Intro to Macromolecules

Intro to Macromolecules Pg. 19 – 29 (same pages for the next few classes)

What are macromolecules? Macromolecules – large molecules that are made up of repeating subunits Monomers(small molecules) Combine to form… Polymer(large/macromolecule)

Seriously though… • For the most part ‘macromolecules’ = ‘macronutrients’ Nutrient - __________definition?____________ • There are 4 types of macromolecules: • Carbohydrates • Lipids • Proteins • Nucleic acids* * = not something you gain from your diet

Organic molecules • Organic molecules are the chemicals of life • Contains some combination of C, H, N, O, P and S • Carbon usually forms the foundation or ‘back-bone’’(that’s where the term carbon-based life form comes from) • The shape of a molecule is determined by the bonds between its atoms (not much)

Naming carbon-only molecules Some common organic molecules consist only of carbon and hydrogen Methane Ethane Propane Butane Pentane

Drawing molecular structures • We can determine the shape of a molecule by building models of them • Each type of atom can form a set # of bonds • How do we know how many bonds an atom can make? • HONC-1234 Hydrogen Oxygen Nitrogen Carbon

Complete the table H|

Try these... Chemical name: ______ Chemical formula: ______ Structural formula: (draw it!)

Try these... Chemical name: glucose Chemical formula: ______ Structural formula: (draw it!)

When talking about food... • Macronutrients are: • Water • carbohydrates (carbs, sugars, etc.) • lipids (fats, oils, etc.) • protein (polypeptides, enzymes, etc.) • Micronutrients are: • vitamins (iron, D, etc.) • minerals (sodium, zinc, etc.)

Activity • Molecular modeling • Handout, Section #1 – 4 • Answers on a separate sheet (to be collected and graded)

Intro to Macromolecules