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PHOTOSYNTHESIS (Plant Nutrition) = Capturing & transferring the energy of sunlight into _______________ energy AUTOTROPHS (vs. Heterotrophs) Ex. Green plants, MANY protists (algae), some bacteria PHOTOSYNTHETIC PIGMENTS _________________ – most abundant & important photosynthetic pigments 2 types found in plants Both types ABSORB ______________ & _____________ and REFLECT _______________ so plants do not grow well in ___________ light Chlorophyll a – is the primary photosynthetic pigment directly involved in converting light energy to chemical energy CHLOROPLASTS = site of ____________________ _____________ = stacks of photosynthetic __________________ These membranes contain the photosynthetic pigments (Ex. Chlorophyll) _____________ = protein-containing material that fills rest of chloroplast CHEMISTRY of PHOTOSYNTHESIS 2 TYPES of REACTIONS 1. Light-Dependent – take place in the ___________ in the presence of light These reactions produce high energy compounds _____& ______ Light reactions take place in the ____________ 2. Light-Independent = Dark Reactions = Calvin Cycle – use this energy to make _______________ Dark reactions take place in the ____________ LIGHT-DEPENDENT REACTIONS PHOTOLYSIS Water is split by _______________ acting on the pigment ____________ in the _______________ . Electrons are released and used to create high energy Compounds ATP, NADPH O2 is also released. light O2 to atmosphere energy H2O from soil ATP to dark reactions 2. LIGHT-INDEPENDENT REACTIONS (“Dark Reactions”) Energy for the dark reactions is provided by ______ from the light reactions CO2 from the atmosphere enters the leaves through ____________. These are tiny holes controlled by specialized cells called _____________cells. CO2 enters the stroma, where carbon fixation occurs through many enzymecontrolled reactions called the Calvin Cycle. Glucose is produced. ATP from light reactions CO2 from atmosphere Summary of Photosynthesis Glucose !!