1. Welcome to Class! 9-21 and 9-22 Complete the following:  New entry “Four Biomolecules”  Do you vocabulary #5

2. Agenda  Lecture notes on Four Biomolecules  Concept Maps  Create Model of Four Biomolecules  Homefun:  Vocab assigned due next class (print out)

3. What Do You See?

4. Atoms The subatomic particles that make up atoms are protons, neutrons, and electrons.

5. Elements An element is a pure substance that consists entirely of one type of atom. Atomic number = 6

6. Isotopes Because they have the same number of electrons, all isotopes of an element have the same chemical properties. 6 6 6 6 6 6 6 7 8

7. Compounds and Molecules Sodium atom (Na) Chlorine atom (Cl) Water (H 2 O) Compound Molecule

8. Ionic Bonds An ionic bond is formed when one or more electrons are transferred from one atom to another. -11 0 -17 0 -10 +1 -18

9. Covalent Bonds A covalent bond is formed when atoms share electrons. Electrons in oxygen: Total electrons: 8 10

10. The Chemistry of Carbon Chain Ring Branching chain

11. Biomolecules Monomers Polymer Biomolecules are large organic molecules found in living things.

13. https://www.youtube.com/watch?v=ZMTeq ZLXBSo

14. Carbohydrates Polymer Monomer PolysaccharideMonosaccharide Living things use carbohydrates as sources of energy and for structural purposes.

15. Lipids Unsaturated Lipids are a large and varied group of biomolecules that are not generally soluble in water.

16. Fatty Acids

17. Nucleic Acids Nucleic acids are polymers made of nucleotide monomers. Nitrogenous base 5-carbon sugar Phosphate group

18. Proteins Proteins are polymers made of amino acid monomers. Amino group: - NH 2 Carboxyl group: - COOH Amino group Carboxyl group Peptide bond

19. Protein Structure A protein is a functional molecule built from one or more polypeptides.

20. Student Worksheet Answers

21. Making Models Make a three-dimensional model of a nucleic acid or a protein. Include a key of your model showing what each part represents. Nitrogenous base 5-carbon sugar Phosphate group

22. Write a reflection on the structures and functions of each of the 4 biomolecules