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Lecture: ATP and Intro Lecture: ATP and Intro to Photosynthesisto Photosynthesis
and Cellular and Cellular RespirationRespiration
Energy and ATPEnergy and ATP Energy comes in many different formsEnergy comes in many different forms
Light, heat, electrical, chemical, etcLight, heat, electrical, chemical, etc Cells are powered by chemical energyCells are powered by chemical energy ATP- Adenosine Triphosphate- principle ATP- Adenosine Triphosphate- principle
compound used by all living things to fuel life compound used by all living things to fuel life processesprocesses Energy is in the bonds between phosphate groupsEnergy is in the bonds between phosphate groups Like a rechargeable battery, ATP- A charged battery, Like a rechargeable battery, ATP- A charged battery,
ADP-a dead batteryADP-a dead battery
Energy and Energy and CarbohydratesCarbohydrates
Carbs are much better for storing energy, 1 Carbs are much better for storing energy, 1 molecule of glucose has over 90x more energy molecule of glucose has over 90x more energy than a molecule of ATP!than a molecule of ATP!
Carbohydrates like glucose are made by Carbohydrates like glucose are made by autotrophs (producers) through photosynthesis autotrophs (producers) through photosynthesis or chemosynthesisor chemosynthesis
Photosynthesis occurs in the chloroplastPhotosynthesis occurs in the chloroplast Equation for Photosynthesis:Equation for Photosynthesis:
6CO6CO22 + 6H + 6H22O + energy O + energy C C66HH1212OO66 + 6O + 6O22
Carbon + water+ light Carbon + water+ light sugar + sugar + oxygenoxygen
dioxidedioxide
Cellular RespirationCellular Respiration Release of energy from food occurs in the Release of energy from food occurs in the
mitochondriamitochondria Most common pathway of obtaining Most common pathway of obtaining
energy from food occurs in the presence energy from food occurs in the presence of oxygen= of oxygen= cellularcellular respirationrespiration Aerobic organismsAerobic organisms
Equation for Cellular Respiration:Equation for Cellular Respiration:
6O6O2 2 ++ CC66HH1212OO66 6CO 6CO22 + 6H + 6H22O + O + energy energy
Oxygen + sugar Oxygen + sugar carbon + water + … carbon + water + …
dioxidedioxide
Sunlight energy
ECOSYSTEM
Photosynthesisin chloroplasts
GlucoseCO2
O2H2O
Cellular respirationin mitochondria
(for cellular work)
Heat energy
ATP
Physiological Energy Flow Physiological Energy Flow SummarySummary