasta, rice
Revision Quiz Carbohydrates 2
1. What is respiration?
Slow burning of food to release energy
2. Write a word equation for this reaction
Glucose + oxygen  carbon dioxide + water
3. What gases are given out during respiration?
Carbon dioxide and water vapour
4. How could we prove this?
Breathe out test with lime water – it will go milky
5. What do we call sweet tasting sugars?
saccharides
Revision Quiz Carbohydrates 3
1. Which raw materials are required for photosynthesis?
Water and carbon dioxide.
2. How do gases enter and leave a plant?
Through the leaves.
3. Which green substance do chloroplasts contain that allows them
to absorb sunlight?
Chlorophyll.
4. What is the waste product of photosynthesis?
Oxygen.
5. In what form is food stored in plants?
Starch.
Revision Quiz Carbohydrates 4
Complete the Diagram
Waste product
________
oxygen removed
through the leaf
Sunlight
absorbed by
the
chlorophyll
_________
_______
Glucose made by
photosynthesis
_____________
Water
from roots
via the
stem
_____
______
Carbon ______
dioxide from
air absorbed through
the leaf
Revision Quiz Carbohydrates 5
1. What is the molecular formula for glucose?
C6H12O6
2. What is the molecular formula for maltose?
C12H22O11
3. What is the isomer of glucose?
Fuctose.
4. What is the isomer of maltose?
Sucrose.
5. What is the Tyndall effect?
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?
Water and carbon dioxide.
2. How do gases enter and leave a plant?
Through the leaves.
3. Which green substance do chloroplasts contain that allows them
to absorb sunlight?
Chlorophyll.
4. What is the waste product of photosynthesis?
Oxygen.
5. In what form is food stored in plants?
Starch.
Revision Quiz Carbohydrates 7
1. What is the colour change for Benedict’s Solution?
Blue  Brick Red
2. Name three reducing sugars (give positive Benedict’s’ tests)
Glucose, fructose and maltose
3. Name three non reducing sugars (give negative Benedict’s tests)
Starch, cellulose and sucrose
4. Name 2 carbohydrate polymers
Starch and cellulose
5. Which saccharide gives a negative Benedict’s and iodine tests
Sucrose
(Cellulose)
Revision Quiz Carbohydrates 8
1. Splitting up large sugars into smaller sugars is called?
Hydrolysis
2. What do we call it when small sugars join together to make large
sugars?
Condensation (polymerisation)
3. What is an enzyme?
Biological catalyst
4. What 2 conditions affect enzyme activity?
Temperature and pH
5. At what temperature does salivary amylase work best?
37oC