Download BIOENERGETICS SUMMARY File

Bioenergetics:
The study of energy flow into and within an organism
Energy Transformations-energy changes from one form to another: some is lost (environment)
Photosynthesis: Chemical reaction
 Occurs in Chloroplast
 Electromagnetic energy is captured by chlorophyll
 Store potential chemical energy in the bonds of carbohydrates
In: Electromagnetic energy (sunlight)
Out: Chemical Energy (sugar: Glucose)
Cell Respiration: Chemical reaction
 Occurs in Mitochondria
 Transfer the chemical energy from the bonds of “food” to the bonds in ATP
In: Chemical Energy (food)
Out: Chemical Energy (ATP)
Comparing Photosynthesis and Cell Respiration
Process
Reactants
Products
(Materials needed)
(Materials produced)
Photosynthesis
Carbon dioxide (CO2)
Glucose (C6H12O6) sugar)
Water (H2O)
Oxygen (O2)
Cellular Respiration
Sugar or other food
ATP
Oxygen (O2)
Carbon dioxide (CO2)
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ATP-Adenosine tri (3) phosphate
 Energy molecule used in biochemical reactions
 Contains phosphate bonds
 Food must be converted to ATP so the energy can be used by an organism
 ATP is the only energy an organism can use directly
 Adenosine diphosphate + Phosphate = ATP
 provides energy for cellular reactions and processes. ATP releases energy when one of
its high-energy bonds is broken to release a phosphate group.
ATP cycle:
In: Sun or food
Out: Energy for work
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