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2.9 Photosynthesis
| Question | Answer |
|---|---|
| photosynthesis | production of carbon compounds in cells using light energy |
| organelle where photosynthesis occurs | chloroplast |
| starting reactants of photosynthesis | CO2 and H2O |
| final products of photosynthesis | glucose and O2 |
| range of visible light | 700nm to 400nm: red, orange, yellow, green, blue, indigo, violet |
| chlorophyll | main site of light absorption in light dependent stage |
| chlorophyll a | absorbs red and violet light |
| chlorophyll b | absorbs blue and orange light |
| color chlorophyll reflects | green |
| action spectrum and absorption spectrum | absorption spectrum shows the wavelengths absorbed whereas action spectrum shows the rate for each wavelength |
| chromatography | -used to separate photosynthetic pigments -pigments include chlorophylls, carotenes, etc -indetified by Rf value |
| Rf value | distance moved by spot/distance moved by solvent |
| fixation | conversion of an inorganic form of an element to an organic form |
| limiting actors of photosynthesis | temperature, light intensity, CO2 concentration |
| role of limiting actors | change rate of photosynthesis |
| effect of temperature | bell curve |
| effect of light | plateaus |
| effect of CO2 concentration | plateaus |
| effects of increasing oxygen | oceans: had large amounts of iron that became oxidized, atmosphere: initially had trapped oxygen, rocks: have iron ore and oceans rocks precipitate down into the sediment |
| structure and function of a chloroplast relationship | thylakoids: space for H+ to accumulate, grana: thylakoids increase surface area, stroma: proper enzyme and light for LIR |
| location of light dependent reaction | thylakoids |
| products of light dependent reaction | O2, ATP, NADPH |
| photolysis of water | lights splits water molecules, making O2 and H+ |
| noncyclic phosphorylation | ps 1 and 2 absorb light, ps2's excited electrons move through ETC, ps2 electrons replace ps21 electrons, photolysis of water replaces ps2 electrons |
| products of noncyclic phosphorylation | ATP and NADPH+ |
| phosphorylation through chemiosmosis | High H+ concentration in thylakoid, chemiosmosis causes H+ to return to stroma, travels through ATP synthase, produces ATP |
| cyclic phosphorylation | ps 1 absorbs light, excited electrons travel down ETC, electrons produce ATP, electrons return to ps 1 |
| products of cyclic phosphorylation | ATP |
| light dependent reaction | light excites electrons in ps 1 and 2, electrons travel through ETCs in noncyclic and cyclic, ATP is made through phosphorylation, photolysis produces O2 and H+ |
| Melvin Calvin | used a lollipop apparatus to track radioactive carbon in chlorella and then used paper chromatography to look at the fixation of carbon |
| products of LDR needed in LIR | NADPH and ATP |
| location of light independent reaction | stroma |
| action spectrum and absorption spectrum relationship | positive correlation with large peak at blue and smaller peak at red |
Created by:
luciepike
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