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12 Cards in this Set
- Front
- Back
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Most obligate anaerobes use H+ generated during glycolysis and the Kreb's cycle to |
reduce some other compound other than O2 |
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What is fermentation? |
Incomplete oxidation of glucose or other carbohydrates in the absence of oxygen |
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What does fermentation do? |
It uses organic compounds as terminal electron acceptors
Yields a small amount of ATP
Produces ethyl alcohol by yeasts acting on glucose
Forms acid, gas, and other products by the action of various bacteria on pyruvic acid |
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3 forms of phoyotsynthesis: |
Classical (photoautrophic) Bacterial (photoautotrophic and photoheterotrophic) |
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Products of classical photosynthesis |
02 gas, H2O, carbohydrates |
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Performed by photoautotrophs |
plants, algae, and cyanobacteria
initial electron donor - CO2 final electron acceptor - water |
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2 sets of reactions in Classical photosynthesis: |
Energy-fixing reactions (sunlight) Carbon-fixing reactions (CO2) |
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Bacterial photosynthesis (photoautotrophs) |
Green and purple sulfur bacteria Never produce oxygen gas Initial electron donor - CO2 Final electron acceptor - H2S Products: carbohydrates, H2O, sulfur Bacteriochlotophyll - primary photosynthetic pigment |
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Bacterial photosynthesis (photoheterotrophs) |
Green and purple non-sulfur bacteria Initial electron donor - CO2 Final electron acceptor - organic acids and alcohols Products: carbohydrates, oxidized organic acids and alcohols Bacteriochlorophyll - primary pigment |
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Chemoautotrophs get energy from |
inorganic compounds such as H2, NH3, H2S |
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Chemoautotrophs use CO2 as |
source of energy
(modified type of aerobic respiration) |
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Chemoheterotrophs |
Humans, animals, fungi, bacteria, protozoa
Energy source - organic compounds - carbohydrates
Carbon source - organic compounds - carbohydrates
Either saprobic or parasitic |
