Photosynthesis

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Photosynthesis
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Background Photosynthesis

• Chemical Reaction in Living Things
• Energy Conversion
• Reactants (substances needed)
• Products (new substances created)

• Reactants of Photosynthesis
• Carbon dioxide (CO2)
• Water (H2O)
• Products of Photosynthesis
• Glucose (C6H12O6)
• Oxygen (O2)

• Energy of Photosynthesis
• Energy of Sunlight to the energy of food (sugar)
• Light Energy to Chemical Energy
• Making Food From Sunlight

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Equation Photosynthesis
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Steps Photosynthesis
Step 1 Light Reactions Location Chloroplast
(Grana)
Step 2 Dark Reactions Location Chloroplast
(stroma)
Oxygen (O2)

Carbon dioxide (CO2)
Water (H20)
ATP NADPH
Glucose (C6H12O6)
chlorophyll
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• Occurs in Autotrophs
• Plants
• Some Protists
• Some Bacteria

Occurs in the Chloroplast Chlorophyll and
Enzymes are Needed
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Summary Photosynthesis
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Summary Photosynthesis
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Respiration
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Releasing Energy From Sugar (glucose) Converting
Energy in Food to the Only Form of Energy that a
Living Cell Can Use Directly The Only Form of
Living Energy That Can Be Used Directly is ATP
(adenosine triphosphate)
Respiration Can Occur With Oxygen (aerobic) or
Without Oxygen (Fermentation)
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Background Respiration

• Chemical Reaction in Living Things
• Energy Conversion
• Reactants (substances needed)
• Products (new substances created)

• Reactants of Respiration
• Glucose (C6H12O6)
• Oxygen (O2)
• Products of Respiration
• Carbon dioxide (CO2)
• Water (H2O)

• Energy of Respiration
• Energy of food to the energy of ATP (adenosine
  triphosphate)
• Chemical Energy to Living Energy (used
  immediately)
• Releasing Energy from Food to Remain Living
  Carry Out Necessary Life Functions

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Equation Respiration
Aerobic Respiration (Respiration with Oxygen)
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Steps Aerobic Respiration
Step 1 Glycolysis (in cytoplasm)
Step 2 3 Krebs Cycle Electron Transport
Chain (in mitochondrion)

Glucose (C6H12O6)
Pyruvic acid
Carbon dioxide (CO2)
Water (H20)
2 ATP
34 ATP
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Steps Fermentation (Anaerobic Respiration)
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Occurs in ALL LIVING THINGS Autotrophs
Heterotrophs Bacteria (Prokaryotes), Protists,
Fungi, Plants, Animals
Occurs in the Cytoplasm (fermentation)
Mitochondria (aerobic respiration) Enzymes are
Needed
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Photosynthesis Respiration
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Energy light energy

Organelle chloroplast
Releases glucose, oxygen
Function photosynthesis
Needs carbon dioxide, water, chlorophyll
Releases carbon dioxide, water
Organelle mitochondria
Function aerobic respiration
Needs oxygen, glucose, enzymes
Energy ATP
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Aerobic Respiration
Anaerobic Respiration
Photosynthesis
reactants O2 glucose products CO2
water enzymes needed energy released 36
ATP organelle mitochondria step
1 glycolysis step 2 Krebs cycle Step 3
electron transport chain equation O2 glucose
--gt CO2 water
reactants glucose only products lactic acid
or CO2 alcohol enzymes needed energy
released 2 ATP organelle cytoplasm step
1 glycolysis step 2 fermentation equation g
lucose --gt C3H6O3 or CO2 alcohol
reactants CO2 water products O2
glucose enzymes chlorophyll energy
absorbed sunlight, ATP, NADPH organelle chlorop
last step 1 light reactions step 2 dark
reactions equation CO2 water --gt O2
glucose
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Detailed Overview Respiration