1. CELLS & ENERGY Ch's 6&7 Need energy to: move change shape
repair structure
make new cell parts
transport food
expel wastes

2. Sun is ultimate source of energy
Autotrophs – make own food
Heterotrophs – eat other orgs
Energy is obtained through Biochemical Pathways
= linked chemical reactions
(product of one is reactant of another)

3. 2 Important Pathways
Photosynthesis- Light energy converted to chemical energy of organic compounds (carbs)
Autotrophs only
Cellular Respiration- Organic compounds broken down to produce energy in a form a chemical compounds ATP
Autotrophs & Heterotrophs

4. PHOTOSYNTHESIS 6CO2 + 6H20 + solar energy C6H12O6 + 6O2
Occurs in leaves where chloroplasts are abundant

5. Plants contain pigments (compounds that absorb light)
Chlorophyll – reflects green light (green leaves); uses red & blue
Carotenoids – reflect yellow, orange, brown (fruits/flowers)

6. CELLULAR RESPIRATION C6H12O6 + 6O2 6CO2 + 6H2O + energy
Process by which all organisms release energy stored in organic molecules
Connection between photosynthesis and respiration

7. 2 STAGES
In cytoplasm Glucose is broken down: 2 smaller molecules result.
In mitochondria those 2 molecule combine to Oxygen to form CO2

8. Fermentation is a type of respiration in which some organism converts a carbohydrate, such as starch or a sugar, into an alcohol or an acid. For example, yeast perform fermentation to obtain energy by converting sugar into alcohol. Bacteria perform fermentation, converting carbohydrates into lactic