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16 Cards in this Set
- Front
- Back
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Photosynthesis occurs in plants, algae and certain bacteria, producing...
In 1930s, it was found that not all photosynthetic bacteria formed... Who is the father of microbial photosynthesis? What is it called when no O2 produced? |
Oxygen
Oxygen Van Neil Anoxygenic |
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What are the two reactions of photosynthesis? What do use to function and what do they generate or fix?
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Photophosphorylation aka light reactions use light to generate ATP and reduce NADPH + H+
The Dark Reactions use ATP and NADPH to fix CO2 in the Calvin cycle |
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What are the principal light energy trapping molecules found in plants, algae and certain bacteria?
They are Porphyrin ring molecules with BLANK in the center and long chain BLANK What are the 3 types found in plants, algae and cyanobacteria? |
Chlorophylls
Mg; alcohol Chlorophyll a, b, and c |
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What are similar in structure to those in plants, but different side chains? They can be used to BLANK bacteria.
Describe the 5 types. Which types are seen in purple phototrophic bacteria? What about green phototrophic bacteria? |
Bacteriochlorophylls; classify
Bacteriochlorophyll c,d and e. have Abs peaks between 400 and 650 nm; Bacteriochlorophyll a and b have Abs peaks are near 750 nm. Purple phototrophic bacteria: a and b green phototrophic bacteria: c, d, and e |
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What are accessory pigments? What are the two classes?
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They absorb light from other portions of the light spectrum.
2 classes: carotenoids and biliproteins. |
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What are carotenoids? Where are they found? What light range do they absorb?
Example? |
They are lipid soluble, long chained and conjugated hydrocarbons.
found in photosynthetic eukaryotes and prokaryotes. 400-550nm Ex: ß-carotene |
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What are biliproteins? Where do they occur?
Name two examples and the light ranges they absorb. |
They are water soluble, linear tetrapyrroles that are coupled to proteins. Occur only in red algae and cyanobacteria.
Ex: phycoerythrin: 550 nm, and phycocyanin: 620-640 nm. |
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What is the role of accessory pigments? (2 things)
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1. Capture light
2. Prevent photooxidation by acting as light shields for light sensitive chlorophylls. |
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What is the special organelle for photosynthesis in eukaryotes?
Pigments are located in BLANK disks arranged in grana (stacks). |
Chloroplasts
thylakoid |
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Prokaryotes like phototrophic bacteria have special membranes or vesicles to carry out photosynthesis such as BLANK in BLANK BLANK bacteria like Chlorobiaceae and Chloroflexaceae
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chlorosomes
green phototrophic |
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Photophosphorylation by a photon of light exciting an electron in chlorophyll and it being transferred to...
How is the ATP generated? What other process generates ATP the same way? |
another acceptor molecule.
Via chemiosmosis; oxidative phosphorylation |
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Energy of a photon BLANK as the lambda (wavelength) of light BLANK
Name some examples |
increases
decreases Ex: red light is 650nm but 43 kcals of energy Ex: blue light is 450nm but 58kcals of energy |
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What is the overall reaction equation for photophosphorylation?
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Overall reaction: 6 CO2 + 6H2A→C6H12O6 + H2O + 6 A
A=sulfur bacteria O=Plants (A is oxygen in plants) |
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What are the areas where the electron excited by a photon light are transferred to?
This is where BLANK occurs. |
Photosystems; assemblages of pigments 250-400 molecules.
photophosphorylation |
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Eukaryotic noncyclic photophosphorylation is used to generate BLANK and BLANK.
In EUKARYOTIC Photosystem I, the chlorophyll in the reaction center is... In EUKARYOTIC Photosystem II, the chlorophyll in the reaction center... |
ATP and NADPH
P700; P680 |
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In prokaryotic CYCLIC (CYCLIC!!!!) photophosphorylation, Photosystem I consists of photons striking BLANK in chlorobia aka..
Photosystem II consists of photons striking BLANK in BLANK Both systems do not produce oxygen, so they are... |
P840; “Green sulfur bacteria”.
P870; “purple sulfur bacteria”. “anoxygenic” |
