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

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

What Do You See?

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

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

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

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

Ionic Bonds An ionic bond is formed when one or more electrons are transferred from one atom to another

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

The Chemistry of Carbon Chain Ring Branching chain

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

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

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

Fatty Acids

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

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

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

Student Worksheet Answers

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

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