Warm Up What are the relationship between CELLULAR RESPIRATION and PHOTOSYNTHESIS? CELLULAR RESPIRATION – the splitting apart of glucose by water to produce carbon dioxide and energy PHOTOSYNTHESIS – the splitting apart of water by energy to produce glucose from carbon dioxide, with oxygen given off

What is Photosynthesis? Takes Place in Plant’s Leaves Conversion of Light Energy Provides Chemical Energy Base of Almost All Food Chains

The “Typical” Plant Cell Cell Wall Vacuole Chloroplasts

Photosynthesis

Overall Reaction CO2 + H2O sunlight Sugar + O2 Chlorophyll Chlorophyll and sunlight must be present Takes place in a series of two reactions Light reaction=first Calvin Cycle=second

Photosynthesis

Are ALBINO(white) trees possible? Albino (no melanin), melanin provides color

Light Reaction Dependent on sunlight (photons) Takes place in chloroplasts (thylakoid membrane) Reactants Products H2O O2 Light ATP NADPH Overall Reaction H2O sunlight/chlorophyll O2 + ATP + NADPH

Calvin Cycle “Dark Reaction” Takes place in chloroplasts (stroma) Does not require photons Requires products of light reaction Reactants CO2 ATP NADPH Produces usable energy Glucose

Comparison of the two Light Dark Thylakoid-grana stroma Reaction Light Dark Site of Occurrence Thylakoid-grana stroma Initial Requirement (Reactants) Light Energy, water, and chlorophyll A ATP, NADPH, and CO2, End Product ATP, NADPH, Oxygen Glucose, water, NADP, ADP and inorganic phosphate