45
Photosynthesis&CellRespiration
● Inthespringthereismoregrowth(springgrowth)andinthesummerthereisless
ater
w
● Photosynthesisisalight-gatheringbiochemicalpathwaythatfixesCO2 tomakesugar
(glucose)
● Biochemicalpathways
○ Seriesofenzymescontrolledreactionsthatproduceproducts
■ Photosynthesishastwopathways
● Lightreactions(lightdependent)
○ Requireslight
● Lightindependentreactions
○ “Darkreactions”
● Autotrophsareself-nourishingorusephotosynthesis
○ Plants
○ Algae-lacktissuedifferentiation
● Heterotrophsareothernourishingorusingcellrespiration
○ Animals
○ Fungus
● Photosynthesisequation
○ Light+H2O+CO2 →C2 H12O6+ O2
○ Balancedequation:
■ Light+6H2O+6CO2 →C6 H12O6+6O2
○ Notanactualchemicalequation,itisarepresentativeequation,justshowing
thelawofconservation
○ Notassimple
● Chloroplast-mayhavebeenacellatonetime
○ Functionstogatherlighttomakeglucose
○ Structureofachloroplast
■ Stroma
● Jelly-likenutrient-richsubstancethatsurroundsthethylakoids
● Siteofthelight-independentreactions
● Whereenzymesarefound
● Similartothecytoplasm
■ Thylakoids
● Photosyntheticmembranes
● Siteofthelightreactions
● Housesthephotosyntheticpigments
○ Chlorophylls-2ofthem
○ Orangepigments-Carotenes
○ Yellowpigments-Xanthophylls
■ Granam
, 46
● lural-grana
P
● Stacksofthylakoids
○ Diagram
● Lightsarepacketsofenergythattravelinwaves
● (CH3)ChlorophyllA-
○ Greenpigment(lighttealgreen)
○ Absorblightintheredandbluerange
○ Reactioncenter
● (CHO)ChlorophyllB-
○ Greenpigment(brightlimegreen)
○ Absorblightintheredandbluerange
● Accessorypigments
Photosynthesis&CellRespiration
● Inthespringthereismoregrowth(springgrowth)andinthesummerthereisless
ater
w
● Photosynthesisisalight-gatheringbiochemicalpathwaythatfixesCO2 tomakesugar
(glucose)
● Biochemicalpathways
○ Seriesofenzymescontrolledreactionsthatproduceproducts
■ Photosynthesishastwopathways
● Lightreactions(lightdependent)
○ Requireslight
● Lightindependentreactions
○ “Darkreactions”
● Autotrophsareself-nourishingorusephotosynthesis
○ Plants
○ Algae-lacktissuedifferentiation
● Heterotrophsareothernourishingorusingcellrespiration
○ Animals
○ Fungus
● Photosynthesisequation
○ Light+H2O+CO2 →C2 H12O6+ O2
○ Balancedequation:
■ Light+6H2O+6CO2 →C6 H12O6+6O2
○ Notanactualchemicalequation,itisarepresentativeequation,justshowing
thelawofconservation
○ Notassimple
● Chloroplast-mayhavebeenacellatonetime
○ Functionstogatherlighttomakeglucose
○ Structureofachloroplast
■ Stroma
● Jelly-likenutrient-richsubstancethatsurroundsthethylakoids
● Siteofthelight-independentreactions
● Whereenzymesarefound
● Similartothecytoplasm
■ Thylakoids
● Photosyntheticmembranes
● Siteofthelightreactions
● Housesthephotosyntheticpigments
○ Chlorophylls-2ofthem
○ Orangepigments-Carotenes
○ Yellowpigments-Xanthophylls
■ Granam
, 46
● lural-grana
P
● Stacksofthylakoids
○ Diagram
● Lightsarepacketsofenergythattravelinwaves
● (CH3)ChlorophyllA-
○ Greenpigment(lighttealgreen)
○ Absorblightintheredandbluerange
○ Reactioncenter
● (CHO)ChlorophyllB-
○ Greenpigment(brightlimegreen)
○ Absorblightintheredandbluerange
● Accessorypigments