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9 Cards in this Set
- Front
- Back
What are 3 light harvesting systems? |
1. LH1 & LH2 of purple bacteria (flower-looking thing) 2. Chlorosomes of green sulfur bacteria 3. Phycobilins in cyanobacteria (hand fan-like) |
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How is CO2 converted to carbs? |
by dark reactions--> ATP and NADH/NADPH made by phototrophy reduce CO2 |
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What are the 3 carbon fixation pathways? |
1. Calvin cycle 2. Reverse TCA cycle 3. 3- Hydroxypropionate cycle |
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How did they discover use of Calvin cycle |
used lollipop device. 14CO2 injected & samples removed to see where 14C went Used TLC & autoradiography |
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Need to knows on TCA Cycle |
1. carboxylation 2. Reduction 3. Regeneration - Need NADH/NAPH & ATP -- Uses RuBisCO & PRK (KEY RXNS) |
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What does RuBisCO do? |
2 competing rxns: 1. uses O2 to produce 1 PGA & 1 PPG 2. |
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What is 1 carbon concentration mechanism? |
1. carboxysomes of cyanobacteria protein shell tightly controls what chemicals pass into/out of compartment |
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What is another carbon concentrating mechanism? |
Inducible high affinity transporters maximize uptake of CO2 and HCO3- |
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What drives reverse TCA cycle? |
ATP and reduced Fd from light dependent rxns There are multiple entry points for CO2 If you see ATP citrate lyase, automatically think reverse TCA!!! |