1. 6.3 Life Substances Carbon has 4 spots for bonding. Can make rings or chains to form LARGE molecules elmhurst.edu/~chm/vchembook/images/522propene.GIF

2. 6.3 - Metabolism Cell metabolism is the process (or really the sum of many ongoing individual processes) by which living cells process nutrient molecules and maintain a living state. metabolism has two distinct divisions: –anabolism, in which a cell uses energy and reducing power to construct complex molecules and perform other life functions such a creating cellular structure; and –catabolism, in which a cell breaks down complex molecules to yield energy and reducing power.

3. 6.3 Life Substances Biomolecule – a large organic compound –10-1000s of C atoms. Polymer – a lg. molecule formed from several sm. molecules bonding together.

4. Carbohydrates Main Function- Energy Contain __, __, & __ Polymer of single sugars Monosaccharide- small sugar –Glucose Disaccharide – 2 sugars –Sucrose

5. Carbohydrates –Polysaccharide - Examples Used by plants to store E Used by animals to store E in muscle and liver Add strength to plant’s cell walls “Dietary Fiber”

6. Lipids Functions –Energy storage –Forming the membranes around our cells. –Hormones and vitamins Lots of ___ and ___, some ___ Examples- –Fats, oils, waxes, and steroids

7. Lipids Made up of fatty acids and ______ FATS OILS biology.clc.uc.edu/Courses/bio104/lipids.htm

8. Proteins The most important! Contain ___, ___, ___, ____, ____ Functions –Provide structure for tissues –Carry out cell metabolism (a.k.a everything) Polymer of amino acids(aa) –Peptide bonds link each aa student.ccbcmd.edu/.../images/peptidebond.jpg

9. Proteins Enzymes- changes the rate of a chem- ical rxn. –Lock and keyLock and key

10. Nucleic Acids Functions –Stores cellular info in code. –DNA, RNA Polymer of nucleotides

11. 6.3 Life Substances

12. Source http://bioweb.wku.edu/courses/BIOL115/Wyatt/