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biology- chapter 8

photosynthesis

QuestionAnswer
Overall reaction: formula & words; products & reactants Formula: 6 CO2 + 6 H20 --> C6H1206 + 6 O2 Products: sugar (glucose) & oxygen Reactants: carbon dioxide & water
Pigment used: how is it used? How is it activated? What happens when it is activated? Pigment: Chlorophyll Used: Absorbs light (all colors except green) [light is a form of energy; any compound that absorbs light absorbs energy] Activated: when it absorbs light
Where does it take place? in the chloroplast!
Parts of the chloroplast: know all three, colors produced Parts: Photosystem:light-colecting units of the chloroplast Thylakoid:saclike photosynthetic membran Stroma: the space outiside the thylakoid membranes Grana:stacks of thylakoids\
Two processes of photosynthesis: names Light-dependent reactions Light-independent reactions (calvin cycle)
Two processes of photosynthesis:where they occur Light-dependent: thylakoid membrane Light-independent: stroma
Rate dependent on...: why/how does light intensity affect the rate of reaction? increase light --> increase rate of photosynthesis after a certain level is reached, plant reaches its maximum rate of photosynthesis
Two processes of photosynthesis: reactants of each process & products of each process Light-Dependent: Reactants:ADP & H2O & NADP+ Products: O2 & ATP & NADPH Light-Independent: Reactants: ATP & NADPH Products: Sugar (& Water)
Rate dependent on... Water ; Temperature ; Light intensity
Rate dependent on...: why/how does water & temperature affect the rate of reaction? Water: water is one of the raw materials of photosynthesis --> a shortage of water can slow or stop photosynthesis Temperature: enzymes work best at 0-35 Celsius. Temperatures +/- damage enzymes, slowing down (or stopping) rate of photosynthesis
What is NECESSARY for this to happen? water - raw material (reactant) of photosynthesis
Plant Pigment Lab: what were we trying to find out? What did we find out? trying to find out: what plant pigments can be found in differenct colored leaves? Found out: spinach (green leaf) contains carotenes, chlorophyll a & b, & xanthophyll Red leaf: contains anthocyanin, xanthophyll, and carotenes
What happens when the pigment is activated? When chlorophyll absorbs light, much of the energy is transferred directly to electrons in the chlorophyll molecule, raising the energy levels of these electrons. These high energy e- make photosynthesis work.
Created by: forever09
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