1. Biochemistry: Chemistry Basics
AP Biology
Biochemistry: Chemistry Basics

2. Duroia hirsuta

3. Most Common Elements in all life forms

4. LE 2-4
Cloud of negative
charge (2 electrons)
Electrons
Nucleus

5. Molecule: Same element

6. Molecule: Different elements

7. Energy and Atoms
Third energy level (shell)
Energy
absorbed
Second energy level (shell)
First energy level (shell)
Energy
lost
Atomic
nucleus

8. Valence Electrons

9. Covalent Bonds

10. POLAR MOLECULE – O H H + +
H2O

11. Ionic Bonds

12. SALT
Na+
Cl–

13. HYDROGEN BONDS – + + – + + + Water (H2O) Hydrogen bond Ammonia
(NH3) + + +

14. Van der Waals Interactions
e e e-
e e-
e e-
NUCLEUS