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

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.

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

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

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”

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

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

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

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

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

6.3 Life Substances

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