AQA Biological Molecules

1. Introduction to Biological
Molecules
Biological Molecules Lesson 1

2. Quick Questions
 Sketch an atomic diagram for the following…
- Hydrogen
- Carbon
- Oxygen
 How would you define metabolism?
All the chemical processes that take place in living
organisms
 What is a polymer?
Long chains of monomer subunits joined together

3. Today’s lesson –
Introduction to Biological Molecules
We need to be able to answer:
1.Describe what a mole is.
2.What is a molar solution?
3.Explain what bonding is.
4.Explain how molecules are formed.
5.Describe polymerisation.
6.What is a macro molecule?
7.Describe hydrolysis and condensation.
8.Describe metabolism.
Language we will be using:
1.Mole
2.Bonding
3.Polar
4.Condensation
5.Hydrolysis
6.Metabolism

4. The mole and molar solution
• The Mole is the SI Unit for measuring the
amount of a substance
• One mole contains the same number of
particles as there are in 12g of Carbon-12
(6.022 x 1023
atoms - 6.022 x 1023
is the
Avogadro number)
• A molar solution contains 1 mole in 1L of
solution

5. Bonding and how molecules are
formed

6. Types of bonding

7. Polymerisation

8. Polymerisation produces macromolecules
• When we build these biological molecules we
release water. This is known as a
‘condensation’ reaction

9. Polymerisation
• When we break these biological molecules
down we use water. This is known as a
‘hydrolysis’ reaction

12. Today’s lesson –
Introduction to Biological Molecules
We need to be able to answer:
1.Describe what a mole is.
2.What is a molar solution?
3.Explain what bonding is.
4.Explain how molecules are formed.
5.Describe polymerisation.
6.What is a macro molecule?
7.Describe hydrolysis and condensation.
8.Describe metabolism.
Language we will be using:
1.Mole
2.Bonding
3.Polar
4.Condensation
5.Hydrolysis
6.Metabolism