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19 Cards in this Set
- Front
- Back
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Autotroph |
Organism that makes its own food using energy from the environment and carbons from inorganic molecules such as C02 |
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Chlorophyll a |
Main photosynthetic pigment in plants Occurs in some bacteria Absorbs violet, red, and orange light, and it reflects green light, so it appears green to us. |
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Heterotroph |
Organism that obtains carbon from organic compounds assembled by other organisms Ecosystem's consumers |
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Pigment |
An organic molecule that can absorb light of certain wavelengths |
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Wavelength |
Distance between the crests of two successive waves Measured in nm |
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Light dependent reactions |
First stage of photosynthesis; convert light energy to chemical energy. Makes ATP Main pathway in chloroplasts splits water molecules and releases O2. ADP. ATP NADP+ NADPH H20. O2 Energy. > |
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Light independent reactions |
Second stage of photosynthesis; use ATP and NADPH to assemble sugars from water and CO2. (Calvin-Benson cycle) ATP. ADP NADPH. NADP+ CO2. sugars H20 |
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Stroma |
The cytoplasm like fluid between the thylakoid membrane and the two outer membranes of a chloroplast |
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Thylakoid membrane |
A chloroplast's highly folded inner membrane system; forms a continous compartment in the stroma |
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Electron transfer phosphorylation |
Process in which electron flow through electron transfer chains sets up a hydrogen ion gradient that drives ATP formation. |
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Photolysis |
Process by which light energy breaks down a molecule |
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Photosystem |
Cluster of pigments and proteins that converts light energy to chemical energy in photosynthesis. |
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C3 plant |
Type of plant that uses the Calvin-Benson cycle to fix carbon. Three carbon molecule (PGA) is the first stable intermediate in their light independent reactions |
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C4 plant |
Type of plant that minimizes photo respiration by fixing carbon twice, in two cell types. 4 carbon compound |
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Calvin Benson cycle |
Cyclic carbon fixing pathway that builds sugars from CO2; the light independent reactions of photosynthesis. |
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CAM plant |
Type of plant that conserves water by fixing carbon twice, at different times of day. (Crassolacean and metabolism) Fix carbon twice, but the reactions occur at different times rather than in different cells. |
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Carbon fixation |
Process by which carbon from an inorganic source such as carbon dioxide gets incorporated into an organic molecule |
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Photorespiration |
Reaction in which rubisco attaches oxygen instead of carbon dioxide to ribulose bisphosphate |
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Rubisco |
Ribulose bisphosphate carboxylase. Carbon fixing enzyme of the Calvin Benson cycle. |
