1. Chemistry of Life
Chapter 2

2. Why chemistry?
Remember atoms?

3. Subatomic particles
Two models of a helium atom
Carbon atom

4. Electrons

5. Chemical bonds
Three types

6. Ionic bonds

7. Formation of an ionic bond

8. Covalent bonds (make molecules)

9. Two types of covalent bonds
Nonpolar
Polar

10. Hydrogen bonds
The weakest bonds

11. Properties of water b/c of H-bonding
Water is a good solvent:

12. Properties of water b/c of H-bonding, cont.
Large heat capacity:
Low density as a solid:

13. Living systems are sensitive to acidic & basic conditions
Most water molecules present as H2O, but some molecules break apart into H+ ions and OH- ions

14. Living systems are sensitive to acidic & basic conditions
Even slight change in pH can be harmful

15. Living things are made from & conduct chemical reactions
A chemical reaction
Two parts to a chemical reaction

16. Types of macromolecules
Carbohydrates
Lipids
Proteins
Nucleic acids

17. Carbohydrates

18. Glucose . . .
is a

19. Polysaccharides two functions
Chitin is polysaccharide of disaccharide actylglucosamine

20. Polysaccharides

21. Types of macromolecules
Carbohydrates
Lipids
Proteins
Nucleic acids

22. Lipids
types of lipids

23. Fats (triglycerides)
two kinds of fat

25. Phospholipids

26. Phospholipid bilayer of a cell membrane

27. Sterols/steroids

28. Types of macromolecules
Carbohydrates
Lipids
Proteins
Nucleic acids

29. Proteins
chief building blocks of all life

30. Protein structure and function
denaturation
caused by

31. Types of macromolecules
Carbohydrates
Lipids
Proteins
Nucleic acids

32. Nucleic acids
DNA and RNA